VAPOR RETARDING FILM AND FOLDING THEREOF

摘要

A vapor retarding film (100) adapted for installation, the film (100) having one or more folds (102a), (102b) and (102c) defining a folded film section (102); an edge margin (104) of the film (100) adapted for fastening to a building wall without requiring complete unfolding of the folded film section (102), by having the edge margin (104) being unfolded in the folded film section (102), and wherein the film (100) is made by folding a length of the film (100) lengthwise of the edge margin (104) and rolling the film lengthwise to form a roll (110).