An insulating board

摘要

A fire retardant insulating board 1 comprises a foam core 2 having facings 3, 4 on both faces thereof. The foam core is reinforced by a glass fiber scrim 5 having a weight of from 8 to 24, preferably 10 to 20 and ideally approximately 13.6 g/m<2> of board. To produce the board 1 in a continuous manufacturing process the facings 3, 4 with the scrim 5 and foam reactants are passed under a nip bar 30 to thoroughly wet out the scrim 5 before allowing the foam to expand.