R'BULL Pro stands up to the flame

Not spreading flame is not the same as not burning

The question comes up on almost every job, and it is a fair one: insulation fitted under a roof or on a ceiling sits directly in the path of a fire. What is asked of it is not to be non-combustible, very few building materials are, but not to carry the fire from one part of the building to another.

What the sequence shows in a few seconds

The flame is applied directly to the complex, with no screen and no treatment added for the demonstration. The moment that counts is when it is taken away: nothing goes on burning by itself, and nothing falls as flaming droplets that would start a second fire on the floor below.

What the classification says

R'BULL Pro 13 is classified B-s1,d0 under EN 13501-1. The B stands for a limited contribution to fire, the s1 for very low smoke emission, the d0 for the absence of flaming droplets. In a house fire it is the smoke that stops people getting out, well before the flames arrive, so the s1 index is not a detail buried in a data sheet.

The classification also decides where the product may be installed, particularly in buildings open to the public. The case by case detail is set out on our page about fire regulations. The full product sheet is on the R'BULL Pro 13 page.

The question nobody asks at the right moment

How insulation behaves in a fire is checked before ordering, never after fitting. Once the ceiling is closed, nothing is reachable again without opening the whole thing. It is the one item on a job where saving a few cents per square metre can cost an entire building.