Internal walls and partitions

Transcription

1 Internal walls and partitions New-build and conversion For new-build and for new walls in material change of use (conversion), Building Regulations Approved Document E states that the following internal walls and partitions must meet the R w 40 db requirement: An internal wall between bedrooms An internal wall between a bathroom / WC and a habitable room An internal wall between bedrooms and any other room Where internal walls include a door, they are exempt from this requirement. Example systems GypWall CLASSIC Stud: Centres: Maximum height: Gypframe 70 S 50 C Studs 600mm 3600mm 12.5mm Gyproc SoundBloc (each side) R w 40 db 30 minutes fire resistance Timber stud Stud: Centres: Maximum height: Additional info: Non-loadbearing 63mm x 38mm timber 600mm 3600mm 15mm Gyproc SoundBloc (each side) Timber noggings may be required for structural support R w 40 db 30 minutes fire resistance The fire resistance and sound insulation performances are for imperforate (e.g. sealed and airtight) partitions, walls and ceilings incorporating boards with all joints taped and filled, or skimmed according to British Gypsum s recommendations. The quoted performances are achieved only if British Gypsum components are used throughout, and the Company s fixing recommendations are strictly observed. Any variation in the specifications should be checked with British Gypsum. Stockist

2 Wall construction: 100mm medium density concrete blocks (minimum 120kg / m 2 ) DriLyner BASIC DriLyner BASIC using Gyproc Dri-Wall Adhesive 15mm Gyproc SoundBloc (each side) R w 40 db 30 minutes fire resistance (dependent on base wall performance) For partitions that do not fall into the above criteria, for example a wall that includes a door, there is no requirement to improve the acoustic insulation, therefore 12.5mm Gyproc WallBoard can be used to line either side of the partition. To upgrade the acoustic insulation of existing masonry partitions, Gyproc Soundcoat Plus can be used to seal air paths before using DriLyner BASIC to dot and dab Gyproc SoundBloc to the walls. The fire resistance and sound insulation performances are for imperforate (e.g. sealed and airtight) partitions, walls and ceilings incorporating boards with all joints taped and filled, or skimmed according to British Gypsum s recommendations. The quoted performances are achieved only if British Gypsum components are used throughout, and the Company s fixing recommendations are strictly observed. Any variation in the specifications should be checked with British Gypsum. 2 Stockist-03-02

3 Internal floors New-build and conversion For new-build and new floors in material change of use (conversion), Building Regulations Approved Document E state that internal floors are required to meet R w 40 db. Fixing plasterboard directly into timber joists can result in nail or screw popping. Using Gypframe RB2 SureFix Bars in the construction of the ceiling can eliminate this problem, and help maintain the performance and the aesthetics of the ceiling. Example systems Solid timber joist (600mm centres) Flooring: Joists: 22mm tongue and groove chipboard flooring 195mm x 38mm solid joists at 600mm centres 12.5mm Gyproc SoundBloc R w 42 db 30 minutes fire resistance Solid timber joist (600mm centres) Flooring: Joists: 22mm tongue and groove chipboard flooring 195mm x 38mm solid joists at 600mm centres 15mm Gyproc WallBoard R w 40 db 30 minutes fire resistance The fire resistance and sound insulation performances are for imperforate (e.g. sealed and airtight) partitions, walls and ceilings incorporating boards with all joints taped and filled, or skimmed according to British Gypsum s recommendations. The quoted performances are achieved only if British Gypsum components are used throughout, and the Company s fixing recommendations are strictly observed. Any variation in the specifications should be checked with British Gypsum. Stockist

4 Solid timber joist (450mm centres) Flooring: Joists: Ceiling fixing: 22mm tongue and groove chipboard flooring 195mm x 38mm solid joists at 450mm centres Gypframe RB2 SureFix Bars 12.5mm Gyproc WallBoard R w 41 db 30 minutes fire resistance Intregral garage conversion When building an integral garage, the floor acts as a bridge between a heated and unheated space. Building Regulations require the floor and ceiling to meet 30 minutes fire resistance whilst also providing thermal insulation. The following system provides example guidance. Floor for integral garage Flooring: Joists: Insulation: 22mm tongue and groove chipboard flooring 195mm x 38mm solid joists at 600mm centres 200mm Isover Space Saver Roll 15mm Gyproc FireLine 30 minutes fire resistance U value 0.22 W / m 2 K The fire resistance and sound insulation performances are for imperforate (e.g. sealed and airtight) partitions, walls and ceilings incorporating boards with all joints taped and filled, or skimmed according to British Gypsum s recommendations. The quoted performances are achieved only if British Gypsum components are used throughout, and the Company s fixing recommendations are strictly observed. Any variation in the specifications should be checked with British Gypsum. 4 Stockist-03-02

