Limiting (average) Limiting (individual) Extensions (Wall>0.70, Roof>0.25) Extensions (Wall<0.70, Roof<0.25)

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1 BUILDING REGULATIONS England New Build Existing Wales New Build Existing Scotland New Build Existing Schemes Legislation Act Wall W/m 2 K Roof External Cavity Party Ceiling Pitched Flat Notional 2010 BRegs Part L1A Limiting New & replaced 2010 BRegs Part L1B Retained Retained treshold Notional 2014 BRegs Part L1A Limiting New & replaced 2014 BRegs Part L1B Conversion&Renovation Retained treshold Notional Technical Hardbook Section Limiting (average) Limiting (individual) Extensions (Wall>0.70, Roof>0.25) Extensions (Wall<0.70, Roof<0.25) Technical Hardbook Section Conversions (average) Individual elements Building Regulations Building Regulations require thermal element within a building envelope to meet certain U-values. The target U-value depends on type of element, use of building and whether it is a new or an existing construction. England, Wales ans Scotland are now each responsible for their own Building Regulations and target U-values can therefore differ throughout the UK. The above table gives a summary of requirements for domestic buildings at time of printing (October 2014). If required this information can be confirmed with your local Building Control. Good pratice guidance The solutions provided may require an independent vapour control layer or breather membrane product to reduce the risk of interstitial condensation. Where a vapour control layer is required, a product with a vapour resistance Z>1100MNs/g should be used. Both vapour control layer and breather membrane need to be continuous and all joints sealed with adequate tape, to avoid air infiltration. To allow moist air to disperse into the atmosphere, the void between breather membrane and outer covering needs adequate ventilation. Please also refer to the installation guidelines. FOR FURTHER ADVICE FROM ACTIS PLEASE CALL THE TECHNICAL DEPARTMENT ON

2 TIMBER FRAME WALLS as standalone A 14 deep timber frame stud wall is filled with 12. This solution achieves the of 0.27W/m 2.K with a single insulation product. PF19: Between 14 studs: 12 full fill 0.27W/m²K 12

3 TIMBER FRAME WALLS Combination of HYBRID products A 9 deep timber frame stud wall is filled with, faced internally with HCONTROL- HYBRID, the vapour control layer, and externally with plywood sheathing and BOOST R HYBRID, the vapour permeable membrane. A 5 cavity separates the timber frame from the outer leaf, typically of brick. This solution achieves the required of 0.17W/m 2.K using 9 studs. PF22: Between 9 studs: + 45mm + BOOST R HYBRID 45mm 0.17W/m²K PF23: Between 14 studs: BOOST R HYBRID W/m²K

4 TIMBER FRAME WALLS PF24: Between 14 studs: + 105mm 105mm PF39: Between 72mm studs: 0.30W/m²K PF25: Between 72mm studs: + BOOST R HYBRID 0.21W/m²K

5 TIMBER FRAME WALLS PF26: Between 15 studs: 12 + BOOST R HYBRID 12 PF45: Between 9 studs: 45mm + 45mm 0.23W/m²K Combination of hybrid products with other materials PF46: Between 72mm studs: BOOST R HYBRID + 50 foam board 0.23W/m²K

6 SOLID WALLS as standalone insulation is installed on the internal side of a solid wall. PF40: 2 x 38 x 38 battens 0.30W/m²K

7 PITCHED ROOFS Combination of hybrid products BOOST R HYBRID is used as breather membrane, is filled between the rafters, HCONTROL- HYBRID is laid as vapour control layer. Internal finish is a standard plasterboard. This solution achieves the required of 0,18W/m 2.K without losing space. PF30: 60 timber centers: + 45mm + BOOST R HYBRID 45mm PF43: : 60 timber centers: BOOST R HYBRID W/m²K

8 PITCHED ROOFS PF31: 60 timber centers: PF33: 60 timber centers : 12 + BOOST R HYBRID 12 PF34: 60 timber centers: + 6 foam board

9 PITCHED ROOFS PF35 : 40 timber centers: + 7 foam board PF42: 60 timber centers: BOOST R HYBRID + 85mm foam board

10 LOFT INSULATION Between and over joists is installed between and over ceiling joists or on continuous solid floors. This solution achieves the required of 0.16W/m 2.K with a single product in 2 layers. PF37: 60 timber centers mm 0.16W/m²K 195mm PF44: 60 timber centers W/m²K 24