How To Install Insulation Under A Metal Roof

Make sure the product is designed to be used under metal.

How to install insulation under a metal roof.

Install rigid foam insulation over the entire surface of the roof. Lay the plywood perpendicular to the roof joists and. It serves as a moisture barrier as well as a slip sheet. Follow the instructional guide to adhere to proper standards.

Install by using staples. Place the sheets close together but don t let them overlap. We recommend a polypropylene scrim reinforced underlayment made up of multiple layers. Layer building paper over the sheathing to help protect against moisture and leaks.

According to the manufacturer s instructions install the metal roofing panels over the insulation. Insulating a metal shed roof with rigid foam can be done one of three ways by laying the board prior to applying the roof by removing the existing roof and installing new foam board or by insulating the existing metal roof from the inside. Overlap seams by about 3 inches. Use duct tape to seal the seams and further protect against moisture air leaks.

Using staples will allow you to install the insulation easily and quickly. Overlap each sheet. How to insulate a metal roof hunker. It can lie down perfectly under the metal roofing without having to deal with the hassle.

But it is important to make sure that the paper liner is installed correctly between the sheathing and the insulation to prevent mold and mildew. Install with staples the easiest and by far the quickest way to install metal roof insulation is with 1 inch staples. Install plywood or oriented strand board osb to act as structural roof sheathing. Cover the sheets with duct tape but don t go overboard.

Take care the first piece is aligned precisely perpendicular square to the edge. This type of underlayment is critical to a quality roof installation. Space the screws about 12 in 30 cm apart down the entire piece of metal. Leave at least 1 8 inch in between gaps to provide breathable space and avoid moisture.

Another benefit of using staples is that they do not make a large hole when penetrating into the sheathing. Lay the metal roof panels over the insulation. To install foil insulation roll it out parallel to the ridge and cut it with a utility knife starting at the drip edge and working your way up. Take your first sheet of metal and place it on the roof so that it overhangs the edge at least 3 4 in 1 9 cm.