5 Separating walls New-build When building new separating / party walls between dwellings Building Regulations Approved Document E states they are required to meet the 45 db D ntw + Ctr requirement. Example systems Lightweight aggregate blockwork with wet plaster Wall construction: Cavity: Lightweight aggregate cavity block wall (minimum 100mm blocks with a density between kg / m 3 ) Minimum 75mm cavity between blockwork 13mm Thistle plaster - undercoat and finish coat (each side) Robust Detail E-WM-2 meets the 45 db D ntw + Ctr requirement 60 minutes fire resistance (dependent on base wall performance) Lightweight aggregate blockwork with render and plasterboard Wall construction: Wall preparation: Lightweight aggregate cavity block wall (minimum 100mm blocks with a density between kg / m 3 ) 6mm Gyproc Soundcoat Plus (each side) DriLyner BASIC using Gyproc Dri-Wall Adhesive 12.5mm Gyproc WallBoard (each side) Robust Detail E-WM-4 meets the 45 db D ntw + Ctr requirement 30 minutes fire resistance (dependent on base wall performance) For separating wall and floor constructions to be fully effective, care must be taken 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, etc. The fire resistance and sound insulation performances are for imperforate (e.g. sealed and airtight) partitions, walls and ceilings incorporating boards with all joints taped and filled, or skimmed according to British Gypsum s recommendations. The quoted performances are achieved only if British Gypsum components are used throughout, and the Company s fixing recommendations are strictly observed. Any variation in the specifications should be checked with British Gypsum. Stockist

6 Conversion For material change of use / conversion of separating walls, Building Regulations state that they are required to meet the 43 db D ntw + Ctr requirement. Often upgrading existing separating walls can only be achieved from one side of the wall, therefore to reduce as much air leakage as possible, apply a 6-8mm coat of Gyproc Soundcoat Plus to the masonry wall prior to installation of a drylining system to increase its acoustic potential. Example systems Masonry wall with DriLyner SI Wall construction: Masonry wall such as brickwork (minimum 200kg / m 2 ) Additional info: DriLyner SI using Gyproc Dri-Wall Adhesive with Gyproc Nailable Plugs 52mm Gyproc TriLine Wall must be plastered on the other side 43 db D ntw + Ctr 60 minutes fire resistance (dependent on base wall performance) This system is more suited to reducing mid-frequency sounds, such as speech. Masonry wall with GypLyner UNIVERSAL Wall construction: Cavity: Additional info: Masonry wall (such as brickwork) Minimum 35mm cavity (created by GypLyner UNIVERSAL system) with 25mm Isover APR 1200 insulation 2 x 12.5mm Gyproc SoundBloc Wall must be plastered on the other side 43 db D ntw + Ctr 60 minutes fire resistance (dependent on base wall performance) This system will provide better acoustic insulation against hard to tackle low-frequency sounds, such as home cinema systems. For separating wall and floor constructions to be fully effective, care must be taken 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, etc. The fire resistance and sound insulation performances are for imperforate (e.g. sealed and airtight) partitions, walls and ceilings incorporating boards with all joints taped and filled, or skimmed according to British Gypsum s recommendations. The quoted performances are achieved only if British Gypsum components are used throughout, and the Company s fixing recommendations are strictly observed. Any variation in the specifications should be checked with British Gypsum. 6 Stockist-03-02

