Installing cavity wall

insulation to standard

constructed buildings

up to 12m in height.

+

Technician’s guide to best practice. v4 February 2020

This guide is published by the Cavity Insulation Guarantee Agency (CIGA), as a contribution to best practice in cavity wall insulation.

Whilst every care has been taken in its preparation, CIGA and its authors specifically exclude any liability for errors and omissions or otherwise arising from the contents of this guide.

Readers must understand the principles and practices described in relation to any particular application and where necessary, take professional advice.

© . . . All rights reserved. No part of this publication may be reproduced, store in a retrieval system or transmitted in any form or by any means electronic, mechanical recording or otherwise without the

prior written permission of the copyright holder

PREFACE

This CIGA Guide to Best practice: INSTALLING CAVITY WALL INSULATION

Provides cavity wall insulation technicians with a comprehensive guide to best practice for the installation of

Cavity Wall Insulation (CWI). It offers practical examples of procedures to be carried out by the competent technician. The guide should be followed by all cavity wall installers and used in conjunction with recommended training programmes.

CONTENTS

INTRODUCTION 1 – 2

INJECTION MACHINERY:

Blowing machines used for during the installation of the

following retrofit cavity wall

insulation systems-:

• Mineral Fibre

• Polystyrene Bead

• Injection systems for

Foam

20

Installation Technician Competence

CIGA

BBA

KIWA BDA

3

BUILDING REGULATIONS 4

BUILDING SUITABILITY ASSESSMENT

Exposure

5

QUALITY CONTROL CHECKS

• Mineral Fibre

• Polystyrene Bead

• Foam

21 - 22

IDENTIFYING CAVITY WALLS Other forms of construction other non-traditional construction

6 - 8 MINERAL WOOL FILLING OPERATION

22

PRE-EXTERNALCHECKS

• Garage roofs

• Glass & composite roofs

• Flues, chimneys & combustion air

ventilators other ventilators

• Cavity brushes

• Condition of external walls Weathering details

• Finlock gutters

9 - 14

POLYSTYRENE BEAD FILLING OPERATION

FOAM FILLING OPERATION

23-

PRE-INTERNAL CHECKS

• Dampness & condensation Possible routes for water ingress

• Flues, chimneys & combustion air ventilators

• Other ventilators

14 - 17

MAKING GOOD

Making Good Injection holes to:

• Brick faced properties

• Rendered or Tyrolean- faced walls

Pebble- dash or spa-chipping external

finishes

24 - 25

DRILLING OPERATION 17 - 18 POST – INTERNAL CHECKS 26

CAVITY BARRIERS

• Fitting the barriers 18 - 19

POST – EXTERNAL CHECKS 27

REMOVAL & SLEEVING OF VENTILATORS:

Staggered or Off-Set air vents 19

Work Areas Cleaned

• Damage to building etc

(see customer care

27

INSTALLED DENSITY CHECKS 30 INSTALLED DENSITY CHECKS 28

HEALTH and SAFETY

• Installation Equipment

• PPE (protective clothing)

• Material Handling

• Compressed Air

• Ladders

• Pipes and Cables

• Hand Care

29 - 30

CUSTOMER CARE 31

BUILDINGS UNDER CONSTRUCTION 32

SURVEY FORM – BUILDINGS UNDER

CONSTRUCTION

33

INSTALLATION TECHNICIAN- REGISTER OF

TRAINING & COMPETENCE 34

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INTRODUCTION.

Cavity Wall Insulation (CWI) is one of the most efficient ways of reducing heat-loss from a building.

Insulated homes more energy efficient, warmer and more comfortable. They costless to heat by efficiently reducing heating bills.

Cold indoor environments are known to increase the likelihood of respiratory

illnesses such as influenza, pneumonia, and

bronchitis. In addition, cold conditions in

homes can promote the growth of fungi and house dust mites, which have been linked to

respiratory conditions such as asthma.

The energy wasted in heating poorly insulated

housing, accounts for one quarter of the

polluting greenhouse gases produced by all buildings.

Since the 1930s, a vast majority of houses have been built with cavity walls.

During the construction of a cavity wall, the inner and outer walls are tied together with Wall Ties, These, are usually made of galvanized steel or stainless steel Building regulations set minimum values for the thermal insulation standards of walls, roofs and

floors of new buildings. These standards are

expressed as ‘U’ values; ‘U’ being the symbol for thermal transmittance

Many people assume that walls are watertight, but

in practice this is not the case and must therefore be robustly assessed for its condition suitability.

The reason for the cavity is to stop water penetrating through to the inside of the property and causing dampness.

Over the years the cavity widths have increased, cavity widths can up to an in excess of 100mm.

(seek technical advice / support from BBA – KIWA agreement certificates and system designer technical specifications for suitability and methods of installation).

If the cavity is left empty, air movement

constantly cools down the inner leaf.

As the outside temperature drops, an increasingly higher amount is heat lost through

the external walls.

Installing cavity wall insulation into the cavities can significantly reduce heat lost through the

exterior walls by up to 35%.

Where Heat Escapes.

• 35% External Walls.

• 25% Roof

• 15% Draughts

• 10% Windows.

Un-insulated Wall

Insulated Wall.

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Since the 1980’s Building regulations have required all new houses to have cavity wall insulation installed: Methods include:

Blown in Cavity Wall Insulation:

• Mineral Fibre

• Polystyrene bead or granular systems

• Urea Formaldehyde Foam.

The cavity wall insulation is normally installed through the internal blockwork mortar joints

Built- in Cavity Wall Insulation products / materials.

• Mineral Wool Batts

• Expanded Polystyrene Boards (EPS)

• Expanded Polystyrene Boards (XPS)

• Fil faced polyurethane or phenolic boards

• Concrete blockwork incorporating a layer of: EPS, XPS, PUR or PF insulation (faced or unfaced).

Cavities must be inspected and assessed to determine and confirm the type of partial fill insulation material fitted during the construction is securely fixed using retainer clips etc to the inner leaf, and ensuring that the materials have been installed without gaps or debris between the boards or batts. Residual cavity widths must be recorded.

Regardless of the type of the blown in retrofit cavity wall insulation system the cavities must not be installed into properties with a built in partial fill insulation that is not of a rigid material and is not securely fitted to the inner leaf and that the residual cavity is not less than the minimum cavity width required. (See: BBA / KIWA Agre’ment certificate, and System Designer specification

WHERE A PARTIAL FILL SYSTEM HAS BEEN BUILT IN DURING THE CONSTRUCTION OF THE BUILDING

The only way to insulate a residual cavity is via injection points drilled through the mortar joints of the external walls.

