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Sound insulation solutions Guide to meeting the Code for Sustainable Homes; Health and Wellbeing
Sound insulation solutionsGuide tomeeting the Code for SustainableHomes; Health andWellbeing
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ContentsBackground
An introduction to the Code forSustainable Homes
Mandatory ratings
How the Codeworks
Weightings, credits andpercentage points
Health andwellbeing
British Gypsum enhanced soundinsulating solutions
Twin frame steel separatingwalls
Single frame steel separatingwalls
Timber frame separatingwalls
Masonry separatingwalls
Separating floors
Front Cover Image: Berkeley Homes, Royal Arsenal, Woolwich
Contents Page Images: Courtesy of TaylorWimpey
Background An introduction to the Code for Sustainable Homes
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The Code for Sustainable Homes (the Code) has been introduced to drive a step-change in sustainable home buildingpractice in England. It is a means of driving continuous improvement, greater innovation and exemplary achievementin sustainable home building.
The Code is a standard for key elements of design and construction which affect the sustainability of a new home. It isthe single national standard for sustainable homes, used by home designers and builders as a guide to development,and by home-buyers to assist in their choice of home.
The Code measures the sustainability of a home against design categories, rating the ‘whole home’ as a completepackage.
The sustainability categories included within the Code are:
Energy and CO2 emissions
Water
Materials
Surfacewater run-off
Waste
Pollution
Health andwellbeing
Management
Ecology
The Code uses a sustainability rating system, indicated by ‘stars’, to communicate the overall sustainabilityperformance of a home. A home can achieve a sustainability rating from one star (�) to six stars (������)depending on the extent to which it has achieved Code standards. One star is the entry level, above the level of theBuilding Regulations, and six stars is the highest level, reflecting exemplary development in sustainability terms.
Mandatory ratings
On the 1st May 2008, a rating against the Code for new build homes in England became mandatory. This mandatoryrequirement came into effect for all developments where a local authority received a building notice, initial notice orfull plans application after the 1st May.
However, this new requirement does not make it mandatory to build a Code home or to have each new homeassessed against the Code. It does, however, mean that all buyers of new homes must be given clear informationabout the sustainability of the new home.
A house builder can do this in one of two ways:
They can chose to build a Code home, have that home assessed against the Code and provide the home buyer with aCode certificate stating the star rating the home has achieved
or
They can choose to build a home to current building regulations standards, not to pay for an assessment and insteaddownload a free nil-rated certificate of non-assessment (also referred to as a nil-rating) to provide to the home buyer.
In England andWales Code level 3 is required for all government funded social housing.
The Code does not apply in Scotland.
Background
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How the Code works
The Code for Sustainable Homes is an environmental assessment rating method for new homes in England that:
Identifies a set of issues that are known to impact on the environment
Establishes performancemeasures that:
- are known to reduce environmental impacts.- exceed the requirements of legislation and regulations.- can be objectively assessed, evaluated and delivered in a practical and cost effective way by the construction industry.Identifies environmental issues for whichmandatoryminimumperformancemust be achieved in order to gain a Code rating.
Assesses environmental performance in a two stage process (design stage and post construction) using objective criteria andverification.
Records results of the Code assessment on a certificate assigned to the dwelling.
Weightings, credits and percentage points
The table below shows how weightings are applied across all Code categories of environmental impact to adjustthe relative values of credits within different categories.
Within each category credits are awarded for achieving specified degrees of performance.
The weighting factors show the contribution made by each category to the total performance recognised and rewarded bythe Code. The total available contribution is expressed as 100%. The weighting of each category is expressed as a fraction ofthis, such that the sum of all the category contributions equals 100%.
As an example, the 12 credits available for Health andWellbeing contribute to 14% of the total available performance.