7 Separating floors New-build When building new separating floors between dwellings Building Regulations Approved Document E state they are required to meet the 45 db D ntw + Ctr requirement. Example systems Solid timber joist with timber battens Flooring: Under flooring layer: Battens: 18mm tongue and groove chipboard flooring 19mm Gyproc Plank Resilient composite timber battens at 400mm centres Floor insulation: 65mm Isover APR 1200 Sub-deck: Joists: Ceiling fixing: 15mm OSB Minimum 220mm solid timber joists at 400mm centres Gypframe RB1 Resilient Bar at 400mm centres Joist cavity fill: 100mm Isover APR mm Gyproc Plank and 12.5mm Gyproc WallBoard Robust Detail E-FT-2 meets the 45 db D ntw + Ctr requirement 60 minutes fire resistance For separating wall and floor constructions to be fully effective, care must be taken 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, etc. The fire resistance and sound insulation performances are for imperforate (e.g. sealed and airtight) partitions, walls and ceilings incorporating boards with all joints taped and filled, or skimmed according to British Gypsum s recommendations. The quoted performances are achieved only if British Gypsum components are used throughout, and the Company s fixing recommendations are strictly observed. Any variation in the specifications should be checked with British Gypsum. Stockist

8 Flooring: Under flooring layer: Battens: 22mm tongue and groove chipboard flooring 19mm Gyproc Plank 70mm Gypframe 70 SB 65 Steel Battens at 400mm centres Floor insulation: 50mm Isover APR 1200 Sub-deck: Joists: Ceiling fixing: 15mm OSB Minimum 240mm solid timber joists at 400mm centres Gypframe RB1 Resilient Bar at 450mm centres Joist cavity fill: 100mm Isover APR 1200 Additional info: 2 x 15mm Gyproc SoundBloc Where a cavity is required between the ceiling and the joists, Gypframe Resilient Bars can be replaced with the CasoLine MF ceiling, to give a 287mm cavity 45 db D ntw + Ctr Solid timber joist with Gypframe Steel Battens 60 minutes fire resistance Flooring: Under flooring layer: Battens: 22mm tongue and groove chipboard flooring 19mm Gyproc Plank Resilient composite timber battens at 400mm centres Floor insulation: 50mm Isover APR 1200 Sub-deck: Joists: Ceiling fixing: 15mm OSB Minimum 240mm engineered timber I joists at 400mm centres Gypframe RB1 Resilient Bar at 400mm centres Joist cavity fill: 100mm Isover APR 1200 Engineered timber I joist with timber battens 19mm Gyproc Plank and 12.5mm Gyproc SoundBloc Robust Detail E-FT-1 meets the 45 db D ntw + Ctr requirement 60 minutes fire resistance For separating wall and floor constructions to be fully effective, care must be taken 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, etc. The fire resistance and sound insulation performances are for imperforate (e.g. sealed and airtight) partitions, walls and ceilings incorporating boards with all joints taped and filled, or skimmed according to British Gypsum s recommendations. The quoted performances are achieved only if British Gypsum components are used throughout, and the Company s fixing recommendations are strictly observed. Any variation in the specifications should be checked with British Gypsum. 8 Stockist-03-02

9 Conversion For material change of use / conversion of separating walls, Building Regulations Approved Document E state they are required to meet the 43 db D ntw + Ctr requirement. Example systems Solid timber joist with GypFloor SILENT and CasoLine MF ceiling Flooring: Under flooring layer: Joist channels: Joists: 21mm tongue and groove chipboard flooring 19mm Gyproc Plank Gypframe SIF Floor Channels Solid timber joists Cavity fill: 100mm Isover APR 1200 Ceiling system: Floor depth: Overall floor / ceiling depth: CasoLine MF suspended ceiling to give a 277mm cavity 2 x 15mm Gyproc SoundBloc From top of joist approximately 30mm Approximately 340mm 43 db D ntw + Ctr 60 minutes fire resistance For separating wall and floor constructions to be fully effective, care must be taken 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, etc. The fire resistance and sound insulation performances are for imperforate (e.g. sealed and airtight) partitions, walls and ceilings incorporating boards with all joints taped and filled, or skimmed according to British Gypsum s recommendations. The quoted performances are achieved only if British Gypsum components are used throughout, and the Company s fixing recommendations are strictly observed. Any variation in the specifications should be checked with British Gypsum. Stockist