The Installer Company and Installation Technicians must be System Designer trained and approved for the partial fill “system specific” Cavity Wall Insulations System to be installed.

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INSTALLATION TEAM COMPETENCE.

All System Certificated Technicians must be:

• Trained, and approved by the System Designer

• Hold an NVQ Level 2 qualification.

• Registered with BBA / KIWA certification body’s

• Hold an industry approved qualification of technical competence

SYSTEM TESTING and CERTIFICATION.

Cavity Wall Insulation materials/ product and installation system must be tested and approved by either BBA or KIWA (Certification Bodies) and hold a current agre’ment certificate for each system.

COMPLETION OF INSTALLATION

Following The completion of Installation of Cavity Wall insulation by registered and approved CIGA registered member Installer Company, a 25year guarantee is applied for by the installer company and issued to the homeowner by the Cavity Wall Insulation Guarantee Agency (CIGA)

CIGA.

CIGA was set up by all sectors of the industry in 1995, and in conjunction with the government.

Installing companies are monitored, assessed by CIGA at regulated intervals to ensure compliance

Cavity Insulation Guarantee Agency Vimy Court, 3, Vimy Road, Leighton Buzzards Bed’s LU7 1FG Tel: 01525 - 853300

System Designer Cavity

Wall Insulation Approved

Installation Technician for

system certificate number

xxxxx/ xxxx

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BUILDING REGULATIONS

The United Kingdom currently has three sets of Building Regulations.

The Building Regulations

• Covering England and Wales.

The Building Regulations (Northern Ireland)

• Covering Northern Ireland.

Whilst each set of Building Regulations are

different in expression and interpretation, they all require building materials and works

to be fit for the intended purpose.

The Injection of Cavity Wall Insulation is

controlled by the current Building

Regulations.

Agrément Certificates provide detailed interpretation of compliance with the Building Regulations – refer to your system’s Agrément Certificate.

The installation of a retrofit blown in Cavity Wall

Insulation has been deemed to comply with

Building Regulations provided, that it is installed in accordance with the system

designer specification and current BBA / KIWA

certification body Agre’ment Certificate.

In England & Wales, at least 48 hours before

installing Cavity Wall Insulation, the installing company must submit a building notice to the

Building Control Department of the appropriate

Local Authority.

A property must not be filled unless the building

notice has been submitted.

Failure to submit a Building Notice is a criminal offence. The Installer Company shall be asked

to remove the installed materials.

In the event, that the Installer fails to do the extraction works the Local Authority may

serve a notice requiring the installer to do so within 28 days. A substantial fine may also be

imposed.

Example Building Control Notice

CIGA CAVITY WALL INSULATION SELF

ASSESSMENT SCHEME.

The Cavity Wall Insulation Self Certification scheme (CWISC) provides homeowners with

the comfort of knowing that work carried out

by registered and approved contractors complies with the requirements of the

current Building regulations.

The scheme is operated by the Cavity Insulation Guarantee Agency (CIGA) and has

been approved by the Department of Communities and Local Government (DCLG).

Where Installer Companies, are CIGA CWISC Members, Building Control Notifications are applied for by CIGA on receipt of application for a CIGA 25year guarantee under the terms of the competent persons scheme

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BUILDING SUITABILITY ASSESSMENT.

The property / building must be assessed for suitability by a registered and competent Retrofit Assessor. The assessor must hold a current industry approved qualification and registered with CIGA ISA (independent Surveillance Assessment) or CIGA approved independent surveillance company.

The assessor must record all salient facts within the assessment records supported by digital photographs. The Installation must not proceed until such time that the assessment / Desk top assessor has approved the assessment and issued a Unique Reference Number (URN)

Before starting the planned works the installation technician’s, must carry out a pre-installation inspection to verify the details within the assessment. Where details are found to incorrect or where alterations are required as to the methodology of the installation, these must be conveyed to the installer company, the assessor and retrofit Coordinator a required.

The assessment is of particular importance in the case of, flues, chimneys and combustion air ventilation where it is the responsibility of the installation technician to carry out pre and post installation safety checks on flues and appliances. (see CIGA guide to best practice -: Flues, Chimneys and combustion air ventilators)

To carry out these safety checks the technician, must hold a current GSTW certificate.

Cavity Wall Insulation must not take place unless the technician can enter-into the property and is competent and able to complete all necessary checks. It is advised that a responsible adult shall be within the property for the duration of the works.

ARRIVAL TO SITE:

On arrival to site, introduce yourselves to the customer and show you ID.

• confirm that you are at the correct address.

• Go through the customer journey advising the customer of the process of the works.

• Explain that access must be available to the property to include the loft space to carry out the required safety checks and pre installation inspection.

• Check to make sure that the building does not exceed t12m in height.

• Where access is required to the adjoining property or neighbouring properties to allow safe working (ladder access etc) ensure that you obtain permission.

EXPOSURE OF THE PROPERTY.

Retrofit Cavity Wall Insulation systems are tested and approved for use in all parts of the UK. However, this assumes that the outer leaf of the building is constructed in strict accordance with local exposure conditions – so that the incidence of water penetration of the outer leaf is minimal as not to cause distress to the building or the installed cavity wall insulation materials.

For further advice see BBA / KIWA system agreement certificate / System designer specification / manual for any restriction as to use.

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IDENTFYING CAVITY WALLS.

There is no hard and fast rule for identifying if the building is of Solid wall construction or Cavity wall construction, however the appearance of the outer wall brickwork will provide an indication.

Stretcher bond brickwork on the outer wall normally indicates cavity wall construction,

although a stretcher bond is also used on

single leaf walls such as garages.

The first indication that the wall may be of a solid wall construction is:

Visible header bricks within the wall construction (brickwork pattern) there are

two main brick patterns, Flemish Bond and

English Bond. If these are identified, the next step is to measure the width of the wall at

window or door reveals.

If the overall measurement is approximately 230mm the wall construction is likely to be

solid. However, if the width of the wall is 265mm plus it indicates the wall is of cavity

wall construction which may be suitable to receive cavity wall insulation. Additional

checks and investigations must be carried

out to confirm this.

Cavities less than 50mm wide must not be

filled unless the cavity wall insulation system to be installed has been tested, and

approved by the system certification body

(BBA, KIWA BDA)

The Agre’ment certificate must state that the system can be installed allowing the narrow

cavities providing that robust inspections are

carried out to ensure that the cavities are clear of debris to a minimum width of 40mm.

