Sentences with phrase «holds the cell rigid»

Not exact matches

Roof Assembly: R - 60 (nominal) vented attic: existing slate shingles, underlayment, and board sheathing; in knee wall and at sloped ceilings, 1» layer of polyisocyanurate rigid insulation between rafters, held away at least 1» from board sheathing, covered with closed - cell spray foam; attic above flat ceiling has deep layer of cellulose.