Insulation Board Under Metal Roofing

Closed cell polyisocyanurate foam core.

Insulation board under metal roofing.

Provides high r value per inch in built up modified bitumen metal roof and single ply roof systems and utilizes an environmentally compliant blowing agent that provides high thermal insulation performance. The problem with using. There are two ways to do this put in firring nailing though nails are not used any more for this strips or purlins in steel frame construction on the roof to support it or place the metal roofing directly on a flat surface like foam insulation board or the roof sheathing with roof water barrier in the correct position in the layer. Start at the bottom of the roof and place the first piece of rigid foam insulation against the metal flashing starting at the center line.

Nail it around the edges with roofing nails. Foam board insulation is easy to cut with a circular saw with a masonry blade or scored with a utility knife and snapped like you would drywall. Foil insulation is a radiant barrier and it works by. Make sure that the insulation you are using is the same thickness so that the metal roof will fit better.

Traditionally we ve insulated the roof panel to try and keep the temperature on the panel from reaching the dew point. 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. Both materials make a great physical barrier between the interior building and the metal roof. The batts are located side to side on the rafter of the roof.

To attach the insulation you can use screws with large washers a special adhesive made for adhering foam board insulation or for smaller pieces you can seal them in with caulk or spray foam. One of the more popular methods of placing metal roofing on a home is to lay down purlins across the existing shingles. We ll add a vapor barrier so the moist air does not flow up through the insulation and condense on the roof.