Some pre-1939 properties have cavity wall construction on the ground floor but, often, a

rendered brickwork upper floor with little or no cavity.

The ground floor can be insulated if the 1st

floor - rendered area is in good condition and that cavity tray fitted to protect the top

of the insulation (for further technical advice

see the agreement certification and System designer system specification.

1970s 1930’s imperial Metric brickwork imperial brickwork 290mm 287mm

Solid wall – 238mm

Types of Brickwork / Construction:

Stretcher Bond

Flemish Bond

English Bond

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GABLE APEX CONSTRUCTION

Unless the cavity wall insulation system allows – do not insulate buildings where the inner leaf of the gable wall stops at the upper floor ceiling level. (check inside the loft area to confirm detail).

Suitable – subject to exposure

Suitable

Suitable- subject to weep holes/clear cavity tray detail.

Suitable

Cladded gable end – Suitable subject to closing heads of the cavities

Unsuitable- Except for certificated approved systems only (cavity heads must be closed/sealed off

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OTHER FORMS OF CONSTRUCTION.

Timber Framed.

Although timber framed buildings have a cavity wall construction, their inner, timber-framed

walls may already be insulated. These houses

are not suitable for retrofit Cavity Wall Insulation.

From the outside, timber framed properties are often identical in appearance to standard

masonry construction, with the external brick (Stretcher Bond) walls, so in-depth checks

must be made.

The simple way of identifying a timber frame

dwelling is by tapping the o u t e r walls f r o m

inside the house in a few places. Timber frame has a hollow, plasterboard internal wall, which

sounds quite different from a solid plastered

masonry wall.

Even if it is plasterboard, it is not necessarily

timber framed, it could be a dry-lined masonry inner leaf. Checking the gable apex within the

loft space should give you the final clue. If it is

a dry-lined masonry inner leaf, the blockwork will be visible. If the construction of the

building is timber framed, either the plywood

sheathing or the timber frame itself will be

evident.

Timber Frame

OTHER NON-TRADITIONAL

CONSTRUCTION

Non-traditional or system-built

properties must not be insulated. Concrete Framed

Steel Framed.

These forms of construction include: Steel framed, Airey, Reema, Cornish,

Unity and Wates Houses.

Properties built of non-traditional construction do not comply with: • Current building regulations

relating to cavity wall insulation.

• System certification bodies -: K I W A / BBA

• These systems are not covered by current agre’ment certification

Properties of non-standard construction or System Built must be rejected, and do not qualify for a CIGA Guarantee.

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PRE -EXTERNAL CHECKS.

Once you are satisfied that the property is of suitable cavity wall construction, the installation technicians should carry out other necessary checks to make sure that the property has been correctly assessed.

Garage Roofs

Carefully inspect the condition of the roof and supporting structure. Where damage is identified the customer must be informed and details recorded on the work card / record. The Installer company must also be informed. Where alternative, installation techniques are required the method of installation system must be approved and certificated to ensure that the installation, has been carried out in strict accordance with the agreement certificate and system designer specification.

Glass and Plastic or Composite roofs.

These types of roofing types are fragile structures and can be damaged during the installation process. Generally, these roofing types are not weight bearing structures therefore approved and tested access equipment must be used where a safe working access is required.

Condition of these roof types.

Advise the customer of any damage to roof sheeting, structure etc and record the details on the work records and ensure that a safe-working access is provided or in-place practice before starting the planned works.

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Flues, Chimneys and Combustion Air Ventilators.

Combustion Air Ventilators.

It is vital, that all fuelled appliances and chimney flues within the property are checked for safe operation both at pre installation and post installation stages. Failure to carry out these checks may result in the customer becoming ill, or carbon monoxide poisoning resulting in fatality.

(see CIGA guide to best practice: Technicians Guide -Flues, chimneys and combustion air ventilators)

• At the assessment stage and installation stages you must- Locate, identify and record details on the assessment and work record the location and position of flues, chimneys & combustion air ventilators for all fuel-burning appliances with the property.

Additional checks must be carried out and recorded:

• Appliance Type

• Kw rating

• Open flues – solid fuel Fires

• DLF – ILF fires

• Flueless appliances

Note:

• Where combustion air ventilation is required in-depth checks must be carried out to ensure that existing ventilators are of correct standard applicable to the flue, appliance.

• Where the room of the flue or flued appliance has no combustion air ventilation fitted, the installation must not go head until a regulatory ventilator has been fitted. A signed declaration from the customer advising that they will get one fitted as soon as possible is not acceptable and the planned works therefore must be rejected as the safety of the customer, occupants within the property is paramount.

• Where confirmation of the Kw rating of a heating appliance or the requirement for combustion air ventilation cannot be confirmed i: e appliance id plate or receipt of a gas safe maintenance certificate. (digital date stamped photographic evidence must be obtained by the retrofit assessor and or installation technicians must be retained within the assessment documentation and work records.

Other Ventilators:

• Under floor, Suspended timber floors

• Room Ventilator

• Extractor Fan (kitchen / bathroom)

• Appliance, Flue ventilators

• Radon Gas ventilators

• Cavity ventilators

The function and location of all air ventilators

must be noted, care must be taken as air bricks are not always aligned, and it may be necessary to take out the air ventilator to investigate and confirm this.

Cavity- ventilators, are made obsolete following the installation of blown in cavity wall insulation and must be sealed using an industry- approved products to prevent material escaping or water ingress.

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CAVITY BRUSHES

When installing retrofit blown insulation to semi-detached or terraced housing, a cavity barrier / brush must be installed to confine the insulation material the property being insulated.

The cavity barrier must be installed on the party line of each adjoining property and left in position on completion of the works.

Try to find out if the adjoining properties have received cavity all insulation and if possible, the name of the installer company and material installed. This also applies to buildings where extensions have been added to the original construction of the building.

Where cavity wall insulation has been installed to adjoining properties, ensure that cavity brushes or barriers have been installed and that spillage of materials has not spilled into the property to be insulated. If this is the case the spilled materials should be extracted / removed unless the system to be installed is of an identical system.

CONDITION OF EXTERNAL WALLS

Inspect the whole of the exterior for signs of any major faults, including: Poor Mortar Joints. Unsound or badly eroded mortar joints greatly increase the risk of water penetration. The customer must be advised to have them re- pointed before installing cavity wall insulation. Raked / Recessed Mortar Joints.

