The British Standard BS 6229 has long been the go-to guidance for designing and maintaining flat roofs with continuously supported flexible waterproof coverings. But the industry is evolving - and so is the standard.
Following a public consultation earlier this year, the revised BS 6229 is expected to be published late 2025 or early 2026. Here’s what you need to know about the key changes likely to shape flat roof design for the next decade.
Why the Update?
The last revision was in 2018. Since then, roofing technology and sustainability requirements have advanced significantly. We are expecting the new standard to make inclusions on:
- Clarification on deck levels and drainage
- Enhance thermal and fire performance
- Support integrated solutions like green roofs, blue roofs, and solar PV
Expected Key Changes
- Roof Falls & Drainage
- Definitions and clarification on Zero Falls and Absolute Zero Falls
- Clarification and eliminating back-falls and standing water
- Mandatory level surveys before deck handovers
- Cold Roofs and SIP Panel Roof Insulation
- When they should be used and the conditions
- Terminology Updates
- Fire Safety Considerations and reference to NFRC Safe 2 Torch compliance.
What This May Mean for Building Managers
- Compliance will be evidence-based: Expect documented drainage calculations, insulation performance checks, and fire safety verification
- Early planning saves money: Designing to the new standard now avoids costly redesigns later
- Future-proof your assets: The update reflects sustainability and resilience - critical for long-term building performance
How RAM Can Help
At RAM Building Consultancy, we help clients stay ahead of regulatory changes:
- Design reviews aligned with the upcoming BS 6229 requirements
- Compliance audits for drainage, insulation, and detailing
- Training sessions for your team on the new standard
Act Now
The revised BS 6229 will shape flat roof design for years to come. Don’t wait for the official release - start planning today.
Contact RAM Building Consultancy for a consultation and ensure your projects are future-ready.