Categories of Total credits Weighting factorenvironmental in each category (% points contribution)impact
Energy and CO2 emissions 29 36.4%Water 6 9.0%Materials 24 7.2%Surface water run-off 4 2.2%Waste 7 6.4%Pollution 4 2.8%Health and wellbeing 12 14.0%Management 9 10.0%Ecology 9 12.0%
Total - 100.0%
www.british-gypsum.comDrywall Academy Tel: 08705 456 123
British Gypsum can help home builders achieve Code credits in the categories of energy and CO2 emissions, materials,waste, pollution and health and wellbeing . This document details how British Gypsum solutions can gain credits for homebuilders under the health and wellbeing section, when enhanced sound insulating systems are specified.
Background Health and wellbeing
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Sustainable homes can also provide us with improved overall wellbeing and quality of life.
The health and wellbeing category within the Code for Sustainable Homes encourages higher standards of soundinsulation in order to reduce the likelihood of noise complaints from neighbours. One of the most common causes fordisputes between neighbours is noise. Environmental Health Officers in England andWales received nearly 6000 noisecomplaints per million people from domestic premises in 2003/2004. This accounts for 75% of all noise complaintsreceived.
Credits are awarded for achieving higher standards of sound insulation than those given in the Building RegulationsApproved Document E and demonstrating it by either using Pre-Completion Testing or Robust Details.
Criteria Credits awarded
Where:
Airborne sound insulation values are at least 3dB higher
Impact sound insulation values are at least 3dB lower
or
Airborne sound insulation values are at least 5dB higher
Impact sound insulation values are at least 5dB lower
or
Airborne sound insulation values are at least 8dB higher
Impact sound insulation values are at least 8dB lower
than the performance standards set out in the Building Regulationsfor England andWales, Approved Document E.
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1 credit
3 credits
4 credits
4 credits
3 credits
The criteria is demonstrated through either a programme of pre-completion testing based on the normal programme oftesting described in the Building Regulations Approved Document E or use of constructions for all relevant buildingelements that have been assessed and approved by Robust Details Limited and found to achieve the performancestandards stated above. All relevant dwellings must be registered with Robust Details Limited prior to construction.
Default cases
Detached dwellings
Attached dwellings where separating walls or floors onlyoccur between non-habitable rooms.
BackgroundBritish Gypsum enhanced sound insulating solutions
British Gypsum provides a range of masonry, timber and steel solutions that have the potential to achieve higher soundinsulating performance than the standards set out in Approved Document E.
When specifying these elements, as detailed in the following pages, British Gypsum can help home builders achieve creditstowards the Code level required.
A Code level is awarded on the basis of achieving both a set of mandatory minimum standards and a minimum overallscore.
The number of credits achieved is divided by the total available and multiplied by the category weighting factor to give apercentage points score for the category. The percentage points scores for each category are then summed to arrive at thetotal percentage points score for the dwelling.
The Code level is derived from the total points achieved. The relationship between total percentage points score and Codelevel is shown below;
The systems shown on the following pages have the potential to achieve the number of credits stated, equivalent to up to3.5 points, provided they are built correctly. For separating wall and floor constructions to be fully effective, care must betaken to correctly detail the junctions between the separating wall or floor and associated elements such as external walls,other separating elements and penetrations or door openings. If junctions are incorrectly detailed then the acousticperformance will be limited and the credit requirements will not be achieved in practice.
The number of credits awarded to a dwelling is determined by the lowest performing separating wall or floor, regardless ofwhether the assessment is based on Pre-Completion Testing, use of Robust Details, or a mixture of both.
The dwellings in a group or sub-group that have been tested are awarded credits appropriate to their measuredperformance. Other dwellings in the group, or sub-group, that were not tested are awarded the same number of credits asthe lowest performing separating walls or floors in the same group or sub-group that was tested.
Robust Details Limited publish and update a table of constructions that meet the Code criteria. However, it should be notedthat not all Robust Details will necessarily achieve the performance levels required for Code credits. The award of credits toRobust Detail constructions is subject to review and revision, and therefore specifiers are advised to review the informationat www.robustdetails.com. Developers using Robust Details will not have to conduct additional Pre-Completion Testing toachieve Code credits.
