What Is the Fire Rating of a Polycarbonate Roof?

If you’re installing or upgrading a polycarbonate roof, one of the most common questions is:

“What is the fire rating of polycarbonate roofing?”

At Omegabuild, we supply Marlon polycarbonate sheets, manufactured in the UK by Brett Martin. These products are rigorously tested and certified to meet European fire performance standards—giving you confidence in both safety and compliance.

Fire Rating Explained

Most Marlon polycarbonate roofing sheets achieve a fire classification of:

👉 B-s1, d0 (EN 13501-1)

This means:

B – Very limited contribution to fire
s1 – Little or no smoke production
d0 – No flaming droplets

For thicker multiwall sheets (e.g. 25mm), the rating may be:

👉 B-s2, d0
(Slightly higher smoke production but still strong fire performance)

These classifications are independently tested and verified under European standards.

Verified Test Results

The fire ratings above are not estimates—they are based on official laboratory testing:

10mm twinwall: B-s1, d0
16mm triplewall: B-s1, d0
25mm 7-wall: B-s2, d0

All testing is carried out in accordance with EN 13501-1, the European standard for reaction to fire in construction products.

👉 You can view the full certification reports here:

Frequently Asked Questions

Find quick answers to the most common questions about the fire rating of polycarbonate roofing.

What is the fire rating of polycarbonate roofing?

Many Marlon polycarbonate roofing sheets supplied by Omegabuild are classified as
B-s1,d0 under EN 13501-1, meaning they have a very limited contribution to fire,
low smoke production, and no flaming droplets. Some thicker variants are classified as
B-s2,d0.

Is polycarbonate roofing fire resistant?

Yes. Polycarbonate roofing is designed and tested to perform well in fire classification tests.
It does not easily ignite and is assessed for flame spread, smoke production, and flaming droplets.

What does B-s1,d0 mean?

B means limited contribution to fire, s1 means very low smoke production,
and d0 means no flaming droplets are produced.

Do all polycarbonate sheets have the same fire rating?

No. Fire rating can vary depending on the thickness and construction of the sheet.
In the Marlon range, 10mm twinwall and 16mm triplewall are rated B-s1,d0,
while 25mm 7X-wall is rated B-s2,d0.

Does Omegabuild polycarbonate come with certification?

Yes. The Marlon sheets supplied by Omegabuild are backed by independent fire classification reports
and come with a 10-year warranty.
You can link to the relevant product reports from this section for full details.

Can I use polycarbonate roofing on my project?

Polycarbonate roofing is suitable for many domestic and commercial roofing applications,
but final compliance depends on the full roof build-up, fixings, and substrate. Always check
the specific project requirements before installation.