ROCKWOOL expands its flat roof range with a non-combustible upstand board

HARDROCK UB34 has been fully tested and classified as Euroclass A2-s1, d0
HARDROCK UB34 has been fully tested and classified as Euroclass A2-s1, d0

In its latest step to help specifiers and contractors mitigate fire risk in the fifth façade, ROCKWOOL has launched HARDROCK UB34, a non-combustible insulation solution especially designed for parapet walls and upstands on flat roofs.

ROCKWOOL has created UB34 to provide a robust, thermally efficient upstand insulation board that is also non-combustible in case of a fire. Combining a dense 50mm slab of ROCKWOOL stone wool insulation bonded to a rigid 6mm fibre cement board, the system is impact and weather resistant.

Thanks to its stone wool core, HARDROCK UB34 has been fully tested and classified as Euroclass A2-s1, d0. This means the product is suitable for use on buildings over 18m that are affected by the ban on combustible materials.

Will Wigfield, product manager at ROCKWOOL UK, said: “UB34 helps specifiers and contractors mitigate fire risk by providing a durable, non-combustible insulation solution compliant with the latest guidance for buildings over 18m. A purpose designed solution, it is easy to install – and its stone wool core provides an excellent thermal performance.”

HARDROCK UB34 is manufactured with a ROCKWOOL base slab, which has thermal conductivity of 0.034 W/mK, helping to reduce thermal bridging through roof upstands. The board is compatible with a range of flat roof systems, including single-ply and inverted.

www.rockwool.com/uk/flat-roof-hub