Nhbc Standards Chapter 7 1 Flat Roofs And Balconies

A fall of 1 40 should be used for the design of flat roofs and balconies unless a detailed analysis of the roof is carried out including overall and local deflection to ensure the finished fall is not less than 1 80.

Nhbc standards chapter 7 1 flat roofs and balconies.

Nhbc standards do not cover aspects of health and safety relating to building operations and to the handling and use of certain building materials. Rainwater disposal from roofs and balconies 6m2 or less in area should be considered. Falls to balconies acting as flat roofs and slatted balcony decking should drain way from the dwelling. Diagonal bracing to double hipped roof plasterboard fire resisting ceiling in contact with single leaf masonry use of nail guns for fixing trussed rafter bracing.

7 1 flat roofs and balconies this chapter gives guidance on meeting the technical requirements for flat roofs and balconies. The principles for drainage given in chapter 7 2 pitched roofs are applicable to flat roofs and balconies. 0344 633 1000 fax. Ch a p t e r 7 1 this chapter gives guidance on meeting the technical requirements and recommendations for flat roofs and balconies and pitched roofs with a fully supported continuous weatherproof membrane.

Issues to be taken into account include. Waterproofing using profile sheet is outside the scope of this chapter. Answers diagram 1 timber decking up to 600mm from ground level. Balcony drainage timber balconies and terraces revised october 2018 nhbc standards chapter 7 2 pitched roofs.

Nhbc nhbc house davy avenue knowlhill milton keynes bucks mk5 8fp tel. 01908 747 255 www nhbc co uk. 7 1 3 flat roof and balcony design. Have a 75mm minimum balcony upstand below the underside of the projecting sill measured from the balcony drainage layer.

Balconies clause 7 1 4a flat roof constructions which includes terraces chapter 7 1 flat roofs and balconies. Notes the drainage layer is not necessarily the waterproofing layer i e. The structural design of flat roofs and balconies should. Flat roofs and balconies shall support and transmit loads safely to the structure.

7 1 13 guarding to balconies balconies and flat roofs to which persons have regular access other than for maintenance shall be adequately guarded to minimise the risk of falling. The top of the insulation of an inverted roof should be considered as the drainage layer. 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.