Readers are advised to check the validity of this Certificate by either referring to the BBA’s website (www.bbacerts.co.uk) or contactingthe BBA direct (Telephone Hotline 01923 665400).

1 The Building Regulations 2000 (as amended) (England and Wales)

The Secretary of State has agreed with the British Board of Agrémentthat the extension of a building by the addition at ground level of aconservatory, where the floor area does not exceed 30 m2, is exempt

from the Building Regulations.

2 The Building Standards (Scotland) Regulations 1990 (as amended)

A conservatory forming a single-storey extension to an existing dwellingof purpose sub-group 1B or 1C, where the conservatory does notcontain a flue or heat-producing appliance, is not within one metre of a

boundary and the floor area does not exceed 8 m2, is exempt from theseRegulations. For conservatories with floor areas between 8 m2 and 30 m2 thefollowing is acceptable:Regulation: 22 Conservation of fuel and powerStandard: J7.1 Conservatories

Comment: Glazing (including frames) for conservatories above 8 m2 butunder 30 m2 may have a U value not more than 3.3 Wm–2K–1.See sections 5.1 and 5.2 of Detail Sheet 2 of thisCertificate.

Ultraframe (UK) LtdEnterprise WorksSalthill RoadClitheroeLancashire BB7 1PETel: 01200 443311website: www.ultraframe.com

AgrémentCertificate

No 03/4039Second issue*

Designated by Governmentto issue

European TechnicalApprovals

ULTRAFRAME UZONE CONSERVATORY ROOF SYSTEMSystème de serreGewächshaussystem

Product

Regulations — Detail Sheet 1• THIS CERTIFICATE RELATESTO THE ULTRAFRAMEUZONE(1) CONSERVATORYROOF SYSTEM.• The roof system is forconservatories used asextensions to new or existingbuildings where an externalgrade door separatesconservatory from inner room.• It is essential that the roofsare installed and used inaccordance with the conditionsset out in the Design Data andInstallation parts of these FrontSheets and accompanyingDetail Sheets.(1) Trademark of Ultraframe (UK) Ltd.

CI/SfB

996

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3 The Building Regulations (Northern Ireland) 2000

A conservatory constructed as an annexe to an existing building andhaving a floor area not exceeding 30 m2 and not less than one metrefrom any boundary is exempt from these Regulations provided that the

conditions described in A5 Exemptions are met.

4 Construction (Design and Management) Regulations 1994 (as amended)Construction (Design and Management) Regulations (Northern Ireland)1995 (as amended)

Information in this Certificate may assist the client, planning supervisor,designer and contractors to address their obligations under these Regulations.See section: 2 Delivery and site handling (2.4 and 2.5) of Detail Sheets 2

and 3.

Design Data

5 Strength and stability5.1 The manufacturer’s design procedures for theUltraframe Uzone Conservatory Roof System aregenerally in accordance with the relevantrequirements of:• BS 6399-2 : 1997• BS 6399-3 : 1988• BS 8118-1 : 1991• BS 8118-2 : 1991.

5.2 Structural testing has been used to verify therelevant aspects of the manufacturer’s designprocedures.

5.3 Roofs designed in accordance with themanufacturer’s design procedures will haveadequate resistance to wind loads calculated usinga basic wind speed of 25 metres/sec inaccordance with BS 6399-2 : 1997. Themagnitude of the wind load will depend on anumber of factors including height above sea level,location and size and configuration of roof. It istherefore recommended that BS 6399-2 : 1997 isused to calculate the actual wind load when theroof is used over 100 m above sea level, inexposed and coastal positions and where thebasic wind speed is over 25 m/sec.

5.4 The roof is designed to support an imposedload of 0.8 kNm�2. The magnitude of the actualsnow load will depend upon a number of factors,such as height above sea level, geographicallocation, roof size and arrangement. It is, therefore,recommended that BS 6399-3 : 1988 is used tocalculate the actual snow load when the roof isused in areas where a load greater than0.8 kNm�2 can be expected. The deflection limitson roofs designed in accordance with 5.1 are

acceptable and are such, that watertightness willbe maintained after loading.

5.5 Details of the connections between the roof,the existing structure and the conservatory walls aredependent upon their type and condition.Guidance is available from the Certificate holder orshould be entrusted to a suitably qualified person.

6 Ventilation and solar heat gain6.1 Trickle ventilation for Uzone duo-pitch roofs isprovided through the finial stack vent (see Figure 1).Additional background ventilation can be providedby the inclusion of controllable trickle ventilators inthe head of window and door units whererequired. Uzone Elevation roofs provide trickleventilation at the eaves beam and wallplatepositions (see Figure 2).

Figure 1 Stack vent finial

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Figure 2 Wall plate trickle vent

6.2 Outward opening casement or tilt and turnlights can be included in the wall frame options toprovide natural ventilation. The precise area ofopening can be calculated. A habitable room maybe ventilated through an adjoining conservatory ifthe ventilation openings have an area appropriateto Building Regulations requirements.

6.3 Opening roof vents can be included whererequired to provide greater levels of ventilation.

6.4 Solar heat gain through the roof panels andwall frames may provide a useful additional heatinput during winter conditions; however, summertimeinternal temperatures will also be raised. To limit

the latter effect, the following design factors shouldbe considered:• orientation with respect to south• aspect ratio of the floor plan of the conservatory• area of opening lights and doors to area of floor

expressed as a percentage.

6.5 As an approximate guide, northerly facingconservatories should have opening lights or doors ofnot less than 15% of the floor area, rising to not lessthan 25% with roof blinds for those of a southerlyaspect. This should limit the solar gain temperaturerise to less than 12°C for most situations insummertime, using only natural ventilation. Wherelower temperature rises are desired, considerationcan be given to mechanical forced ventilation.More precise methods of design and solar dataare given in CIBSE (Chartered Institution of BuildingServices Engineers) Guide Book, Parts A4 and A6.

