Labels:chat room | hakham | web site | window OCR: Prev Next Water Management of the Building Envelope Roofing Underlayments Extremely LowP erm Underlavment What are its limitations? Temperature fire long term exposure and solvents limit the effectiveness of low- density polyethylene What is its comparative cost? Varies with substrate (floor and wall framing) configuration lapped or air tight sealed joints sealing reguirements to surrounding construction and height of building 48 Perm Termperature requirements