Hard Metal Board
A high performance rigid polyisocyanurate insulation board with tongue & groove joints.
It is faced on the upper side with an 18mm OSB3 sheet and on the rear with a gas tight multi- layer aluminium facing.
Hard Metal Board is a warm roof substrate suitable for copper, zinc, aluminium, coated steel & stainless steel roofing systems.
It is recommended that a vapour barrier such as Alutrix 600 is laid beneath the board.