Code levels Total percentage points score(equal to or greater than)
Level 1 (�) 36 pointsLevel 2 (��) 48 pointsLevel 3 (���) 57 pointsLevel 4 (����) 68 pointsLevel 5 (�����) 84 pointsLevel 6 (������) 90 points
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Twinframesteelseparatingwalls Twin frame steel separating walls
Table 1 - Twin frame steel separating walls to satisfy the requirements ofBS EN 1364-1: 1999 and BS 476: Part 22: 1987
LIF
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IME
S Y S T E M W
AR
RA
NT
Y
SPECSURE
BSEN
-Detail Partition Board Lining Stud Max height Insulation Airborne sound Potential Duty System
thickness type thickness mm insulation code rating reference
mm mm mm EN BS mm Rw (Rw + Ctr) credits
dB
90 minutes fire resistance EN BS
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GypWall QUIET IWLTwo layers of board fixed to the outside faces of two
Gypframe 48 I 50 stud I stud frameworks with studs at600mm centres. 50mm Isover APR 1200 in the cavity
(cavity width 140mm). Linings as in table.
GypWall QUIET IWLTwo layers of board fixed to the outside faces of two
Gypframe 60 I 50 stud I stud frameworks with studs at600mm centres. 100mm Isover APR 1200 in the cavity (cavity
width 190mm). Linings as in table.
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GypWall QUIETTwo layers of board fixed to the outside faces of two
Gypframe 48 S 50 C stud frameworks studs at braced at max
1200mm centres. 75mm Isover Acoustic High Performance
Slabs in the cavity (cavity width 190mm). Linings as in table.
GypWall QUIETTwo layers of board fixed to the outside faces of two
Gypframe 48 S 50 C stud frameworks braced at max 1200mm
centres. 100mm Isover APR 1200 in the cavity (cavity width
190mm). Linings as in table.
200 SoundBloc 2 x 15 48 2800 2800 50 66 (58) 1 Severe A216014
250 SoundBloc 2 x 15 48 5000 7500 75 63 (57) 1 Severe A216011
300 SoundBloc 2 x 15 48 5000 7500 100 64 (58) 1 Severe A216012
250 SoundBloc 2 x 15 60 3300 3300 100 70 (62) 3 Severe A216013
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SingleframesteelseparatingwallsSingle frame steel separating walls
Table 2 - Single frame steel separating walls to satisfy the requirements ofBS EN 1364-1: 1999 and BS 476: Part 22: 1987
LIF
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IME
S Y S T E M W
AR
RA
NT
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SPECSURE
BSEN
Detail Partition Board Lining Stud Max height Insulation Airborne sound Potential Duty System
thickness type thickness mm insulation code rating reference
mm mm mm EN BS mm Rw (Rw + Ctr) credits
dB
90 minutes fire resistance EN BS
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GypWall CLASSICTwo layers of board fixed to Gypframe 146 AS 50
Acoustuds at 600mm centres, 150mm Isover APR 1200
(100mm + 50mm or 2 x 75mm) In the cavity.
Linings as in table.
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GypWall QUIET SFTwo layers of boards fixed to Gypframe ‘C’ Studs at 600mm
centres with Gypframe RB1 Resilient Bar at 600mm centres to
both sides. 50mm Isover APR 1200 in the cavity. Linings as in
table.
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GypWall QUIET SFTwo layers of boards fixed to Gypframe ‘C’ Studs at 600mm
centres with Gypframe RB1 Resilient Bar at 600mm centres to
one side. 50mm Isover APR 1200 in the cavity. Linings as in
table.
