ROCKWOOL® expands flat roof range with non-combustible upstand board
In its latest step to help specifiers and contractors mitigate fire risk in the fifth façade, ROCKWOOL has launched HARDROCK UB34, an insulation solution specially designed for parapet walls and upstands on flat roofs which is non-combustible in case of fire.
A robust, thermally efficient upstand insulation board, UB34 combines a dense 50mm slab of ROCKWOOL stone wool insulation bonded to a rigid 6mm fibre cement board making it impact and weather resistant.
HARDROCK UB34 has been fully tested and classified as Euroclass A2-s1, d0, meaning it’s suitable for use on buildings over 18 metres that are affected by the ban on combustible materials.
“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,” said Will Wigfield, Product Manager – Building Envelope at ROCKWOOL UK. “A purpose designed solution, it’s easy to install – and its stone wool core provides an excellent thermal performance.”
HARDROCK UB34 is manufactured with a ROCKWOOL base slab, and 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.