• Other Types of Mortar Joints. • Flush, Weather Struck, Bucket Handle. • Recessed.

Settlement Cracks.

Settlement or movement cracks within the brickwork or mortar joints are a pathway for water penetration and must be repaired before the installation is carried out.

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FLAKING or SPALLING MASONRY

The property must not be insulated until such time that the defective brickwork has been replaced and fully rectified.

HOLLOW RENDER.

Render in a poor condition cracked, detached from the wall / brickwork the render must be fully rectified before installing cavity wall insulation

Cracked or Crazed rendering

Must be reported to the customer and must not be insulated until remedial works have been completed.

WEATHERING DETAILS In all cases building details need to be checked at both building suitability and pre installation stages to ensure the suitability of the building to receive cavity wall insulation. The following illustrations provide some common examples, but they are not exhaustive. Gutters and Downpipes Check for damage to the guttering or down pipes and their fittings to ensure that they are securely fixed, and in good condition to ensure that rainwater water entering the guttering system is correctly drained and that they do not allow for water spill and cause continuous wetting of the wall. Where the condition of the rainwater system is damaged or leaking, they must be rectified prior to installing cavity wall insulation

DAMP PROOF COURSES (DPC’S)

Cont’d

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All cavity walls should be protected by a continuous DPC above the ground level

Where there is evidence of rising damp the planned work must not go ahead until such time that the root cause has been identified ad fully corrected:

Areas to consider:

• Ground Level at the same level of or above the DPC. (there should be sufficient clearance between the dpc and ground levels. Where drives / pathways butt up to the outer walls they must also be below the level of the dpc and allow drainage to prevent the possibility, of water saturation at this level

• Broken or Bridged DPC or otherwise ineffective.

• You should also be aware of the location of other DPCs. These are fitted horizontally or vertically, to stop the ingress of water around windows, lintels etc.

1. Cavity Tray above lintels

2. Weep holes above trays

3. Vertical DPC

1. . 2

3

Similarly, you should be aware of the position of cavity trays to avoid: • either drilling into them • accidentally leaving an unfilled

section of cavity between features

Other Cavity Trays: Detail of coping to the cavity wall forming a parapet to low pitched / flat roof.

Cavity trays above meter box’s NHBC Standards 2011

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FINLOCK GUTTERS These pre-cast concrete units are fitted at the head of a cavity during construction. They incorporate a channel, which acts as a gutter to the roof. As the concrete units are butt jointed, they can discharge water into the cavity.

Cavity Wall Insulation must not take place

unless the guttering system has been fully

lined with an approved rigid waterproof material / system. (sealed tray systems only) to

ensure that water cannot, penetrate in-to the cavities. The application of a bitumen, or

sealant is not acceptable as these will perish

or deteriorate.

PRE – INTERNAL CHECKS Pre-Internal checks must be carried out during the assessment / survey stage and by the installation technician’s before commencing the planned cavity wall insulation works. Advise the customer of the inspections that must be carried out to – living rooms/ Bedroom’s / Bathroom/ loft space. • Remove dirty footwear or use footwear

covers before entering the property.

INSPECTION

Ornaments and Fittings.

• Look for any wall mounted ornaments or pictures/ clocks mirrors etc which could be displaced during the drilling operation. Ask the customer to remove them to a safe storage area.

• Check pelmets and windowsills for free

standing ornaments particularly within the bathroom.

Electricity.

• Check the position / location of the electricity meter box where these are mounted on the external walls. This information is vital in the event, that the electricity has, to be turned off, for a period of time during the works.

• In the event of the electricity supply

having to be turned off, you must ask the customer to make any special arrangements for refrigerators, deep freezers as to protect the contents of these units

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Where electrical cables are evident within the cavities, their function ampere and location must be noted. • High voltage mains cables for Cookers,

Showers, should also be relocated, sleeved / protected.

• Low ampere cables must also be protected / safeguarded.

(seek technical advice from a registered and qualified contractor. Also see system specification technical information and guidance)

Sealing the Cavities.

• Check for meter / fuse boxes that are open to the cavity. Seal any large gaps using a class a fire rated material.

• Check under Sink units / Baths

• Waste pipes.

• Areas of internal wall where the inner leaf has been removed or changed. (fitted units / cupboards/ bricked up windows / doors etc

Sash Windows

• Check all sash windows for operation before

and following the installation process and notify the customer and your office where windows are not operating correctly.

INSPECTING THE ROOF SPACE.

Always check the roof space for:

• Signs of timer or steel framed construction

• Condensation within the loft (normally visible to roof timbers / sarking felt) Condensation within the loft is a result of no ventilation or poor ventilation. This must be notified to the customer and the office and corrective actions taken before starting the planned works.

• Check the inner walls for gaps / brickwork missing. These must be sealed to prevent ingress of the cavity wall insulation into the loft space.

• Check eves for clear unobstructed air flow and that the heads of the cavities are sealed / closed off to prevent material ingress and spillage into the soffits.

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DAMPNESS and CONDENSATION

Ask the customer if there has been any concerns or problems with rising or water penetration within the building

Condensation

Rising Damp / Damp Penetration

During your inspection – look for visible signs.

Water penetration is normally indicated by ringed stains or areas of deterioration to the internal plaster / decoration.

Rising Dampness is generally indicated by a tide line up to a height of 1.0meter above the skirting boards.

Where dampness is evident the installation must not proceed until such time that the root cause has been found and corrected.

Condensation is indicated by mould on the internal wall decorations, by glistening and streaked paint on walls and the steaming up of windows. Condensation are generally caused by a combination of:

• Inadequate heating

• Poor or inadequate Ventilation.

• Air born moisture (Kettles. Steam Irons, drying clothing on radiators etc)

POSSIBLE ROUTES OF WATER INGRESS.

• Capillary Action-caused by mortar/debris within the cavity

• Incorrectly fitted wall ties (sloping inwards)

• Wall ties supporting or having mortar / debris on the tie’s

• Extruded mortar joints

• Mortar / debris above the DPC

• Mortar / debris bridging the cavities

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FLUES, CHIMNEYS & COMBUSTION AIR VENTILATORS.

The technician must ensure that all flues / chimneys and combustion air ventilators are thoroughly checked for their position / function and safe working at the pre and Post installation stages.

In the vent that a chimney / flue is not working safely or that during the installation the flue/ chimney or combustion air ventilator’s, become blocked during the installation process this may result in someone becoming ill potential fatality as a result of carbon monoxide poisoning.