6.6 To reduce the effects of solar heat gain on theinternal temperature of the conservatory, blinds canbe fitted, but their performance has not beenassessed by the BBA.

7 Security against intrusion7.1 Glazing sheets are retained by glazing bartop cappings. An additional glazing bar securitydevice (see Figure 3) is also fitted and thereforeremoval of glazing bar top cappings is extremelydifficult without use of a special tool.

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Figure 3 Security clip for glazing bar top cap retention

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7.2 The roof light is fitted with a screw-closingmechanism and provides reasonable securityagainst unauthorised entry by the opportunistintruder.

7.3 It is recommended that a conservatoryforming an extension to an existing dwellingshould retain a lockable exterior type door to themain building.

8 Ease of operationThe roof vent can be operated without difficultywhen correctly installed in the conservatory roof.

9 Maintenance9.1 The conservatory roof can be re-glazedand the gaskets replaced, but these operationsshould be carried out using the materials suppliedby the Certificate holder and approved bythe BBA.

9.2 If damage occurs to a roof vent, thefurniture and fittings can be readily replaced byreleasing the fixing screws and changing the fitting.

9.3 The PVC-U internal and external claddingscan be cleaned using water containing householddetergent. If dirt is allowed to build up on themembers over long periods it may become moredifficult to restore the surface appearance.

9.4 Care should be taken when using proprietarymaterials for cleaning the glazing to ensure thatdeposits are not allowed to remain on the PVC-Uwhere they may cause discoloration and damageto the surface. In addition, care must be taken toavoid damage to, or discoloration of, themembers when stripping paint from adjacentsurfaces, for example, by means of a blowlamp,paint stripper or mechanical stripper.

9.5 Paints can adversely affect the impactstrength of the PVC-U cladding and theapplication of dark colours could lead to a risk ofthermal distortion. Therefore painting is notrecommended.

9.6 The roof vent locking mechanisms and hingesshould be lubricated periodically to minimise wearand to ensure smooth operation, as recommendedby the Certificate holder.

9.7 The roof panels can be readily replaced, ifdamaged, by removal of the glazing bar securitydevice using a special tool, allowing removal ofglazing bar top caps. Cleaning should be carriedout using water containing household detergent.To avoid scratching of the surface, only soft clothsshould be used when cleaning.

Installation

10 General10.1 Design and manufacture of the UltraframeUzone Conservatory Roof System is undertaken bythe Certificate holder in accordance with theirtechnical manuals.

10.2 Uzone adopts a Clicklock technology,allowing quick assembly on site. All claddings andaluminium sections are prefabricated. The majorityof claddings and thermal sleeves are also pre-fitted,to reduce on-site installation time.

10.3 Cavity trays are required where theconservatory roof abuts the wall of the buildingfor new construction and consideration is given totheir inclusion in existing walls in exposedsituations.

10.4 When the pitch of the building roofadjacent to the conservatory is steeper than 45°consideration should be given to the inclusion ofsnow guards. This will prevent the worst effects ofsnow slides and dropping debris.

11 Preparation11.1 All supporting side frames incorporatingwindow profile material, ie PVC, timber oraluminium, should be designed in accordancewith the relevant British Standards for imposedloadings. The side frames/walls must provideconservatories with overall lateral stability andresistance to axial loading. Advice should besought from the frame supplier for the specific useof members for the conservatory construction, withdue consideration given to the recommendedpackings between glazing and framework.

11.2 Foundations must meet the requirements ofBS 8004 : 1986, NHBC Standard, Chapter 4 :1992 and Zurich Building Guarantees TechnicalManual, where applicable. Consideration shouldbe taken of local conditions and advice soughtfrom the local authority when necessary. If thereare any doubts with regard to the stability of asite, a suitably qualified engineer should beconsulted.

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Bibliography

BS 6399-2 : 1997 Loading for buildings — Codeof practice for wind loadsBS 6399-3 : 1988 Loading for buildings — Codeof practice for imposed roof loads

BS 8004 : 1986 Code of practice for foundations

BS 8118-1 : 1991 Structural use of aluminium —Code of practice for designBS 8118-2 : 1991 Structural use of aluminium —Specification for materials, workmanship andprotection

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Conditions of Certification

12 Conditions12.1 This Certificate:(a) relates only to the product that is named,described, installed, used and maintained as setout in this Certificate;(b) is granted only to the company, firm or personidentified on the front cover — no other company,firm or person may hold or claim any entitlement tothis Certificate;(c) is valid only within the UK;(d) has to be read, considered and used as awhole document — it may be misleading and willbe incomplete to be selective;(e) is copyright of the BBA;(f) is subject to English law.

12.2 References in this Certificate to any Act ofParliament, Regulation made thereunder, Directiveor Regulation of the European Union, StatutoryInstrument, Code of Practice, British Standard,manufacturers’ instructions or similar publication,are references to such publication in the form inwhich it was current at the date of this Certificate.

12.3 This Certificate will remain valid for anunlimited period provided that the product and themanufacture and/or fabrication including allrelated and relevant processes thereof:(a) are maintained at or above the levels whichhave been assessed and found to be satisfactoryby the BBA;

(b) continue to be checked as and when deemedappropriate by the BBA under arrangements that itwill determine; and(c) are reviewed by the BBA as and when itconsiders appropriate.

12.4 In granting this Certificate, the BBA is notresponsible for:(a) the presence or absence of any patent,intellectual property or similar rights subsisting in theproduct or any other product;(b) the right of the Certificate holder to market,supply, install or maintain the product; and(c) the actual works in which the product isinstalled, used and maintained, including thenature, design, methods and workmanship of suchworks.

