Putting 1 Foil Faced Ridig Board Under Attic Roof

Installing foam insulation boards in the attic is no that hard and can save you money compared with professional installation.

Putting 1 foil faced ridig board under attic roof. If you want to use them without creating a vapor barrier look for permeable iso panels faced with fiberglass. Installing rigid foam insulation. 2 measure and cut the foam boards as. Select rigid foam insulation boards that are at least 1 2 inch less in thickness than the rafter space is deep if you plan to finish the attic as living space.

Foil insulation is a radiant barrier and it works by. 4 of polyiso under 4 of eps all above the original roof sheathing. Then a second layer of plywood sheathing and asphalt shingles following the steps explained in this article. Cut ap foil faced foam sheathing to fit snuggly between the rafters.

Foam board insulation in the attic can cut down on energy costs and simultaneously promote a more environmentally sound way of daily living. We live in zone 5 suburb of chicago and are hopefully about to put rigid foam above the roof sheathing on just the northeast roof portion of our roof. There s two ways you can go about with foam board insulation. Foil insulation underlayment is recommended under a metal roof and in most cases the shiny side should be facing up but there s a catch.

However foil faced iso panels are warranted as impermeable. Multiple layers of foam board may be required.