BROOF (t4)
BROOF(t4) refers to the highest fire rating classification for roofs according to the European classification system BS EN 13501-5 since the national classification system BS 476-3:2004 no longer applied after 2019 and the new Approved Regulations Part B. The test indicates that the roof system prevents fire penetration for at least 60 minutes resistance to external fire spread, penetration, and burning droplets and is essential for compliance in UK building regulations, often required for flat roofs, terraces, and high-rise developments.
- No penetration of roof system within 60 minutes
- In preliminary test, after withdrawal of the test flame, specimens burn for less than 5 minutes
- In preliminary test, flame spread less than 0.38 m across region of burning
[edit] Related articles on Designing Buildings
- Blue roof.
- Cold roof.
- Designing out fire risk in roof voids.
- Existing guidance on fire compartmentation in roof voids.
- Flat roof.
- Green roof.
- Metal roofing.
- Pitched roof.
- Shingle roofing.
- Slate roofing.
- Solar panels, pitched roofs and risk of fire spread.
- Tile roofing.
- Thatch roofing.
- Types of roof.
- Warm roof.
Featured articles
Check out some of the best features and news from Designing Buildings as well as key stories from around the web.
Listed structures on the rail network
Heritage interests and operational requirements must be balanced.
Historic England publishes research into embodied carbon when retrofitting traditional buildings.
New Prime Minister delivers on ECA call for cut in electricity costs.
CIOB reacts to the announcement of Andy Burnham as Prime Minister.
Heritage and conservation science workforce survey - Have your say.
England's Suburbs 1820-2020. Book review.
New, more proportionate and targeted approach for higher-risk building assessments.
Government brings British Steel into public ownership.
UKCW Birmingham returns with bold new theme and focus.
New guidance published on competence requirements for self-certification schemes.
Construction Management, 8 July
NEETs crisis drives interest in trades, but apprenticeships barriers remain.
Passive fire protection webinar
MEP services penetration seals.