208 SoundBloc 2 x 15 146 4000 7900 150 61 (57) 1 Severe A206A255
224 SoundBloc 2 x 15 146 5000 6900 50 62 (57) 1 Severe A316017
164 SoundBloc 2 x 15 70 3200 3200 50 65 (57) 1 Severe A316013
240 SoundBloc 2 x 15 146 5000 5700 50 65 (59) 3 Severe A316019
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Timberframeseparatingwalls Timber frame separating walls
Table 3 - Timber frame separating walls to satisfy the requirements ofBS 476: Part 21: 1987 (Loadbearing)BS
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Detail Partition Board Lining Airborne Potential
thickness type thickness sound code
mm mm insulation credits
60 minutes fire resistance BS
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Robust Detail E-WT-1Two separate timber frames spaced a minimum of 50mm
apart. Two layers of board each side. 65mm Isover APR 1200 or
90mm Isover Frame Batt 32 between the studs in each timber
frame. Linings as in table.
Robust Detail E-WT-2Two separate timber frames, each sheathed with a 9mm
minimum thick board, spaced a minimum of 50mm apart.
Two layers of board each side. 65mm Isover APR 1200 or
90mm Isover Frame Batt 32 between the studs in each timber
frame. Linings as in table.
300 SoundBloc 2 x 15 Robust Detail E-WT-2 1
300 Plank and 19 + 12.5 Robust Detail E-WT-2 1WallBoard
300 SoundBloc 2 x 15 Robust Detail E-WT-1 3
300 Plank and 19 x 12.5 Robust Detail E-WT-1 3WallBoard
The award of credits to Robust Detail constructions is subject to review and revision, and therefore specifiers are advised to regularly review the
information at www.robustdetails.com
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MasonryseparatingwallsMasonry separating walls
Table 4 - Masonry separating walls
Detail Wall Block type Parge coat Lining Lining Airborne Potential
thickness kg/m3 thickness sound code
mm mm insulation credits
300 Aggregate N/A Thistle 13 Robust Detail E-WM-2 11350-1600 Plaster
336 Aggregate Gyproc WallBoard 12.5 Robust Detail E-WM-3 11850-2300 SoundCoat
336 Aggregate Gyproc WallBoard 12.5 Robust Detail E-WM-4 11350-1600 SoundCoat
336 Aircrete Sand/Cement WallBoard 12.5 Robust Detail E-WM-6 1600 - 800
320 Aggregate N/A WallBoard TEN 12.5 Robust Detail E-WM-8 11350-1600
320 Aggregate N/A SoundBloc 12.5 Robust Detail E-WM-8 11350-1600
325 Aggregate N/A WallBoard 15 Robust Detail E-WM-8 11350-1600
361 Aggregate Gyproc WallBoard 12.5 Robust Detail E-WM-11 31350-1600 SoundCoat
345 Aggregate N/A WallBoard TEN 12. 5 Robust Detail E-WM-14 31350-1600
345 Aggregate N/A SoundBloc 12. 5 Robust Detail E-WM-14 3
The award of credits to Robust Detail constructions is subject to review and revision, and therefore specifiers are advised to regularly review the
information at www.robustdetails.com
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Robust Detail E-WM-2, 3, 4 OR 6Block cavity wall comprising 100mm blocks with 75mm cavity.
Block and lining options as in table.
Robust Detail E-WM-11Block cavity wall comprising 100mm blocks with 100mm
cavity. Block and lining options as in table.
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Robust Detail E-WM-8Block cavity wall comprising 10mm blocks with 75mm cavity.
35mm Isover RD35 in the cavity. Block and lining options as in
table.
Robust Detail E-WM-14Block cavity wall comprising 10mm blocks with 100mm cavity.
35mm Isover RD35 in the cavity. Block and lining options as in
table.
