The details in appendix 7 1 a are intended to be a guide and may vary depending on the individual manufacturer s system.
Nhbc standards chapter 7 1 flat roofs and balconies.
The upper trafficked surface of the balcony.
Durability and fixing of balustrading and guard rails.
Chapter 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.
Nhbc standards chapter 7 1 flat roofs and balconies.
Flat roofs and balconies 7 1 7 1 11 accessible thresholds accessible thresholds shall be protected by adequate weatherproofing and drainage.
7 1 3 flat roof and balcony design flat roofs and balconies shall support and transmit loads safely to the structure.
Where run off may cause damage or staining to a façade or damage to landscaping then rainwater gutters and downpipes should be provided.
Rainwater disposal from roofs and balconies 6m2 or less in area should be considered.
The structural substrate of the flat roof.
A flat roof should be regarded as having a maximum slope of 10 from the horizontal decking or deck is the substrate of a flat roof or the upper surface of a balcony.
Intensive and extensive green roofs are shown in appendix 7 1 a.
Open slatted balcony decking should drain away from the home.
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.
Design that follows the guidance below will be acceptable for both flat roofs and balconies.
Updated chapter 6 6 staircases this chapter has been fully updated to make it clearer and align with industry guidance revised chapter 9 1 a consistent approach to finishes includes new guidance as well as a review of the existing tolerances to ensure they are appropriate and meet the reasonable expectations of homeowners.
Appendix 7 1 c includes typical details for flat roofs and balconies.
Balcony drainage timber balconies and terraces revised october 2018 nhbc standards chapter 7 2 pitched roofs.
Issues to be taken into account include.
Strength and movement of masonry balcony walls.
Balconies and flat roofs to which persons have regular access other than for maintenance shall be adequately guarded to minimise the risk of falling.
For the purposes of this chapter.
Falls flat roofs and balconies should.
The cumulative effect of water discharging from multiple balconies in vertical alignment should be taken into account.
The structural design of flat roofs and balconies should.
Systems may be used at a greater pitch where they meet the requirements of this chapter and materials are adequately held in place.