10 Flooring: Joist channels: Joists: 21mm tongue and groove chipboard flooring Gypframe SIF Floor Channels Solid timber joists at 450mm or 600mm centres Cavity fill: 100mm Isover APR 1200 Ceiling system: Floor depth: Ceiling depth: Additional info: Gypframe RB1 Resilient Bar at 450mm centres Inner layer 19mm Gyproc Plank Outer layer 12.5mm Gyproc SoundBloc Approximately 30mm Approximately 50mm Where a cavity is required between the ceiling and the joists, Gypframe Resilient Bars can be replaced with the CasoLine MF ceiling, to give a 287mm cavity 43 db D ntw + Ctr Solid timber joist with GypFloor SILENT 60 minutes fire resistance Flooring: Under flooring layer: Joist channels: Joists: Fire protection: 21mm tongue and groove chipboard flooring 19mm Gyproc Plank Gypframe SIF Floor Channels Solid timber joists (minimum 50mm width) Cavity bridged between joists by 12.5mm Glasroc F MULTIBOARD, resting on 12.5mm Glasroc F MULTIBOARD strips, screw fixed to each joist (fixed flush) Cavity fill: 100mm Isover APR 1200 Floor depth: Ceiling depth: Solid timber joist with GypFloor SILENT and retained ceiling Original lath and plaster ceiling Approximately 30mm None Test and declare 1 60 minutes fire resistance 1 Where the original ceiling needs to be retained, for example an ornate lath and plaster ceiling in an historic building, it may not be possible to achieve the regulatory standards. It may therefore be permitted to test on site and declare the performance achieved subject to Building Control acceptance. For separating wall and floor constructions to be fully effective, care must be taken 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, etc. The fire resistance and sound insulation performances are for imperforate (e.g. sealed and airtight) partitions, walls and ceilings incorporating boards with all joints taped and filled, or skimmed according to British Gypsum s recommendations. The quoted performances are achieved only if British Gypsum components are used throughout, and the Company s fixing recommendations are strictly observed. Any variation in the specifications should be checked with British Gypsum. 10 Stockist-03-02

11 External walls New-build Building Regulations Approved Document L1A stipulates that compliance is based on the carbon performance of the whole dwelling and a whole building measure is given through the use of a SAP calculation. There are many factors that influence the SAP calculation and the U-value of the external envelope (external walls) is only one part of this. Therefore the following example systems detail different U-values that can be achieved by using alternate Gyproc ThermaLine laminates; this should help give the flexibility required when designing a new property. In Scotland, Building Regulations Section 6 stipulates minimum performances and these can vary depending on the type of heating system. Example systems Full-fill cavity wall with medium density blocks External leaf: Cavity: 103mm brick skin 75mm cavity full-filled with Isover Hi-Cav Internal leaf: 100mm medium dense block (0.61 W/m 2 K) DriLyner BASIC with Gyproc Dri-Wall Adhesive or DriLyner TL using Gyproc Dri-Wall Adhesive and Gyproc Nailable Plugs Gyproc WallBoard or Gyproc ThermaLine laminate (see below) U-value Gyproc ThermaLine laminate Wall thickness (mm) mm Gyproc ThermaLine SUPER mm Gyproc ThermaLine SUPER mm Gyproc ThermaLine SUPER mm Gyproc ThermaLine PLUS mm Gyproc ThermaLine PLUS mm Gyproc WallBoard 301 The fire resistance and sound insulation performances are for imperforate (e.g. sealed and airtight) partitions, walls and ceilings incorporating boards with all joints taped and filled, or skimmed according to British Gypsum s recommendations. The quoted performances are achieved only if British Gypsum components are used throughout, and the Company s fixing recommendations are strictly observed. Any variation in the specifications should be checked with British Gypsum. Stockist

12 Full-fill cavity wall with aircrete blocks External leaf: Cavity: 103mm brick skin 75mm cavity full-filled with Isover Hi-Cav insulation Internal leaf: 100mm aircrete block (0.11 W/m 2 K) DriLyner BASIC with Gyproc Dri-Wall Adhesive or DriLyner TL using Gyproc Dri-Wall Adhesive and Gyproc Nailable Plugs Gyproc WallBoard or Gyproc ThermaLine laminate (see below) U-value Gyproc ThermaLine laminate Wall thickness (mm) mm Gyproc ThermaLine SUPER mm Gyproc ThermaLine SUPER mm Gyproc ThermaLine PLUS mm Gyproc ThermaLine PLUS mm Gyproc ThermaLine BASIC mm Gyproc WallBoard Two coats of Gyproc Drywall Sealer are required to provide a vapour control layer. Conversion Building Regulations Approved Document L1B includes extensions, creating new dwellings through a change of use, or alterations to existing dwellings. The thermal element, i.e. the wall, roof or floor that separates a heated space from an unheated space, must achieve set U-values and these vary depending on whether the thermal element is in an extension or renovation of an existing element. The following table highlights the U-value required, and these values can then be selected from the following example systems. L1B New element Renovations (e.g. extensions) Wall (0.70) 1 Cavity wall (0.70) 1 1 If the current element is worse than the U-value quoted in brackets, then they should be upgraded to the adjacent U-value. In Scotland, Building Regulations Section 6 stipulates minimum performances. For walls, typically 0.27 W/m 2 K is required. The fire resistance and sound insulation performances are for imperforate (e.g. sealed and airtight) partitions, walls and ceilings incorporating boards with all joints taped and filled, or skimmed according to British Gypsum s recommendations. The quoted performances are achieved only if British Gypsum components are used throughout, and the Company s fixing recommendations are strictly observed. Any variation in the specifications should be checked with British Gypsum. 12 Stockist-03-02

