Nhbc Warm Roof Detail

Some roof covering manufacturers provide detailed guidance.

Nhbc warm roof detail.

Flat roofs and balconies shall support and transmit loads safely to the structure. National house building council is registered in england and wales under company number 320784. 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. 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. Inverted warm roof inverted concrete deck. Nhbc standards chapter 4 4 formerly ch 4 5 raft pile pier and beam foundations.

Steel straps with a galvanized finish are normally acceptable. For technical advice and support call 01908 747384 or visit www nhbc co uk in this issue. Insulated above the deck. Foundation concrete steps in foundations strip and trench fill foundations on level sites.

Balcony access weatherproofing and drainage. The design should detail how straps are to be fixed and what materials are to be used. 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. 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.

Raft foundations edge detail. 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. 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. The structural design of flat roofs and balconies should.

The structural substrate of the flat roof. Nhbc standards chapter 4 3 formerly ch 4 4 strip and trench fill foundations. Appendix 7 1 a shows the three flat roof constructions acceptable to nhbc with variations for timber and concrete structural support. Nhbc standards chapter 5 2 suspended ground floors.

Nhbc s registered address is. Nhbc house davy avenue knowlhill milton keynes bucks mk5 8fp. 7 1 appendix 7 1c construction details for flat roofs and balconies. 7 1 appendix 7 1d.

Nhbc is authorised by the prudential regulation authority and regulated by the financial conduct authority and the prudential regulation authority. Systems may be used at a greater pitch where they meet the requirements of this chapter and materials are adequately held in place. A roof with a maximum slope of 10 from the horizontal. Warm roof concrete deck warm roof timber deck warm roof profiled metal deck inverted warm roof concrete deck intensive green roof extensive green roof.