cover board
Noun
Meaning
cover board (plural cover boards)
(roofing) An insulation board used over closed cell plastic insulation (e.g., polyisocyanurate) to prevent blistering when used in conjunction with hot bituminous membranes.
Noun
cover board (plural cover boards)
(roofing) An insulation board used over closed cell plastic insulation (e.g., polyisocyanurate) to prevent blistering when used in conjunction with hot bituminous membranes.