12.5 Any recommendations relating to the use orinstallation of this product which are contained orreferred to in this Certificate are the minimumstandards required to be met when the product isused. They do not purport in any way to restate therequirements of the Health & Safety at Work etcAct 1974, or of any other statutory, common lawor other duty which may exist at the date of thisCertificate or in the future; nor is conformity withsuch recommendations to be taken as satisfying therequirements of the 1974 Act or of any present orfuture statutory, common law or other duty of care.In granting this Certificate, the BBA does notaccept responsibility to any person or body for anyloss or damage, including personal injury, arisingas a direct or indirect result of the installation anduse of this product.

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In the opinion of the British Board of Agrément, the Ultraframe Uzone Conservatory Roof Systemis fit for its intended use provided it is installed, used and maintained as set out in thisCertificate. Certificate No 03/4039 is accordingly awarded to Ultraframe (UK) Ltd.

On behalf of the British Board of Agrément

Date of Second issue: 14th March 2005 Chief Executive

*Original Certificate issued on 29th September 2003 (but not printed). This amended version includes reference tonewer British Standards tests, a revised Bibliography and new Conditions of Certification.

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Blank page

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British Board of AgrémentP O Box No 195, Bucknalls LaneGarston, Watford, Herts WD25 9BAFax: 01923 665301

©2005For technical or additional information,contact the Certificate holder (seefront page).For information about the AgrémentCertificate, including validity andscope, tel: Hotline 01923 665400,or check the BBA website.

e-mail: mail@bba.star.co.ukwebsite: www.bbacerts.co.uk

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Readers are advised to check the validity of this Detail Sheet by either referring to the BBA’s website (www.bbacerts.co.uk) or contactingthe BBA direct (Telephone Hotline 01923 665400).

• THIS DETAIL SHEET RELATES TO THEULTRAFRAME UZONE(1) VICTORIAN/GEORGIANCONSERVATORY ROOF SYSTEM.

This Detail Sheet must be read in conjunction with theFront Sheets, which give the product’s position regardingthe Building Regulations, general information relating tothe system, and the Conditions of Certification,respectively.(1) Trademark of Ultraframe (UK) Ltd.

Technical Specification

1 Description1.1 The Ultraframe Uzone Victorian/GeorgianConservatory Roof System is designed andfabricated by Ultraframe (UK) Ltd for use in theexposure conditions described in this Certificate.

1.2 The roof system is of aluminium constructionwith white PVC-U internal and external claddingavailable in the following configurations:• Victorian/Georgian style (duo pitched) with a set

roof pitch of 22.5° (see Figure 1).

Certificate No 03/4039

DETAIL SHEET 2Second issue*

Ultraframe (UK) Ltd

THE ULTRAFRAME UZONE VICTORIAN/GEORGIAN CONSERVATORY ROOF SYSTEM

Product

CI/SfB

996

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Figure 1 Conservatory roofs

1.3 Uzone roofs are designed to a maximumprojection of 3.75 m and width of 3.75 m. Withinthis size range, permissible bar centres andconfigurations are described in the Ultraframetechnical manuals; this Certificate relates to roofsused on conservatories not exceeding theseparameters.

1.4 The full specifications and drawings for thematerials and components covered by thisCertificate have been examined and are retainedby the BBA. This section gives only general detailsof the system. A complete schedule of thecomponent parts is contained in the Ultraframetechnical manuals.

1.5 The Uzone roof adopts a click-fit jointconnection technology, allowing quick assemblyon site (see Figure 2). All claddings and aluminiumsections are pre-fabricated. The majority ofcladdings and thermal sleeves are also pre-fitted, toreduce on-site installation time.

1.6 The roof system consists of the followingcomponents supplied to site in assemblies/items:Invertabar(1) assembly• Invertabar (transom/hip bar/starter bar) section

extruded from aluminium grade 6063-T6 toBS 1474 : 1987(2), fitted with PVC-U sleeveand integral co-extruded gaskets. TheInvertabar is also fitted with a proprietary,structurally-engineered composite Clicklock(1)

(see Figure 2)(1) Registered trademark.

(2) Mechanical properties of this alloy type are defined inBS EN 755-2 : 1997.

• polycarbonate roof panels, 16 mm or 25 mm,supplied with PVC-U end trim with integralco-extruded gaskets

• Georgian bar reinforcing insert manufacturedfrom galvanized steel grade S300GD+Z toBS EN 10326 : 2004 (applicable to Georgianroofs only exceeding 3 m by 3 m).

Figure 2 Clicklock feature

Victorian style

Invertabar with Clicklock Victorian hub with Clicklock

Georgian style

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Ridge beam assembly• ridge beam extruded from aluminium

grade 6063-T6 to BS 1474 : 1987 suppliedwith PVC-U internal cladding, PVC-U rain baffleincorporating co-extruded gaskets and fitted witheither a Victorian or Georgian engineeredcomposite hub (dependent on style of roof) andfan mounting bracket (see Figure 3). In addition,the aluminium ridge is fitted with a spirit levelbubble (see Figure 3), to facilitate fast andaccurate installation

• Victorian or Georgian weathering traymanufactured from PVC-U (see Figure 4).

Figure 4 Weathering tray

Eaves beam assembly• eaves beam extruded from aluminium

grade 6063-T6 to BS 1474 : 1987 fitted withPVC-U external thermal cladding, PVC-U glazingsupport trim with integral foam tape and acomposite structural corner joint. The assembly issupplied with internal PVC-U thermal claddingswhich are fitted on site.

Starter bar assembly• starter bar extruded from aluminium

grade 6063-T6 to BS 1474 : 1987 and fitted

with engineered composite wall bracket (ateaves level)

• fitting accessories include an aluminium die-castridge wall plate with nylon grip and engineeredcomposite eaves/starter bar wall brackets (seeFigure 5).