Details of the required procedures are provided within the current CIGA Guide to Best Practice Guide -: Flues, Chimneys & Combustion Air Ventilators.

OTHER VENTILATORS.

All ventilators must be checked and recorded within the work records during the pre and post installation checks.

• Location, Type, Size and Condition.

❖ All ventilators must be sleeved and maintained.

❖ New or additional air ventilation fitted where required to meet current ventilation standards.

Exceptions are her ventilators are identified and confirmed as cavity ventilators – whereby these must be sealed off to prevent water ingress or material escape during or following the works

DRILLING OPERATION

The drilling installation pattern must be in strict accordance with the BBA / KIWA agreement certificate and the System Designer Specification.

Every care must be taken to minimise / prevent debris, entering/ falling into the cavities • The drill holes on brick faced buildings must

be drilled horizontally and through the mortar joints.

✓

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• The drill holes – injection points must be drilled at the base of the T on the mortar joint

• On Rendered properties, care must be taken

to prevent brickwork being dislodged and compromising the condition of the cavities and to minimise damage to the render / Tyrolean finishes.

• Drill holes should not be drilled on the line of the 1st floor joists

• Care must be taken when drilling next to

building features (windows, Waste / soil pipes) it is advisable to drill at least two courses below such features.

• All drilling must be completed to each

elevation and at least 2m of the adjacent walls before injection commences.

• On New build properties or new build

extensions the installation may be carried out through the inner leaf prior to plastering. All injection points must be through the mortar joints.

DRILLING PATTERNS. Must be in accordance with: • System Designer Specification • In accordance with the Agre’ment certificate

CAVITY BARRIERS.

Cavity barriers must be fitted to all Semi-detached and Mid Terrace Properties at the junction of the party wall of each elevation to prevent material trespass into the adjoining property – the cavity barriers must be left in place. Possible Exceptions are: • where the adjoining property has received

cavity wall insulation and as a result the cavity barrier is already fitted.

• The adjoining property is to be insulated at the same time. - Where there is a time lapse or delay between the installations a cavity barrier must be fitted.

• Cavity barriers will also require cavity barriers fitted to each side of the windows where the weights are open to the cavities

FITTING THE CAVITY BARRIER • Identify the line of the boundary (in most

cases this will be halfway between the windows of the adjoining properties.

• Drill a hole at the top of the boundary line approximately three courses from the head of the cavity

• Use a plumb line centred at the top hole,

and drill the bottom hole no more than here courses above the DPC

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• Drop a chain down inside the cavity from the top hole, attach the cavity barrier, pull the barrier through the top insertion point and use a metal hooked instrument to pull the chain and barrier through to ensure that the bush has been inserted to the full height of the wall

REMOVAL and SLEEVING OF AIR VENTILATORS. The procedure for treating air ventilators is described within the CIGA guide to best practice -: Flues, chimneys & combustion air ventilators.

Redundant Ventilators:

Following the installation of retrofit blown in cavity wall insulation, Cavity vents on the insulated walls are redundant or no longer in use to ventilate the cavities of the external walls. Therefore, they must be sealed off using mortar, silicone or other approved and suitable materials to prevent water ingress or material spillage.

Ventilators or than combustion air ventilators can be safeguarded by: - • Plastic or Terracotta sleeve. • In-Situ Slate. • Cavity brush – however care must be taken

to ensure that the diameter of brush is of the correct diameter to provide a stable sleeve and does not allow the cavity wall insulation material to bypass the brush.

Staggered or off-set ventilators Where internal and external air vents are not in

line (staggered), the flow of air must be safeguarded by sleeving, or by installing a purpose

made sleeved vent so to align the vents or

maintain an unrestricted air flow

(For further guidance see CIGA technical note: Ventilators.)

Combustion air ventilators. Most regulatory combustion air vents have a continuous sleeve across the cavity to the inside wall. The combustion air sleeve must be securely fitted to both the inner and outer covers. CAVITY WALL INSULATION INJECTION MACHINARY.

Retrofit Blow in Mineral Fibre and Polystyrene Bead cavity wall insulation systems are installed using injection machinery approved by the Agre’ment certification body.

The machine must have an ID plate securely fitted to the machine confirming

• Machine / ID Number.

• The machinery has been tested and approved by the certification body for the cavity wall insulation system for which is being used i: e – Agre’ment certificate number’s

• Calibration of the machine must be carried out by the technician at the start of each job to ensure that the material is installed to the correct density etc and specification.

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Injection system for PU foam. Polyurethane (PU) foam injection systems are formed by reacting two components – resin with a compound containing expanding agent, catalysts and other additives.

The liquid components are contained in pressurised containers and delivered via hoses to the injection gun where the components are mixed and delivered into the cavity wall through a series of holes drilled in a predetermined pattern.

The liquid reacts within the cavity to produce a cellular polymer insulant which hardens into a rigid foam. BLOWING MACHINES FOR MINERAL FIBRE.

• Volume Measured bags of mineral fibre

are fed into the machine hopper where the fibre is agitated 1st stage process the material.

• The material is then fed down int the

pelletizing chamber to further process the material before delivering the fibre through a delivery hose to the injection nozzle for injecting into the cavities.

Typical Injection System for Polystyrene Bead Systems.

The polystyrene used for cavity wall insulation is in the form of a virgin pre-formed bead which is produced to a specifice size and density which remaind constant throughout the process The polystyre beads are transported by compressed air using a fan / venturi system to the delivery hose to the injection gun The adhesive is contained in a separate pressurised stainless steel vessell or pumpsystem. It is fed through a separate hose attached to the blowing hose to aspay jet in the rear of the injection gun where it coatsthe beads as they pass through the gun to the injection nozzle. The flow rates of the bead and adhesive are calibrated during the quality check prcess at the start of the works.

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QUALITY CONTROL CHECKS. During the product manufacting process they must pass the stringent and robust quality control test compliant with the respective British Standards Manufacturing Requirements. At the start of the installation process theinstallation technician must carry out the required on site qiality control calbration checks to ensure compliance with the Agrement Certificate ad System Designer specifications. And record the results within the work records. The quality checks will vary depending upon the System and the machimary being used.

QUALITY CONTRIL CHECKS. MINERAL FIBRE: Installed Density Box Test • The material is blown into the test box

at a pre- determined air pressure and flow rate.

• The filling time is recorded, and results

must be within the required tolerance times + -

• The material is decanted into a weighing

bag and the weight of the material is checked and recorded within the work records.