13 Example systems Clear cavity wall with medium density blocks External leaf: Cavity: 103mm brick skin Minimum 50mm clear cavity Internal leaf: 100mm medium dense block (0.61 W/m 2 K) DriLyner TL using Gyproc Dri-Wall Adhesive and Gyproc Nailable Plugs Gyproc ThermaLine laminate (see below) U-value Gyproc ThermaLine laminate Wall thickness (mm) mm Gyproc ThermaLine SUPER mm Gyproc ThermaLine SUPER mm Gyproc ThermaLine SUPER 323 Clear cavity wall with aircrete blocks External leaf: Cavity: 103mm brick skin Minimum 50mm clear cavity Internal leaf: 100mm aircrete block (0.11 W/m 2 K) DriLyner TL using Gyproc Dri-Wall Adhesive and Gyproc Nailable Plugs Gyproc ThermaLine laminate (see below) U-value Gyproc ThermaLine laminate Wall thickness (mm) mm Gyproc ThermaLine SUPER mm Gyproc ThermaLine SUPER mm Gyproc ThermaLine SUPER mm Gyproc ThermaLine SUPER mm Gyproc ThermaLine SUPER mm Gyproc ThermaLine BASIC Two coats of Gyproc Drywall Sealer are required to provide a vapour control layer. The fire resistance and sound insulation performances are for imperforate (e.g. sealed and airtight) partitions, walls and ceilings incorporating boards with all joints taped and filled, or skimmed according to British Gypsum s recommendations. The quoted performances are achieved only if British Gypsum components are used throughout, and the Company s fixing recommendations are strictly observed. Any variation in the specifications should be checked with British Gypsum. Stockist

14 Brick and brick clear cavity wall External leaf: Cavity: Internal leaf: 103mm brick skin Minimum 50mm clear cavity 103mm brick DriLyner TL using Gyproc Dri-Wall Adhesive and Gyproc Nailable Plugs Gyproc ThermaLine laminate (see below) U-value Gyproc ThermaLine laminate Wall thickness (mm) mm Gyproc ThermaLine SUPER mm Gyproc ThermaLine SUPER mm Gyproc ThermaLine SUPER mm Gyproc ThermaLine SUPER mm Gyproc ThermaLine SUPER mm Gyproc ThermaLine PLUS 306 Solid brick wall Wall construction: 215mm solid brick wall GypLyner UNIVERSAL (or DriLyner RF using Gyproc Sealant, where stated) Gyproc ThermaLine laminate (see below) U-value Gyproc ThermaLine laminate Wall thickness (mm) mm Gyproc ThermaLine SUPER and 50mm Isover APR mm Gyproc ThermaLine SUPER (no insulation and 25mm cavity) mm Gyproc ThermaLine SUPER and 25mm Isover APR mm Gyproc ThermaLine SUPER using DriLyner RF (brickwork 291 (minimum) plastered internally) The fire resistance and sound insulation performances are for imperforate (e.g. sealed and airtight) partitions, walls and ceilings incorporating boards with all joints taped and filled, or skimmed according to British Gypsum s recommendations. The quoted performances are achieved only if British Gypsum components are used throughout, and the Company s fixing recommendations are strictly observed. Any variation in the specifications should be checked with British Gypsum. 14 Stockist-03-02