Figure 5 Ridge wall plate

Ancillary items• an opening roof vent designed to match the

glazing bar sections is available if required (seeFigure 6).

Figure 6 Roof vent

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Figure 3 Victorian ridge

showing fan mounting bracket showing ridge bubble level

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• a PVC-U ridge cresting (see Figure 7) isavailable as an optional extra.

Figure 7 PVC-U ridge cresting

• Conservaflash(1) — a PVC-U flashing system (seeFigure 8) is available as an alternative totraditional lead flashing.

(1) Trademark of Ultraframe (UK) Ltd.

Figure 8 Conservaflash

1.7 An aluminium eaves ring beam assembly isattached to the supporting side wall structure withcorner joints fixed with zinc-plated screws.

1.8 Glazing bar assemblies are attached to theeaves beam assembly and ridge beam assemblywith Clicklocks. Hip bars are clamped onto theridge hub and corner joints with Clicklocks. Starterglazing bars are attached to the ridge and eaveswith wall brackets at eaves beam level and wallplate at ridge level. The starter glazing bars arefixed directly to the existing building usingappropriate fixings.

1.9 Glazing panels supported by the glazing barsare located into the ridge system through a PVC-Urain baffle and co-extruded gasket providing a sealagainst ingress of moisture. External PVC-U capswith co-extruded gaskets snap into position on theglazing bar sleeves and hold down the roof

panels, forming a seal between the internal andexternal gaskets.

1.10 Security clips are then fitted to top caps/sleeves to prevent any possibility of top cap removal.

1.11 To prevent the ingress of moisture theweathering tray is positioned at the ridge end atthe intersection of the hip bars and a silicone sealis applied to dedicated channels. The Jack rafterflashing is fitted below the top cap at the hip bar/jack rafter junction to form a weather seal joint.

1.12 An external PVC ridge cap with integralridge hub cover is positioned on top of the ridgebody and is clamped in position from the insidewith nylon fixing rods.

1.13 A PVC gutter system is attached to the eavesbeam PVC-U external cladding around the fullperimeter of the roof using push-fit brackets. Theinternal face of the eaves beam is clad with aninternal PVC cladding and all cover mouldings,both at eaves and ridge, are then fitted.

Quality control1.14 Quality control includes checks on allmaterials and components, in particular:• extruded PVC-U profiles• engineered composite components

Fabrication of roof system• Invertabar assembly• eaves beam assembly• ridge beam assembly• extrusions and components (visual inspection)• overall dimensions.

2 Delivery and site handling2.1 Conservatory roofs are prefabricated in theUltraframe factory. Components/assemblies aremarked and numbered to assist assembly. Allcomponents are suitably protected and delivered tosite (see Figure 9).

Figure 9 Uzone roof boxed and film protected

2.2 The conservatory roof has a label bearing thecompany’s mark and the BBA identification markincorporating the number of this Certificate.

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2.3 The roof components should be stored undercover in a clean area and suitably protected toavoid distortion or damage.

2.4 The weight of glazing can be calculated,where required for manual handling operations, byreference to the information contained inBS 952-1 : 1995. The weight of the unglazedframe, and its ease of handling, particularly by oneperson, must also be taken into account whenplanning site operations.

2.5 When selecting means of access, forexample, use of scaffolding, the safety of theoperatives, the occupants, and the passers-by,during the period of installation, should beconsidered.

Design Data

3 Weathertightness3.1 Selected samples from the Ultraframe UzoneVictorian/Georgian Conservatory Roof Systemconfigurations covered by this Certificate weretested for weathertightness. There are no standardsor guides applicable to conservatory roofs.Therefore, for the assessment, use was made ofBS 6375-1 : 1989 and MOAT No 1 : 1974giving the results shown in Table 1. The gradingsare based on the assumption that the conservatoryis installed in accordance with the Ultraframetechnical manuals.

Table 1 Weathertightness(1)

BS 6375-1 MOAT No 1Test pressure class Grading(2)

(Pa)

Watertightness 300 E3

(1) A value for air permeability is not given as it will vary depending onthe nature of the supporting walling structure.

(2) E3 indicates water leakage occurring between 300 Pa and 499 Pa.

3.2 To achieve the gradings given in Table 1,particular attention must be paid to the correctfitting of all gaskets and weatherseals, and to thedetailing of sealants and flashings.

3.3 The stack vent at the finial will help toequalise the internal and external air pressures.

4 Behaviour in relation to fire4.1 The polycarbonate sheet used in theconservatory roof has achieved a Class 1 ratingwhen tested to BS 476-7 : 1987 and is thereforeclassed as a TP(a) rigid thermoplastic. In Table 18of Approved Document B to the BuildingRegulations 2000 (as amended) (England andWales) TP(a) rigid thermoplastics are allowed to beused in conservatory roofs.

4.2 The spread of flame across PVC-U is limited,and in a fire it will tend to char and may fall away.The use of the material in the construction of a

conservatory roof would not accelerate thedevelopment of a fire.

5 Condensation risk and thermal insulation5.1 In common with all glazed roofstructures, temperature reduction under night-time winter sky radiation conditions will lead

to the possibility of condensation. However, theeffects may be minimised by the stack vent at thefinial or window ventilator and by the use ofbackground heating to maintain the internaltemperature at least 3°C above the externalambient temperature during winter night-time clearsky conditions. In general, if temperatures andhumidities within the conservatory are maintainedwithin the normal domestic band from 10°C and25°C and from 40% to 65% RH, respectively, anyoccurrence of condensation will be slight andtemporary.