• The total weight of the material blown into the test box provides an expected average installed density within the cavity walls -: Kg /m3

• Additional checks are made during the

installation to ensure consistency and compliance with the system certification.

• These checks must be carried out and

recorded for each installation. reliance on a one per day check is not permitted.

Polystyrene Bead System. Volume Checks and Adhesive Flow Rates As a vital part of the quality control Check and record Bead flow rates: • Blow the required volume of beads into a

container over a specified period of time

• The adhesive flow rate is also measured over an identical period of time.

• Where required, the necessary adjustments

must be made to ensure both materials are at the correct levels in accordance with the system certification /specification

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PU FOAM The Gel Time, Density, Appearance and Stability is checked to ensure compliance with the agreement certificate and system certification. The quality control checks must be carried out before each installation and results recorded within the work records. The specific details of the required checks are available within the System designer Technical manual and are relevant to the machinery being used.

MINERAL WOOL FILLING OPERATION Injection Nozzles: Straight injection.

Uni-Directional

All mineral fibre systems must be injected into each injection point in turn, starting at a natural barrier i: e cavity barrier etc and at the lowest injection point and working upwards completing each row in turn before progressing p to the next row of holes. • The straight injection nozzle must be the

depth of the outer leaf

• The length of a Uni-directional nozzle must be extended to ensure that the right-angled injection hole within the nozzle is within the cavity.

• When the cavity wall insulation injection

starts, the insulation is blown in at a pre -determined flow rate to ensure that the cavities are filled to the required density.

• When the section of wall area is filled to the

correct density the pressure switch on the blowing machine disengages the blowing valve to prevent a continued flow of material that will result in blockages within the delivery hose, and can be time consuming in clearing the hose in preparation for moving onto the next injection point.

• Check that the insulation has travelled to

the next injection point.

• In the event, that the filling time is less than normal, this may be indicated as a blockage or tightly packed within the nozzle and as a result activating the pressure switch on the machine. Following clearance of any blockage within the nozzle repeat the blowing / injection to the point where the blockage occurred.

• Where the injection or blowing time

exceeds the normal expected blowing time, you should stop and investigate to assess where the excess material is going, possibly Inside the property etc.?

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POLYSTYRENE BEAD FILLING OPERATION. The insulation should be injected into each hole in turn. Start at the bottom corner and continue around the building filling the lowest line of holes – located just below windowsills All, of the injection holes in the lowest row of the elevation must be filled, before moving up to the next row - and so on. It is not necessary to fill gable peaks, unless they form part of a heated living space (room in roof) Where a room in roof exists the drilling pattern must be extended to the uppermost part of the gable wall. • The injection nozzle must be inserted to the

depth of the outer wall. • Activate the compressed air. When you can

see the beads running through the clear section of hose and turn on the adhesive valve.

• The mixture of beads and adhesive flow into

the cavity building up to form a cohesive mass.

• When each injection point is full, back

pressure will stop the flow of beads and at this point the adhesive valve must be closed.

Detailed information is available within the System Designer Operations manual

PU FOAM FILLING OPERATION.

The Insulation Material is injected into the cavity walls through a series of holes drilled in a pre-determined pattern.

• The cavity is filled from the lost point – upwards

• Use indicator sticks in adjacent holes to show when the material has reached the next injection point.

• If the indicator sticks fail to move, you should stop the injection works and investigate.

• As the filling operation progresses, you should monitor the running conditions of the foam gun to maintain quality and efficiency.

Detailed technical information is contained within the System Designers Technical Manual.

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MAKING GOOD.

Following the installation, the making good of mortar joints / render / Tyrolean / spa chippings and replaced air ventilators cannot be over emphasised. Re-pointing of all mortar joints and making good of the rendered or coated facings, must match the existing finishes as far as reasonably practical. The kerbside appearance of the property is paramount. Poor workmanship or poor matching can on some occasions, reflect on the customers assurance of the quality of the installation

Tools: • Bucket.

• Hawk

• Trowel

• Pointing trowel

• Jointing tools.

• Sand / Cement

• Mortar Colourants

• Tyrolean / Render / Spa Chippings

• Exterior masonry paint

• Paint Brushes

A mortar mix should be made up before the filling operation begins, to allow the installing technician to repoint the preceding injection point whist the next one is being filled.

Mortar should be mixed:

• 1 : 1 : 6 Cement - Lime – Sand

• 1 : 4 Cement - Sand • Check the correct colour and texture of the

sand relative to local areas

❖ Plasticiser or Surfactant Must Not be used.

Make sure, at both assessment and pre installation stages that the customer is made aware, that the final finish may not be an exact match particularly where exterior masonry paints are used. Due to weathering / age etc.

For Painted exterior walls: Ask the customer if they have any paint available that was used during the painting of the exterior walls. If not, then the installer must purchase provide the exterior paint ideally before commencement of the installation Re Pointing • Check that the mortar mix matches the

existing. As a guide, wet the mortar joint adjacent to the injection hole and apply the trial mortar to provide an indication of the finished joints. Be aware that different parts of the building may require different colour match. Mortar dyes may help achieve the correct mortar match

• Before making good /repointing clean down

any loose insulant and drilling dust as this will have a detrimental visual effect on the final appearance of the exterior wall facings especially where rendered / Tyrolean coatings have been applied.

• Ask the customer if they have any paint

available that was used during the painting of the exterior walls. If not, then the installer must purchase provide the exterior paint ideally before commencement of the installation.

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Re-Pointing of Injection Holes to Brick Faced Properties • The mortar must be filled to the full depth

of the outer leaf.

• The mortar joints must match the existing mortar joints using the appropriate joint tools.

• Where brick facings are damaged (corners

of the bricks) during the drilling process. These must be made good and colour matched to the brick facing.

Rendered / Tyrolean Spa chippings Special care must be taken with rendered walls. The colour and texture of the render should match the existing as far as reasonably practical Where the render is painted ask the customer both at the assessment and pre installation stages if they have any of the original exterior masonry paint

• Colour matching can be carried out using paints or colours dyes.

Alternatively ask the customer, if they

have any of the original paint.

• A mortar based white cement may be

useful for refilling holes in white painted rendered properties

• Minimise the area you are painting to

reduce the repair areas to assist the

final appearance. Injection holes must be filled to the full depth of the outer leaf brickwork.