15 Solid stone wall External leaf: 300mm solid stone wall GypLyner UNIVERSAL Gyproc ThermaLine laminate (see below) U-value Gyproc ThermaLine laminate Wall thickness (mm) mm Gyproc ThermaLine SUPER mm Gyproc ThermaLine SUPER and 50mm Isover APR mm Gyproc ThermaLine SUPER mm Gyproc ThermaLine SUPER and 50mm Isover APR mm Gyproc ThermaLine SUPER and 25mm Isover APR mm Gyproc ThermaLine SUPER and 25mm Isover APR Render and block wall Wall construction: 16mm external render, 190mm medium density block (0.61 W/m 2 K) GypLyner UNIVERSAL (or DriLyner RF using Gyproc Sealant, where stated) Gyproc ThermaLine laminate (see below) U-value Gyproc ThermaLine laminate Wall thickness (mm) mm Gyproc ThermaLine SUPER using DriLyner RF (blockwork 302 plastered internally) mm Gyproc ThermaLine SUPER and 50mm Isover APR mm Gyproc ThermaLine SUPER and 25mm Isover APR mm Gyproc ThermaLine SUPER using DriLyner RF (blockwork 282 plastered internally) Window reveals Window reveals can often be a weak point in the thermal insulation as space is restricted for fitting Gyproc ThermaLine laminates. 27mm Gyproc ThermaLine PLUS is a thin laminate that can be used around window reveals and where space is tight. Ensuring all surfaces of external walls are covered with some insulation will improve the overall insulation of the space. The fire resistance and sound insulation performances are for imperforate (e.g. sealed and airtight) partitions, walls and ceilings incorporating boards with all joints taped and filled, or skimmed according to British Gypsum s recommendations. The quoted performances are achieved only if British Gypsum components are used throughout, and the Company s fixing recommendations are strictly observed. Any variation in the specifications should be checked with British Gypsum. Stockist

16 Basements and cellars Rooms beneath the ground can be difficult to treat as moisture can travel through the ground. Basements and cellars can have a tanking treatment to reduce this occurrence, however this can cause condensation to form on the inside of the room. The GypLyner IWL (Independent Wall Lining) system builds away from existing walls, fixing to floors, ceilings and adjacent walls to support the framework to reduce the contact with any tanking. Gyproc ThermaLine PLUS has a high level of thermal insulation as well as a vapour control barrier to reduce condensation forming behind the lining. Seek advice Some tanking methods will be downgraded if there is any penetration in the tanking seal. BS5250:2002 contains some limited guidance. However, we would advise you to seek the guidance of a specialist in the field of Hygrothermal performance and properties for structures below ground to determine whether there is any risk of interstitial condensation within the construction. The fire resistance and sound insulation performances are for imperforate (e.g. sealed and airtight) partitions, walls and ceilings incorporating boards with all joints taped and filled, or skimmed according to British Gypsum s recommendations. The quoted performances are achieved only if British Gypsum components are used throughout, and the Company s fixing recommendations are strictly observed. Any variation in the specifications should be checked with British Gypsum. 16 Stockist-03-02

17 Room-in-the-roof and loft spaces New-build Building Regulations Approved Document L stipulates that the external fabric (e.g. gable walls) meet minimum requirements to comply with thermal performances. Example constructions for wall and roof linings are shown below. In Scotland, Building Regulations Section 6 stipulates minimum performances which can vary depending on the type of heating system, typically 0.27 W/m 2 K for walls, 0.20 W/m 2 K for pitched roofs with insulation between the rafters (room-in-the-roof) and 0.16 W/m 2 K for pitched roofs with insulation between ceiling joists (loft spaces). Example systems Wall linings Studs: Timber studs at 600mm centres Insulation: Installed between the studs (see below) Timber fraction: 15% Gyproc ThermaLine laminate or plasterboard (see below) U-value Insulation Gyproc ThermaLine laminate / plasterboard mm Isover Frame Batt 35 40mm Gyproc ThermaLine PLUS mm Isover Frame Batt 34 40mm Gyproc ThermaLine BASIC mm Isover Frame Batt 35 35mm Gyproc ThermaLine PLUS mm Isover Frame Batt mm Gyproc WallBoard DUPLEX 1 Two coats of Gyproc Drywall Sealer are required to provide a vapour control layer. Roof lining Roof construction: Tiled or slated roof on tiling battens on breather membrane. Softwood rafters at 600mm centres Insulation: Installed between the rafters (see below) Timber fraction: 8.3% Roof lining: Gyproc ThermaLine laminate (see below) U-value Insulation Gyproc ThermaLine laminate mm (4 x) 50mm Isover Frame Batt 32 70mm Gyproc ThermaLine SUPER mm (2 x) 100mm Isover Frame Batt 35 70mm Gyproc ThermaLine SUPER mm Isover Frame Batt 34 70mm Gyproc ThermaLine SUPER mm Isover Frame Batt 35 70mm Gyproc ThermaLine SUPER The fire resistance and sound insulation performances are for imperforate (e.g. sealed and airtight) partitions, walls and ceilings incorporating boards with all joints taped and filled, or skimmed according to British Gypsum s recommendations. The quoted performances are achieved only if British Gypsum components are used throughout, and the Company s fixing recommendations are strictly observed. Any variation in the specifications should be checked with British Gypsum. Stockist