5.2 The U value of the 16 mm triple wallpolycarbonate roof sheet is calculated to be2.4 Wm–2K–1 and the U value of the 25 mm fivewall polycarbonate roof sheets is calculated to be1.6 Wm–2K–1. A typical 3 m by 3 m three bayVictorian roof incorporating these roof sheets wouldhave an estimated overall U value of 2.4 Wm–2K–1

or 1.7 Wm–2K–1, respectively. Similarly a typical3 m by 3 m Georgian roof would have anestimated U value of 2.4 Wm–2K–1 or 1.8 Wm–2K–1

respectively. These values include, in accordancewith BS EN ISO 10077-2 : 2003, the effect ofglazing bars, ridge beams, eaves beams and theinteraction between the glazing and theaforementioned components.

6 Safety6.1 The positioning of the hand-operated controlof the opening vent will comply with therecommendations of BS 8213-1 : 2004.

6.2 A security clip is fitted to Invertabarsleeve/top cap, to prevent inopportune removal.

7 Supporting structureAll supporting side frames incorporating windowprofile material, ie PVC, timber or aluminium, shouldbe designed in accordance with the relevant BritishStandards for imposed loadings. The side frames/walls must provide conservatories with overalllateral stability and resistance to axial loading.

8 Durability8.1 Evidence is available on the performance inthe UK of PVC-U similar to that used for the internaland external cladding, over a period of 15 yearsin windows and in excess of 20 years in otherexternal applications. Such evidence, whencompared with the results of tests on the UltraframePVC-U, indicates that the conservatory roof willhave a life of at least 25 years. Slight colour

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change or surface dulling may occur within theoverall life of the roof.

8.2 Polycarbonate roof sheets, aluminium glazingbars and other components, including the roof venthinges, and locking mechanism, will have similardurability. Where conservatory roofs are to beinstalled in areas subject to particularly aggressiveconditions, for example, in coastal locations ornear sources of industrial pollutants, replacementof components may be necessary within the life ofthe conservatory roof. Polycarbonate roof sheetreplacement may be necessary where prolongedexposure to direct sunlight causes degradation.

8.3 The gaskets and silicone sealant may need tobe replaced within the life of the conservatory roof.

Installation

9 Procedure9.1 The installation of the Ultraframe UzoneVictorian/Georgian Conservatory Roof System isdetailed in the Certificate holder’s installationinstructions. The following sections give a briefexplanation on the fitting of the roof.

9.2 The eaves beam assembly is positioned ontop and in line with the supporting side frames andtemporarily secured with screws. The eaves beamcorners are connected with structural cornerconnectors and fixing screws.

9.3 The rear starter bars are placed in position onthe eaves beam and a die-cast ridge mounting wallplate is located into each starter bar and securedwith screws. The starter bars are connected to theeaves connection bracket with screws and the barsare connected to the house wall using appropriatefixings. A fixing kit is available as an ancillary item.

9.4 The ridge beam assembly is placed inposition on the ridge mounting wall plate andlocated with the hip transom bar assemblies whichare clicked into position at the ridge hub end andthe eaves beam.

9.5 The ridge is finally secured to the ridgemounting wall plate and the eaves beam ispermanently fixed with screws.

9.6 Starter bar PVC-U sleeves and all internalfascia trims and claddings are positioned. The

gutter is fixed around the eaves beam using push-fitPVC-U bracket, with downpipes fitted to divertrainwater to a suitable soakaway or drain.

9.7 The roof is glazed with polycarbonate sheets.Each panel is located into the ridge systembetween a PVC-U rain baffle and co-extruded TPEgaskets. External glazing caps, with co-extrudedTPE gaskets, are snapped onto the glazing bars toform a seal against the glazing panel. Securityclips are then fitted to top cap Invertabar sleeves ateaves level.

9.8 Conservaflash or traditional lead flashing isfitted at the abutment of the roof to the house wall.

9.9 A weathering tray is silicone sealed to theridge hub and the roof installation is completed byfitting such items as the ridge capping, cresting,finial, glazing bar end caps, internal claddingsand trims.

Technical Investigations

The following is a summary of the technicalinvestigations carried out on the Ultraframe UzoneVictorian/Georgian Conservatory Roof System.

10 TestsTests were carried out to determine:• watertightness• effect of wind loads• effect of snow loads• suitability of materials.

11 Investigations11.1 The manufacturer’s design procedures wereexamined for compliance with:• BS 6399-2 : 1997• BS 6399-3 : 1988• BS 8118-1 : 1991• BS 8118-2 : 1991.

11.2 Predictions of structural performance werecompared to those obtained from full-scale testing.

11.3 An assessment in relation to thermaltransmittance of Uzone roof components wasconducted in accordance with BS EN ISO 10077-2 :2003.

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Bibliography

BS 476-7 : 1987 Fire tests on building materialsand structures — Method for classification of thesurface spread of flame of products

BS 952-1 : 1995 Glass for glazing — Classification

BS 1474 : 1987 Specification for wroughtaluminium and aluminium alloys for generalengineering purposes: bars, extruded round tubesand sections

BS 6375-1 : 1989 Performance of windows —Classification for weathertightness (includingguidance on selection and specification)

BS 6399-2 : 1997 Loading for buildings — Codeof practice for wind loadsBS 6399-3 : 1988 Loading for buildings — Codeof practice for imposed roof loads

BS 8118-1 : 1991 Structural use of aluminium —Code of practice for design

BS 8118-2 : 1991 Structural use of aluminium —Specification for materials, workmanship andprotection

BS 8213-1 : 2004 Windows, doors androoflights — Design for safety in use and duringcleaning of windows, including door-heightwindows and roof windows — Code of practice

BS EN 755-2 : 1997 Aluminium and aluminiumalloys — Extruded rod/bar, tube and profiles —Mechanical properties

BS EN 10326 : 2004 Continuously hot-dipcoated strip and sheet of structural steels —Technical delivery conditions

BS EN ISO 10077-2 : 2003 Thermal performanceof windows, doors and shutters — Calculation ofthermal transmittance — Numerical method forframes

MOAT No 1 : 1974 Directive for the Assessmentof Windows

7

On behalf of the British Board of Agrément

Date of Second issue: 14th March 2005 Chief Executive

*Original Detail Sheet issued 29th September 2003 (but not printed). This amended version includes new crossreferencing to the Scottish Building Standards on Condensation risk and thermal insulation and a revised Bibliography.