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Separatingfloors Separating floors
Table 5 - Separating Floors LIFE
TIM
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S Y S T E M W
AR
RA
NT
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SPECSURE
Detail Board type Lining Airborne and impact Potential
thickness sound insulation code
mm credits
Plank and SoundBloc 19 + 12.5 Robust Detail E-FT-1 1
Plank andWallBoard TEN 19 + 12.5 Robust Detail E-FT-1 1
SoundBloc 2 x 15 Robust Detail E-FT-1 1
WallBoard TEN 12.5 Robust Detail E-FS-1 1
Plank and SoundBloc 19 + 12.5 Robust Detail E-FS-2 1
Plank andWallBoard TEN 19 + 12.5 Robust Detail E-FS-2 1
SoundBloc 2 x 15 Robust Detail E-FS-2 1
The award of credits to Robust Detail constructions is subject to review and revision, and therefore specifiers are advised to regularly review the
information at www.robustdetails.com
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Robust Detail E-FT-1A sub-deck of 15mmOSB and an RD approved floating floor
system. Minimum 240mm depth engineered timber I-joist.
100mm Isover APR 1200 in the joist cavity. Gypframe RB1
Resilient Bar ceiling. Ceiling linings as in table.
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Robust Detail E-FS-2A sub deck of 22mmwood based board and an RD approved
floating floor system. 225mmUltraBEAMmetal joists. 100mm
Isover APR 1200 in the joist cavity. Gypframe RB1 Resilient Bar
ceiling. Ceiling linings as in table.
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Robust Detail E-FS-1GypFloor SB floating floor system incorporating either 50mm
or 70mmGypframe Steel Battens. Minimum 80mm concrete
cover at shallowest point, minimum 130mm at deepest point
of metal deck In-situ concrete slab, minimum density of
2200kg/m3, supported on a profiled metal deck CasoLine MF
or GypLyner UNIVERSAL ceiling. Ceiling linings as in table.
NB
SeparatingfloorsSeparating floors
Table 6 - Separating Floors LIFE
TIM
E
S Y S T E M W
AR
RA
NT
Y
SPECSURE
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Detail Board type Lining Airborne and impact sound Potential System
thickness insulation code reference
Rw (Rw + Ctr) Lnw credits
dB
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GypFloor SB18mm chipboard and 1 layer of Gyproc Plank on Gypframe
70 S 65 Steel Battens. 25mm Isover APR 1200 in batten cavity.
25mm (min) screed applied directly to precast concrete
planks. CasoLine MF ceiling suspended from concrete planks to
create a 140mm cavity. Ceiling linings as in table.
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Robust Detail E-FC-103mmThermal Economics IsoRubber floor covering Minimum
175mm depth in-situ concrete floor slab, with minimum
density 2400kg/m3. CasoLine MF or GypLyner UNIVERSAL ceiling
set to a minimum of 150mm cavity depth. Ceiling linings as in
table.
WallBoard TEN 12.5 Robust Detail E-FC-10 1
SoundBloc 12.5 Robust Detail E-FC-10 1
SoundBloc 2 x 12.5 71 (61) 43 3 C100026
The award of credits to Robust Detail constructions is subject to review and revision, and therefore specifiers are advised to regularly review the
information at www.robustdetails.com
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Gyproc, Thistle, Gypframe, Glasroc and Arteco are all registered trade names of BPB United Kingdom Limited. Isover is a registered trade name of Saint-Gobain.
Proprietor: BPB United Kingdom Limited registered in England 734396, registered office Saint-Gobain House, Binley Business Park, Coventry CV3 2TT
British Gypsum reserves the right to revise product specifications without notice. The information in this document was correct to the best of our knowledge at the time of publication. It is the user’s responsibility to ensure that it remainscurrent prior to use.
The information in this document is for guidance only and should not be read in isolation. Users should read and familiarise themselves with all the information contained in this document and ensure that they are fully conversant withthe products and systems being used, before subsequent specification or installation.
For a comprehensive and up-to-date library of information visit the British Gypsumwebsite at: www.british-gypsum.com
Telephone: 08705 456123Fax: 08705 456356E-mail: [email protected]
Training enquiries: 08702 406040
www.british-gypsum.com
British Gypsum March 2009 3635-CSH-01
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