Pebble-Dashed or Chipping Faced Finishing’s. To assist in the matching of the existing finishes it may be possible to retain the original chippings during the drilling operation. Separate the chippings from the debris that has fallen from the face during the drilling operation. There may be sufficient chippings. however, where required matching chippings should be localised. The mortar mix may need to be slightly wetter, in order to securely retain the pebbles / chipping.

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POST INSTALLATION INTERNAL CHECKS. Remove or cover dirty clothing and footwear before entering the house. It is vital that post – installation checks on all flues and fuel-burning appliances are carried out on external walls, and that the required combustion air ventilation is in place, allows unobstructed air flow and not compromised, The technician must be minded that appliances on internal walls may be unsafe. It may therefore be prevalent to carry out the respective flue and spillage checks at the same time. In the event, that these flues and appliances show a concern, the technician should advise the customer to have them checked by a registered gas safe or solid fuel engineer. [Refer to CIGA Guide to Best Practice Guide: Flues, Chimneys &Combustion air ventilators]. Ensure that the cavity wall insulation has not entered inside the property Check: • Each room • Underneath Sink units / baths etc • Loft area • Boilers / water heaters on external walls All spilled material must be cleared away and removed from site.

• Ensure that all room ventilators are open and not compromised and allow unobstructed air flow.

• Check operation of extractor fans, Vent

axias

• Combustion air vents are not compromised

• Ensure all electrical circuits and appliances

are re-instated • Replace ornaments, mirrors etc which have

been removed at pre installation

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POST – EXTRNAL CHECKS. Following the completion of the installation, the installation team must check to ensure that: • All holes have been made good and

Repointed. • The colour match of the mortar and render

or wall coatings and where air ventilators have been reinstated are satisfactory

• All debris, dust has been cleared up and removed from the site for disposal. To include: Pathways, Garage or conservatory roofs, driveways, windows / doors. Ensure that adjoining properties are also free of dust / mortar, spillages etc

• Work areas hosed / washed down

Have a last look around the property for any damage caused during the works. Where damage has occurred, take the appropriate action you can within the level of your expertise. Inform your office / supervisor of all salient facts and information Always record any remedial action on the work records proving the following information: • Item or building fabric damaged • Roofs etc • Areas inside garages • Internal décor or damage ❖ Provide Cause – (brief notes) ❖ Take and supply your office with digital

images of any damages or raised concerns etc.

❖ Where repairs cannot be resolved at the

time of the installation, advise the customer accordingly of the appropriate actions

(See Customer Care)

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INSTALLED DENSITY CHECKS. Method of Calculation Mineral Fibre: Kg/M3 = Qty of Material Installed Kg

Volume (M3) Material installed (KG)

= The number of bales used X the weight of

each bale (Kg) (bag weights are registered on the packaging + - ) Volume (M3) = Nett m2 area of works X Cavity width (MM) Cavity widths can vary considerably throughout each / individual building To assess the average cavity width the technician must measure and record at least 10 readings. The total mm divided by the number of cavity width readings will provide an average cavity width to be used within the calculation EG:

POLYSTYRENE BEAD The Average installed density of polybead cavity wall insulation systems is of a constant kg/m3 due to the nature of the manufacture / size of bead etc. As a vital part of the quality assurance process to ensure the correct fill and the specified methodology of compliance of the system specification see the System designer Technical Support Information l Example Calculation: Volume of Material Installed

Average Cavity Width mm

cavity depth

measured

1 mm

2 mm

3 mm

4 mm

5 mm

6 mm

7 mm

8 mm

9 mm

10 mm

TOTAL mm

Divide the total mm x 10 =

average cavity width

mm

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HEALTH & SAFETY. The Health and Safety at Work Act states that it is the duty of every employer to ensure as far as is

reasonably practical, the health and safety at work

of all employees.

It is also the duty of employees to take reasonable care of their health and safety,

and to comply with safety regulations.

Acquaint yourself with your company’s current

safety policy manual. All aspects of safety must conform to the current Health & Safety at Work

Act regulations

Installation Equipment: • Ensure safety systems, including guards,

are fitted and in place

• Take care when removing wrapping

from bales and filling hopper /

machine etc

• Disconnect the electrical supply when working on equipment.

Protective Clothing (PPE)

The following must be worn during

the installation process

• Protective clothing

• Safety Harness – (working at height)

• Goggles

• Hard hat

• Dust mask

• Ear defenders

• Gloves.

• Protective footwear.

HANDLING MATERIALS.

• Take care when handling all materials

• Always wear the correct – approved dust mask appropriate to your work function.

• Acquaint yourself with the health and safety information on the packaging and follow the advice provided.

• Further health risk information is provided within the planned works risk assessment for each installation.

COMPRESSED AIR

• Where systems or methods of works

require the use of compressed air units the equipment must be checked daily before use in strict accordance within the equipment manual / inspection record requirements.

• Replace any split hoses immediately.

• Use only the correct sized couplings and fittings.

• Ensure that all valves and fittings are in a good and safe condition.

• The person inspecting, operating or servicing the compressed air equipment must be trained and competent to carry out these duties.

LADDERS – HOP UPS – STEPS

Must Be:

• Type selected to safely carry out the required duties and intended use during the works

• Check condition before use • Damage access equipment must be

notified to your office immediately • Ladders must be Properly secured to the

outside walls using approved equipment applicable to the access equipment. (Tetra – Etc)

• Steps and Hop-Ups must be secured in a safe manner.

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PIPES and CABLES Where pipes and cables cross a public right of way such as a footpath, warning signs must be in place advising the public of the hazard. Cover hoses / cables with a suitable bridge so as to avoid a trip hazard.

During the installation process:

Place / store hoses and cables etc in an orderly manner as to prevent trips – falls during the works. Customers must also be advised of the hazards. Should the customer require access or egress from the building the technicians must ensure that the respective persons are advised and assisted, and that their health and welfare safeguarded.

HANDCARE.

Technicians should use appropriate barrier or hand creams to avoid possible irritation, cracked hands, dermatitis. Before eating foods or using welfare facilities the technician must wash their hands and reapply the barrier cream etc before starting the works.

It is advisable that the correct gloves applicable to the work function are used during the process as an added protection:

• Mineral Fibres • Resins

• Wet Mortars. • Cement

• Tyrolean etc These measures are not exhaustive and additional measures may be required. Hazards relating to hand care etc are advised within the risk assessment form.

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CUSTOMER CARE

The following points may seem so obvious as to

be trivial but remember this: as far as the customer is concerned, this is their first

experience of Cavity Wall Insulation.

You will be judged on what is important to them

– not what matters to you.

