9 Best Of How To Install Vapor Barrier Under Metal Roof HD Image Size. Remove the roof steel install a reflective insulation on top of the purlins and reinstall the roof steel using larger diameter longer screws than what originally held it in place. Mar 05 2020 Underlayment is a vapor barrier or water-resistant material thats put under metal roofing and installed directly onto the roof deck.
Now if you want to add one on the heated side of the ceilingroof under the insulation have at it. Youll get the benefits from it. This one demonstrates how to properly install the Rofco vapor barrier.
Mar 05 2020 Underlayment is a vapor barrier or water-resistant material thats put under metal roofing and installed directly onto the roof deck.
Youll get the benefits from it. In order to add moisture barrier under metal roof you can spray the undersides of the roof by using a thick layer of polyurethane spray foam. Follow all the rules associated with any kind of radium barrier installation. It faces an airspace.