We value your privacy
Cookies are small text files stored on your computer by websites you visit. They help users navigate websites efficiently and enable certain essential functions.
Cookies necessary for the website to function properly can be set without your consent, while all other cookies require your approval before being used in your browser.
Additionally, we use cookies to gather data for personalizing and evaluating the effectiveness of our advertising.
For more information, please refer to the Google Privacy Policy.
You can find the list of all the cookies that we use on our website here.
In the UK roofing industry, fire safety is paramount. One of the most critical certifications for flat and liquid-applied roofing systems is the BRoof(t4) classification under BS EN 13501-5. This standard ensures that roofing systems meet stringent fire performance criteria when exposed to external fire sources. For contractors and end users alike, understanding and choosing BRoof(t4)-certified systems is essential for compliance, safety, and peace of mind.
The BRoof(t4) classification originated from the European fire testing standard BS EN 13501-5, developed to harmonize fire safety regulations across EU member states. Prior to its adoption, the UK relied on the national standard BS 476-3:2004 for assessing the external fire performance of roofing systems. However, following updates to Approved Document B of the UK Building Regulations in 2019 – partly in response to the Grenfell Tower fire and the subsequent Hackitt Review—the UK transitioned to the European classification system. The BRoof(t4) test, derived from CEN/TS 1187 Test 4, was specifically designed to simulate UK fire conditions, including exposure to burning brands, wind, and radiant heat. It is now the primary benchmark for evaluating the fire resistance of roofing systems in the UK and Republic of Ireland.
BRoof(t4) is the highest fire performance classification for roofs exposed to external fire, as defined by BS EN 13501-5:2005. It evaluates a roofing system’s resistance to fire spread when exposed to burning brands, wind, and radiant heat.
Key Testing Criteria:
To achieve BRoof(t4), a roofing system must not permit fire penetration within 60 minutes and must limit flame spread to less than 0.38m.
Testing is typically carried out by accredited bodies such as the British Board of Agrément (BBA). The test simulates real-world fire conditions using:
The system must prevent fire penetration and limit flame spread to pass.
While not legally mandatory for all roofs, BRoof(t4) is often required by insurers, architects, and building control for compliance with Building Regulations Part B.
Yes, through overlay systems using BRoof(t4)-certified liquid membranes, existing roofs can be upgraded without full replacement.
Certification typically remains valid as long as the product formulation and installation method remain unchanged. Regular audits ensure ongoing compliance.
These classifications represent different test methods based on regional standards. BRoof(t4) is the most stringent and widely accepted in the UK.
✔ Check for BBA or equivalent certification
✔ Confirm compliance with BS EN 13501-5
✔ Ensure compatibility with your substrate
✔ Verify installation guidelines and training availability
✔ Look for additional benefits like UV resistance, VOC compliance, and warranty
BRoof(t4) certification is more than a regulatory checkbox—it’s a critical component of modern roofing safety and performance. Whether you’re a contractor looking to ensure compliance or a property owner seeking peace of mind, choosing a BRoof(t4)-certified liquid roofing system is a smart, future-proof investment.
Learn how BRoof(t4) certification ensures fire safety and compliance for liquid roofing systems, benefiting both contractors and end users.
Boost your flat roof’s performance and appearance with the perfect GRP trims. Get expert advice and top product tips in our complete guide.
Roofing resins like Original GRP, HPX, MultiFlex, Polyurethane, and Acrylic offer unique benefits for residential and commercial properties. Learn about the advantages, applications, and features of each resin type to choose the best option for your roofing needs.
Upgrade your roof with quality materials for lasting performance and appeal. Explore the advantages of fibreglass kits. Read the full article now.