• Check you are at the correct address

and identify yourself – showing the

necessary credentials. Always

communicate with the customer in a polite and appropriate manner

• Don’t park vehicles on the customer’s

drive without their permission.

• Explain to the customer what you intend to do before you start work.

• Remind the customer that you will

need access to the building to carry out

the necessary- pre installation checks.

• Advise the customer of any precautions needed e.g., removal of ornaments etc.,

from windowsills, desktops etc.

The technician should offer to assist them should they require.

• If the property is adjoined to a

neighbouring property, ask if the

neighbours are aware of the works to be

carried out. If they are not, then advice

should be provided accordingly.

• As the customer and immediate

neighbours to remove cars, caravans

parked on driveways and remove washing from clothes lines. It is also

advisable that the customer and their

immediate neighbours close their

windows to prevent air born dust /

material entering into their properties.

• Put down dust sheets where required

• If working in a garage remove items from shelves affected by the work. Make sure these are replaced.

• Clear up and remove from site any debris as soon as possible.

• Point out any problems or defects, to the customer before starting the work and note them on your work sheet.

• If you use towers, ladders, planks scaffolding etc., explain to the customer what you are doing and why.

• Take care with garden plants and lawns. Use planks or boards, ladder stays where necessary.

• If the work being carried out varies from what the customer was originally told, be sure to fully explain why. (Contact your office for instructions before commencing the works).

• If any damage is caused however small, inform the customer and report the matter to your company. Tell the customer that the matter will be dealt with appropriately.

• If the customer complains you should record their complaint and refer the matter back to your company with the assurance that it will be dealt with quickly.

• If customers ask about a guarantee, advise them that this is issued by the Cavity Insulation Guarantee

Agency (CIGA). And shall be forwarded following completion of the works

• Provide handover documentation and request any required signed satisfaction notification.

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BUILDINGS UNDER CONSTRUCTION.

CIGA guarantees are available for new build housing.

• The Design and planning of NewBuild Housing is carried out priorto construction by the appointedarchitects. The design includesthe determining the requiredmeasures required in retainingheat loss / ventilation and energysaving comfort and welfare ofthe homeowner.

• On arrival to site to carry out theplanned works, the techniciansmust call into the site managersoffice to introduce themselvesand confirm what they are thereto do

• The installing technician mustprovide evidence of their currentCSCS card and details recordedon the site register. During thistime the technician may berequired to undergo a siteinduction before entering intothe work areas.

• On arrival at the property thetechnicians must inspect andassess the current condition ofthe building and suitability forthe works to be carried out.Details and example of a newbuild inspection and work recordsheet is provided within thepreceding pages of the bestpractice guide.

• In practice the technicianbecomes the building suitabilityassessor for the installercompany, and has the authorityconfirm that the building can /cannot be insulated in its currentstage of its construction.

• Photographic evidence should betaken at the assessment stage toconfirm the condition of thebuilding. Where the building isdeemed unsuitable in its currentstate the installers office /supervisor, and, Site Manager,must be informed.

• The installation of cavity wallinsulation is carried out frominside the building prior toplastering.

• Drilling and injection of theinsulation material should bethrough the mortar beds and notvia window heads etc.

On Completion of the works the technician must record:

The results quality control checks, Quantity of materials installed and measured cavity widths to confirm the design widths of the cavity.

It is advisable that other properties on the site are visually checked and any defects etc noted

before leaving site provide the completion records to the site manager.

✓

X

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Installer Company

Installation Team Name’s

Date of Proposed Installation:

Client / Builder:

Site Address:

Plot Number:

System to be Installed:

Agre’ment Certificate Number:

Internal Fill / External Fill

Details of Property to Be Insulated:

Property Type:

House / Bungalow / Flat / Other

Detached / Semi Detached / Mid Terraced / Other

Expected M2c Area to be Filled M2

Design Cavity Width:

Areas of Wall to be Omitted:

Construction Type:

Outer Leaf : Brick / Block

Inner Leaf : Brick / Block

Type of Wall Ties

Number of flues on External Walls.

Type of Flue : Conventional true Flue

Type of Mortar Joint: Not Recessed / Recessed

Is the Roof Complete: YES NO

Cavities sealed to doors / windows: YES NO

Weep Holes to Lintels: YES NO

Cavities Clear of Mortar Bridging YES NO

Cavities free of Debris YES NO

Remedial / Additional Works to be undertaken / completed by the client / Builder /Installer

Technicians prior to the installation YES / NO Description:

Technician Work Record:

Measured Cavity Width mm

Height of Building Mteter

Measured area of cavity walls insulated.

Quality Control Checks:

Qty of Material Installed:

Material Batch Number:

Resin Batch Number:

Bead / Resin Flow Rates:

Test Box Weight

Test Box Time:

Assessor / Installer Declaration:

I confirm that I have carried out the required inspection/ assessment , of the property / building for suitability for treatment in accordance with the required standards and system requirements as far as can be practically determined, and that the property is suitable to receive cavity wall insulation.

Installer Company - NAME:

Signature:

Date:

Site Manger / Client

NAME

Signature

Date

Survey / Assessment Form for Buildings Under Construction

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CAVITY WALL INSULATION INSTALLATION TECHNICIAN REGISTER of TRAINING / COMPETENCE

Name of Technician

Start Date

Training Start Date

Tick Each Box to Confirm That the Required Training Has Been Completed

Office Induction

Maintain / Install Room air Ventilators

Health & Safety Induction

Combustion Air Ventilators

Customer Care

Maintain / Fit Under Floor Ventilators

Attended Gas Safety Training Course

Operation of Blowing Equipment

On Site training Filling

Carry out Quality Control Checks

Completion of Work Records

Filling operation / procedures

Carry out Pre - Installation Checks

Making Good of Mortar joints / air vents /

On Site Training Drilling / Procedures

Making Good Tyrolean / Render Coatings

Fitting of Cavity Barriers Successfully Attend System Designer

Training Course (Classroom)

NVQ Level 2 Currently on Platform

NVQ Level 2 Awarded

INSTALLER COMPANY CAVITY WALL INSULATION TECHNICIAN TRAINING DECLARATION

This Declaration is to confirm that : Has successfully completed the training programme set out in this document

System Designer & Classroom Course Completion Date

System Designer & BBA / KIWA BDA Certificate Number

Installer Company Trainers Name

Installer Company Trainers Signature

Installer Company Training Completion Date

System Designer ID Card Issued YES NO Date: 34