Electronic Copy

British Board of AgrémentP O Box No 195, Bucknalls LaneGarston, Watford, Herts WD25 9BAFax: 01923 665301

©2005For technical or additional information,contact the Certificate holder (seefront page).For information about the AgrémentCertificate, including validity andscope, tel: Hotline 01923 665400,or check the BBA website.

e-mail: mail@bba.star.co.ukwebsite: www.bbacerts.co.uk

Electronic Copy

Readers are advised to check the validity of this Detail Sheet by either referring to the BBA’s website (www.bbacerts.co.uk) or contactingthe BBA direct (Telephone Hotline 01923 665400).

• THIS DETAIL SHEET RELATES TO THEULTRAFRAME UZONE ELEVATION(1)

CONSERVATORY ROOF SYSTEM.

This Detail Sheet must be read in conjunction with theFront Sheets, which give the product’s position regardingthe Building Regulations, general information relating tothe system, and the Conditions of Certification,respectively.(1) Trademark of Ultraframe (UK) Ltd.

Technical Specification

1 Description1.1 The Ultraframe Uzone Elevation ConservatoryRoof System is designed and fabricated byUltraframe (UK) Ltd for use in the exposureconditions described in this Certificate.

1.2 The PVC-U roof system is of aluminiumconstruction with polycarbonate glazing panelsretained by a top capping available in white orwoodgrain foiled light oak and rosewood. Internaland external cladding is PVC-U in white orwoodgrain foiled as appropriate. The roof isavailable in lean-to configuration with pitch anglesvarying from 2.5° to 10° or in a hippedconfiguration with 5° pitch angle (see Figure 1).

Certificate No 03/4039

DETAIL SHEET 3Ultraframe (UK) Ltd

THE ULTRAFRAME UZONE ELEVATIONCONSERVATORY ROOF SYSTEM

Product

CI/SfB

996

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Figure 1 Conservatory roofs

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Standard roof One piece hipped roof

1.3 Uzone Elevation roofs are designed to amaximum projection of 4.8 m projection in lean-toconfiguration and 4.35 m projection as a hippedroof with uniform bar centres. Within these sizes,permissible bar centres and loadings for theavailable configurations are described in theUltraframe technical manuals. This Certificaterelates to roofs used on conservatories notexceeding these parameters.

1.4 The full specifications and drawings for thematerials and components covered by this Certificate

have been examined and are retained by the BBA.This section gives only general details of the system.A complete schedule of the component parts iscontained in the Ultraframe technical manuals.

1.5 The Uzone Elevation roof adopts a Clicklockconnection technology similar to the main Uzoneproduct (see Figure 2). All claddings andaluminium sections are pre-fabricated. The majorityof claddings and thermal sleeves are also pre-fitted,to reduce on-site installation time.

Figure 2 Clicklock feature

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1.6 The roof system consists of the followingcomponents supplied to site in assemblies/items:Glazing bar assembly• glazing bar section extruded from aluminium

grade 6063-T6 to BS 1474 : 1987(1), fittedwith PVC-U sleeve and integral co-extrudedgaskets. The bar is also fitted with proprietaryClicklock structural composite mouldings at eachend. Where applicable, a reinforcing insert fromgalvanized steel grade DX51 D+Z toBS EN 10327 : 2004 and BS EN 10143 :1993.

(1) Mechanical properties of this alloy type are defined inBS EN 755-2 : 1997.

Roof panels• polycarbonate roof panels, 25 mm or 35 mm

thick, supplied with PVC-U end trims with integralco-extruded gaskets.

Wall plate• wall plate extruded from aluminium

grade 6063-T6 to BS 1474 : 1987 fitted withPVC-U top cap, baffle, undercladding andinternal fascia cladding; PVC-U glazing supporttrim with integral foam tape and compositestructural quarter hubs at each end (hipped roof).See Figure 3.

Starter bar assembly• starter bar extruded from aluminium

grade 6063-T6 to BS 1474 : 1987 fitted withPVC-U starter bar sleeve with integral soaker and

top cap and starter bar to eaves mouldedconnector.

Eaves beam assembly• eaves beam extruded from aluminium

grade 6063-T6 to BS 1474 : 1987 fitted withPVC-U internal and external cladding, PVC-Uglazing support trim with integral foam tape,PVC-U internal trim and a composite structuralcorner moulding (hipped roof). See Figure 4.

Figure 4 Corner connection detail for hipped roof

One-piece hipped wing support• for hipped roofs the eaves beam for left and

right sides is fitted with PVC-U glazing supportwith its own PVC-U top cap and integral foamtape (see Figure 5).

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Figure 3 Wall plate/starter bar/quarter hub

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Figure 5 View on corner of one piece hipped roof

Ancillary items• roof vent — an opening roof vent designed to fit

between the glazing bars is available if required(see Figure 6).

Figure 6 Roof vent

• Conservaflash(1) — a PVC-U flashing system isavailable as an alternative to traditional leadflashing.

(1) Trademark of Ultraframe (UK) Ltd.

1.7 The aluminium eaves beam assembly is fixedto the supporting side frame structure with zinc-plated screws.

1.8 Wall plate assemblies are fixed directly to theexisting building using appropriate fixings. For theone-piece hipped wings, starter bars are attachedto the eaves and wall plates with proprietarymouldings — a quarter hub structural moulding atthe top and a starter bar to eaves connector at thelower end. The starter bars are also fixed directly tothe existing building wall.

