Polysolar Roof Systems Secure Highest BRoof(t4) Fire Safety Classification
Polysolar is delighted to announce that both its transparent solar PV glass and lightweight flexible solar panels when incorporated into its roof mounting systems have achieved a BRoof(t4) classification. Following stringent independent testing, Polysolar is among some of the first solar companies in the UK to achieve this premium fire rating classification.
This classification represents the highest level of building fire performance for roof coverings under UK and European standards, conforming to BS EN 13501-5 ensuring clients can confidently install Polysolar’s products across a wide range of applications.
What does this mean?
CEN/TS 1187 Test 4 is the most rigorous external fire test for roof systems. It simulates a severe fire scenario achieving no burn penetration for an hour, and no continued flame burn <5mins or spread <0.38m. Achieving BRoof(t4) demonstrates that the roof system resists fire spread, prevents fire penetration and does not produce burning droplets.
Polysolar’s solar PV glass was tested as part of a complete roof canopy build-up, incorporating a glulam spruce timber structure, our aluminium ladder framing system and our PS-CT solar glass.
Polysolar’s lightweight solar panels were separately tested as part of a complete membrane roof build up. This incorporated the steel subframe, insulation layer, waterproof roof membrane, adhesives and solar module. The results confirms that Polysolar solar technology can be safely integrated into our registered roofing systems without compromising fire safety.
Why does it matter?
For architects, specifiers and building developers, a BRoof(t4) classification provides assurance that Polysolar’s products are suitable for use on building systems where stringent fire safety requirements apply. Achieving this highest rating helps simplify compliance, supports planning and building control approvals and allows greater design flexibility when integrating solar technology.