with 52 + / - 2 kg/ m3 PIR density, 20mm thickness, coated on both side with 80 micron thick aluminium foil, embossed on one side, smooth on the other side, both coupled with layers of corrosion....
with 52+ / - 2 kg/ m3 PIR density, 20mm thickness, coated on one side with 80 micron thick aluminium foil coupled with layers of corrosion resistant paint, and 225 micron aluminium composite colour....