1.9 Glazing bar assemblies are attached to theeaves and wall plate assemblies with Clicklocks.Wall plates and starter bars are fixed directly to theexisting building using appropriate fixings.

1.10 The hip glazing bar member is the same asthe other glazing bars. In this case the Clicklockfittings at each end engage with the quarter hubstructural moulding at the top and the 90° cornerstructural moulding at the lower end.

1.11 Glazing panels supported by the glazingbars are located into the wall plate system througha PVC-U rain baffle. This, along with a Rainguardtape on the glazing panel leading edge, providesa seal against ingress of moisture. External PVC-Ucaps with co-extruded gaskets snap into position onthe glazing bar sleeves and hold down the roofpanels, forming a seal between the internal andexternal gaskets.

1.12 Security clips are then fitted to top caps/sleeves to prevent any possibility of top capremoval.

1.13 To prevent the ingress of moistureweathering trays are fitted at quarter hub locationsand silicone sealant is applied to dedicatedchannels. In the case of the standard lean-to roofthe ends of the wall plate are fitted with end capsto maintain weathertightness.

Figure 7 Weathering tray over quarter hub

1.14 A PVC gutter system is attached to the eavesbeam PVC-U external cladding around the fullperimeter of the roof using push-fit brackets. Theinternal face of the eaves beam is clad with aninternal PVC cladding and all cover mouldings,both at eaves and wall plate, are then fitted.

1.15 Quality control includes checks on allmaterials and components, in particular:• extruded PVC-U profiles• structural composite components• glazing bar assembly• eaves beam assembly• wall plate assembly• extrusions and components (visual inspection)• overall dimensions.

2 Delivery and site handling2.1 Conservatory roofs are prefabricated in theUltraframe factory. Components/assemblies aremarked and numbered to assist assembly. Allcomponents are suitably protected and delivered tosite (see Figure 8).

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Figure 8 Uzone Elevation roof boxed and filmprotected

2.2 The conservatory roof has a label bearing thecompany’s mark and the BBA identification markincorporating the number of this Certificate.

2.3 The roof components should be stored undercover in a clean area and suitably protected toavoid distortion or damage.

2.4 The weight of glazing can be calculated,where required for manual handling operations,by reference to the information contained inBS 952-1 : 1995. The weight of the unglazedframe, and its ease of handling, particularly byone person, must also be taken into account whenplanning site operations.

2.5 When selecting means of access, for example,use of scaffolding, the safety of the operatives, theoccupants, and the passers-by, during the period ofinstallation, should be considered.

Design Data

3 Weathertightness3.1 Selected samples from the Ultraframe UzoneElevation Conservatory Roof System configurationscovered by this Certificate were tested forweathertightness. There are no standards or guidesapplicable to conservatory roofs. Therefore, for theassessment, use was made of BS 6375-1 : 1989and MOAT No 1 : 1974 giving the results shownin Table 1. The gradings are based on theassumption that the conservatory is installed inaccordance with the Ultraframe technical manuals.

3.2 To achieve the gradings given in Table 1,particular attention must be paid to the correctfitting of all gaskets and weatherseals, and to thedetailing of sealants and flashings.

3.3 The trickle vents will help to equalise theinternal and external air pressures.

Table 1 Weathertightness

BS 6375-1 MOAT No 1Test pressure class Grading(1)(2)

(Pa)

Watertightnessconservatory roof 300 E3conservatory roof withroof light fitted 100 E1

(1) E1 indicates water leakage occurring between 50 Pa and 150 Pa.(2) E3 indicates water leakage occurring between 300 Pa and 499 Pa.

Note: A value for air permeability is not given as it will vary depending onthe nature of the supporting walling structure.

4 Behaviour in relation to fire4.1 The polycarbonate sheet used in theconservatory roof has achieved a Class 1 ratingwhen tested to BS 476-7 : 1987 and is thereforeclassed as a TP(a) rigid thermoplastic. In Table 18of Approved Document B to the BuildingRegulations 2000 (as amended) (England andWales) TP(a) rigid thermoplastics are allowed to beused in conservatory roofs.

4.2 The spread of flame across PVC-U is limited,and in a fire it will tend to char and may fall away.The use of the material in the construction of aconservatory roof would not accelerate thedevelopment of a fire.

5 Condensation risk and thermal insulation5.1 In common with all glazed roofstructures, temperature reduction under night-time winter sky radiation conditions will lead

to the possibility of condensation. However, theeffects may be minimised by the trickle vent at thewallplate and eaves positions and by the use ofbackground heating to maintain the internaltemperature at least 3°C above the externalambient temperature during winter night-time clearsky conditions. In general, if temperatures andhumidities within the conservatory are maintainedwithin the normal domestic band from 10°C and25°C and from 40% to 65% RH, respectively, anyoccurrence of condensation will be slight andtemporary.

5.2 The U value of the 25 mm structured wallpolycarbonate roof sheet is estimated to be1.7 Wm–2K–1 and the U value of the 35 mmstructured polycarbonate roof sheets is estimated tobe 1.5 Wm–2K–1. A typical 3 m by 3 m lean-toroof with a 5° pitch incorporating these roof sheetswould have an estimated overall U value of1.8 Wm–2K–1 or 1.5 Wm–2K–1, respectively. Thesevalues include the effect of glazing bars, wallplates, eaves beams, side firrings and theinteraction between the glazing and theaforementioned components.

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6 Safety6.1 The positioning of the hand-operated controlof the opening vent will comply with therecommendations of BS 8213-1 : 2004.