18 Conversion Whether insulating a loft space to meet Building Regulations Approved Document L or transforming it to a liveable room-in-the-roof, the following U-value requirements should be met. L1B Extensions Renovations Wall (0.70) 1 Pitched roof with insulation between the rafters (room-in-the-roof) (0.35) 1 Pitched roof with insulation between ceiling joists (loft space) (0.35) 1 1 If the current element is worse than the U-value quoted in brackets, then they should be upgraded to the adjacent U-value. Cavity walls can be upgraded to just In Scotland, Building Regulations Section 6 stipulates minimum performances typically 0.27 W/m 2 K for walls, 0.20 W/m 2 K for pitched roofs with insulation between the rafters (room-in-the-roof) and 0.16 W/m 2 K for pitched roofs with insulation between ceiling joists (loft spaces). Details on suitable external wall linings can be found earlier in this guide. Care should be taken to ensure any work is carried out in accordance with local planning rules, specifically where there are changes to the ridge or shape of the roof and the type of area the dwelling is located. Example systems Insulation at the ceiling (loft space) Insulation between rafters: 170mm Isover Space Saver Roll Timber fraction: 6.3% Gyproc ThermaLine laminate (see below) U-value Gyproc ThermaLine laminate mm Gyproc ThermaLine SUPER The fire resistance and sound insulation performances are for imperforate (e.g. sealed and airtight) partitions, walls and ceilings incorporating boards with all joints taped and filled, or skimmed according to British Gypsum s recommendations. The quoted performances are achieved only if British Gypsum components are used throughout, and the Company s fixing recommendations are strictly observed. Any variation in the specifications should be checked with British Gypsum. 18 Stockist-03-02

19 Wall linings Studs: Insulation: Timber studs at 600mm centres Installed between the studs (see below) Timber fraction: 15% Gyproc ThermaLine laminate or plasterboard (see below) U-value Insulation Gyproc ThermaLine laminate / plasterboard 0.24 No insulation 90mm Gyproc ThermaLine SUPER mm Isover Frame Batt 35 40mm Gyproc ThermaLine PLUS 0.27 No insulation 80mm Gyproc ThermaLine SUPER mm Isover Frame Batt 35 27mm Gyproc ThermaLine PLUS mm Isover Frame Batt 35 35mm Gyproc ThermaLine PLUS mm Isover Frame Batt mm Gyproc WallBoard DUPLEX Roof lining Roof construction: Insulation: Tiled or slated roof on tiling battens on sarking felt with a 50mm ventilated cavity. Softwood rafters at 600mm centres (see below) Installed between the rafters (see below) Timber fraction: 8.3% Roof lining: Gyproc ThermaLine laminate or plasterboard (see below) U-value Insulation Gyproc ThermaLine laminate mm rafters with 100mm Isover Frame Batt 35 70mm Gyproc ThermaLine SUPER mm rafters with 75mm phenolic foam 60mm Gyproc ThermaLine SUPER mm rafters with 100mm phenolic foam 50mm Gyproc ThermaLine SUPER The fire resistance and sound insulation performances are for imperforate (e.g. sealed and airtight) partitions, walls and ceilings incorporating boards with all joints taped and filled, or skimmed according to British Gypsum s recommendations. The quoted performances are achieved only if British Gypsum components are used throughout, and the Company s fixing recommendations are strictly observed. Any variation in the specifications should be checked with British Gypsum. Stockist

20 20 Stockist-03-02