Nhbc Warm Roof Detail

7 1 appendix 7 1c construction details for flat roofs and balconies.

Nhbc warm roof detail.

Balcony access weatherproofing and drainage. A roof with a maximum slope of 10 from the horizontal. Where holding down straps are necessary they should have a minimum cross section of 30mm x 2 5mm and be fixed at maximum 2m centres. Nhbc house davy avenue knowlhill milton keynes bucks mk5 8fp.

Nhbc is authorised by the prudential regulation authority and regulated by the financial conduct authority and the prudential regulation authority. For technical advice and support call 01908 747384 or visit www nhbc co uk in this issue. Inverted warm roof inverted concrete deck. Appendix 7 1 a shows the three flat roof constructions acceptable to nhbc with variations for timber and concrete structural support.

Raft foundations edge detail. Nhbc standards chapter 4 4 formerly ch 4 5 raft pile pier and beam foundations. Foundation concrete steps in foundations strip and trench fill foundations on level sites. Some roof covering manufacturers provide detailed guidance.

Where the roof pitch is 15 or more ventilation equivalent to a 10mm slot running the full length of the eaves should be provided. Insulated above the deck. The structural substrate of the flat roof. Nhbc standards chapter 4 3 formerly ch 4 4 strip and trench fill foundations.

Introducing revised chapter 7 2 pitched roofs page 1 pitched roofs a high proportion of claims page 1 roof mortar page 2 mechanical fixing of ridge and hip tiles page 3 dentil tiles in ridges and hips page 4 interlocking tiles page 4. Nhbc s registered address is. Steel straps with a galvanized finish are normally acceptable. Where the ceiling follows the slope of a roof regardless of pitch or where a cold roof has a pitch less than 15 ventilation equivalent to a 25mm slot running the full length of the eaves should be provided a nominal clearance of 50mm should be maintained.

Systems may be used at a greater pitch where they meet the requirements of this chapter and materials are adequately held in place. Be produced by an engineer in accordance with technical requirement r5 and be in accordance with bs en 1991 1 1 bs en 1991 1 3 and bs en 1991 1 4. The design should detail how straps are to be fixed and what materials are to be used. Warm roof concrete deck timber deck profiled metal deck.

National house building council is registered in england and wales under company number 320784. Flat roofs and balconies shall support and transmit loads safely to the structure. Warm roof concrete deck warm roof timber deck warm roof profiled metal deck inverted warm roof concrete deck intensive green roof extensive green roof. 7 1 appendix 7 1d.

The upper trafficked surface of the balcony. 7 1 appendix 7 1b surface treatments. Appendix 7 1 c includes typical details for flat roofs and balconies. Where trussed rafters and a cut roof are combined the designer should provide details of the complete roof particular care is needed in such circumstances.