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Flat roof with cavity spray foam plus loose-fill insulation and gypsum board thermal barrier.
Sloped roof with cavity spray foam insulation, strapping, and gypsum board thermal barrier
Wrong – Either this tape was not pressed down firmly or the surface was wet or dirty so the tape is not sticking properly even during construction.
Wrong – If the insulated sheathing will serve as an air barrier and drainage plane, any cuts and seams must be taped or sealed.