BS 6229: 2025 Update – Key Points for Members

The revised standard clearly identifies its intended users, including architects, surveyors, roof designers and contractors, and improves terminology. Design requirements are strengthened, with a minimum 1:80 finished fall for general roof areas and internal gutters, and a new requirement for a level survey and documented handover for decks or slabs. Thermal performance requirements include a 2.5% insulation increase for inverted warm roofs (where certified), and condensation control aligns with BS 5250. Fire safety is reinforced in line with building regulations, including assessment of combustibility throughout construction. Use of CLT decks should be avoided where possible, with stricter controls where used. The update also strengthens requirements for information exchange, workmanship, maintenance and change of use.

NFRC has produced a new Guide to reflect the standard and give an overview. The revised standard will shortly be available in the Members area of the website in the BSI publications library.