Metrodeck is a fire retardant GRP fibreglass roofing system designed for flat roofs. It combines roofing resin, fibreglass matting and a UV-stable topcoat to create a seamless, waterproof and durable flat roof surface.

Metrodeck is used for flat roofs, extensions, garages, balconies, walkways and commercial roofing projects where a strong, waterproof and fire retardant GRP roofing system is required.

The Metrodeck GRP roofing system is tested to BS476 Part 3 FAA, also referred to as EXT.F.AA for flat roof external fire exposure testing. This means the system is designed to provide strong resistance to fire penetration and surface flame spread when installed as a complete tested system.

BS476 Part 3 is a British Standard external fire exposure test for roof systems. In the EXT.F.AA classification, “F” refers to a flat roof test, the first “A” relates to fire penetration resistance, and the second “A” relates to surface flame spread performance.

Metrodeck roofing kits are available in sizes from 5m² up to 100m². Choose the kit size based on the total roof area and allow extra material for overlaps, edges, trims and detailing.

Metrodeck is designed to help meet external fire performance requirements for flat roofing when used as the correct complete system. However, Building Regulations approval can depend on the full roof build-up, substrate, insulation, project type and location, so it is always recommended to check with local Building Control before starting work.

No. Metrodeck can achieve its BS476 Part 3 fire rating without requiring slate granules on the top surface. Slate granules may still be added where a more textured or non-slip surface finish is required.

The standard Metrodeck topcoat colour is Dark Admiralty Grey BS18B25. This gives the finished roof a clean, professional grey appearance.

Yes, the Metrodeck system is highly durable and suitable for balconies and walkways. However, for areas that will experience regular foot traffic, it is highly recommended to use two layers of 450g fibreglass matting for added strength. You can also add slate granules to the wet topcoat to create a slip-resistant finish.

Metrodeck can be installed by an experienced DIY user on smaller flat roof projects. For commercial buildings, larger roofs, roofs close to boundary lines or projects requiring Building Regulations approval, it is recommended to use an experienced GRP roofing installer.

Metrodeck roofing materials are available with a 20-year material guarantee when the system is installed correctly and used as a complete Metrodeck resin and topcoat system.