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Flame-Resistant Heights: Navigating Fire Testing Compliance in Flat Roofing

By Holrow Limited in Industry News

At Holrow, we recognise the increasing concerns regarding fire safety standards in the flat roofing sector, especially in light of the tragic Grenfell Tower fire. This event has heightened awareness of the need for rigorous testing and compliance within the industry, as highlighted in a recent article by The Guardian, which highlighted the need for a cultural shift towards prioritising safety over cost (Kollewe, 2024).

To ensure safety and compliance, it is vital for all stakeholders to use roofing systems that have been properly tested to meet UK fire performance standards. Therefore, we aim to clarify the essential fire safety standards applicable to flat roofs in the UK.

Key Fire Testing Standards


  1. Accepted Test Method: In the UK, the only fire test standard for flat roofs is BROOF(t4). This classification signifies compliance with local regulations.
  2. Non-Accepted Standards: Other classifications, such as BROOF(t1), BROOF(t2), and BROOF(t3), are not recognised in the UK. This makes them unsuitable for use in building projects.

Importance of Compliance

The Building Regulations 2010, revised in 2019, emphasise that roofing systems must effectively resist fire spread and that all roofing materials must undergo testing in line with BS EN 13501-5 and DD CEN/TS 1187:2012, particularly the T4 test. Adhering to these standards is crucial not only for safety but also for legal compliance, particularly in light of the Building Safety Act established after Grenfell.

The T4 Testing Process

The T4 test evaluates a roof's performance under a rigorous two-stage process, including exposure to burning brands, wind, and radiant heat. This is the only test that meets UK standards. The results are categorised as follows:


  • BROOF(t4): Indicates no fire penetration for up to 60 minutes.
  • FROOF(t4): Indicates insufficient data to determine fire resistance.

Opting for a BROOF(t4) rated roofing system ensures enhanced fire safety, especially when considering the building's distance from property boundaries.

Encouraging Industry Collaboration

As demand for building materials grows, it’s crucial for all of us in the industry to ensure that we source roofing products that meet UK standards. This commitment not only protects lives but also helps maintain the integrity of our industry. Non-compliance can lead to serious repercussions, including legal consequences, reputational damage, and financial implications.

Key Takeaways

To mitigate risks and enhance safety, we encourage specifiers, contractors, and suppliers to prioritise BROOF(t4) rated systems for all flat roofing projects. A clear understanding of roles and responsibilities among stakeholders is essential to prevent future tragedies (Kollewe, 2024). By fostering accountability and a culture of safety within the industry, we can work together to improve practices and protect the well-being of all involved.

Let’s strive for a safer future in construction by prioritising compliance and quality together.