6.2 A security clip is fitted to top caps/sleeves toprevent inopportune removal.

7 Supporting structureAll supporting side frames incorporating windowprofile material, ie PVC, timber or aluminium,should be designed in accordance with therelevant British Standards for imposed loadings.The side frames/walls must provide conservatorieswith overall lateral stability and resistance to axialloading.

8 Durability8.1 Evidence is available on the performance inthe UK of PVC-U similar to that used for the internaland external cladding, over a period of 15 yearsin windows and in excess of 20 years in otherexternal applications. Such evidence, whencompared with the results of tests on the UltraframePVC-U, indicates that the conservatory roof willhave a life of at least 25 years. Slight colourchange or surface dulling may occur within theoverall life of the roof.

8.2 Polycarbonate roof sheets, aluminium glazingbars and other components, including the roof venthinges, and locking mechanism, will have similardurability. Where conservatory roofs are to beinstalled in areas subject to particularly aggressiveconditions, for example, in coastal locations ornear sources of industrial pollutants, replacementof components may be necessary within the life ofthe conservatory roof. Polycarbonate roof sheetreplacement may be necessary where prolongedexposure to direct sunlight causes degradation.

8.3 The gaskets and silicone sealant may need tobe replaced within the life of the conservatory roof.

8.4 Solar heat gain will lead to higher surfacetemperatures for woodgrain finish roofs incomparison to the white finish. The actual externaltemperature reached will be dependent upon anumber of factors including:• orientation — south facing and ‘sun-trap’

locations with restricted air movement• dark woodgrain finishes will reach a higher

temperature than lighter shades• shading by trees or other buildings.

8.5 In extreme cases, failure to consider thesefactors at the survey stage can lead to thermaldistortion of capping profiles. For further guidancethe Certificate holder should be contacted.

Installation

9 Procedure9.1 The installation of the Ultraframe UzoneElevation Conservatory Roof System is detailed inthe Certificate holder’s installation guide. Thefollowing sections give a brief summary of theinstallation of the roof.

9.2 For the standard lean-to configuration, thefirring assemblies including the PVC-U firringglazing support are first fixed to the side frames.

9.3 The eaves beam assembly is positioned onthe top and in line with the supporting side framesand secured with screws. The eaves beam cornersare connected with structural corner mouldings (onepiece hipped roof).

9.4 The wall plate and starter bars (one piecehipped roof) are the next items to be installed —these are fixed direct to the existing building wallas detailed in the installation guide.

9.5 Glazing bar assemblies are then clicked intoplace including the hip members where applicable.

9.6 The flashings (Conservaflash if selected) arefitted along with the guttering. The gutter is fixedaround the eaves beam using push-fit PVC-Ubrackets, with downpipes fitted to carry rainwaterto a suitable soakaway or drain.

9.7 The roof is glazed with 25 mm or 35 mmthick, polycarbonate sheets. Each panel is locatedinto the wall plate system between the rain baffleand glazing support trim. External glazing caps,with co-extruded TPE gaskets, are snapped ontothe glazing bars to form a seal against the glazingpanels and securely hold them in place.

9.8 Weathering trays and other items such asglazing bar end caps and internal trims thencomplete the roof installation.

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Technical Investigations

The following is a summary of the technicalinvestigations carried out on the Ultraframe UzoneElevation Conservatory Roof System.

10 TestsTests were carried out to determine:• watertightness (rain and wind)• effect of wind loads• effect of snow loads• suitability of materials• effects of heating due to solar radiation.

11 Investigations11.1 The manufacturer’s design procedures wereexamined for compliance with:• BS 6399-2 : 1997• BS 6399-3 : 1988• BS 8118-1 : 1991• BS 8118-2 : 1991.

11.2 Predictions of structural performance werecompared to those obtained from full-scale testing.

11.3 An assessment in relation to thermaltransmittance of Uzone roof components wasconducted in accordance with BS EN ISO 10077-2 :2003.

Bibliography

BS 476-7 : 1987 Fire tests on building materialsand structures — Method for classification of thesurface spread of flame of products

BS 952-1 : 1995 Glass for glazing — Classification

BS 1474 : 1987 Specification for wroughtaluminium and aluminium alloys for generalengineering purposes: bars, extruded round tubesand sections

BS 6375-1 : 1989 Performance of windows —Classification for weathertightness (includingguidance on selection and specification)

BS 6399-2 : 1997 Loading for buildings — Codeof practice for wind loadsBS 6399-3 : 1988 Loading for buildings — Codeof practice for imposed roof loads

BS 8118-1 : 1991 Structural use of aluminium —Code of practice for designBS 8118-2 : 1991 Structural use of aluminium —Specification for materials, workmanship andprotection

BS 8213-1 : 2004 Windows, doors androoflights — Design for safety in use and duringcleaning of windows, including door-heightwindows and roof windows — Code of practiceBS EN 755-2 : 1997 Aluminium and aluminiumalloys — Extruded rod/bar, tube and profiles —Mechanical properties

BS EN 10143 : 1993 Continuously hot-dip metalcoated steel sheet and strip — Tolerances ondimensions and shape

BS EN 10327 : 2004 Continuously hot-dipcoated strip and sheet of low carbon steels for coldforming — Technical delivery conditions

BS EN ISO 10077-2 : 2003 Thermal performanceof windows, doors and shutters — Calculation ofthermal transmittance — Numerical method forframes

MOAT No 1 : 1974 Directive for the Assessmentof Windows

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On behalf of the British Board of Agrément

Date of issue: 14th March 2005 Chief Executive

British Board of AgrémentP O Box No 195, Bucknalls LaneGarston, Watford, Herts WD25 9BAFax: 01923 665301

©2005For technical or additional information,contact the Certificate holder (seefront page).For information about the AgrémentCertificate, including validity andscope, tel: Hotline 01923 665400,or check the BBA website.

e-mail: mail@bba.star.co.ukwebsite: www.bbacerts.co.uk

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