How To Install Insulation Under A Metal Roof

Layer building paper over the sheathing to help protect against moisture and leaks.

How to install insulation under a metal roof.

Once again this is used on cold roof construction. It serves as a moisture barrier as well as a slip sheet. Overlap seams by about 3 inches. 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.

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. Using staples will allow you to install the insulation easily and quickly.

Place the sheets close together but don t let them overlap. How to insulate a metal roof hunker. Follow the instructional guide to adhere to proper standards. Use duct tape to seal the seams and further protect against moisture air leaks.

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. According to the manufacturer s instructions install the metal roofing panels over the insulation. Install plywood or oriented strand board osb to act as structural roof sheathing. Make sure the product is designed to be used under metal.

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. Take care the first piece is aligned precisely perpendicular square to the edge. You can easily go through several sheets of insulation and know that they are secure. 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.

Use your neoprene washer head screws to secure the metal to the sheathing. Install with staples the easiest and by far the quickest way to install metal roof insulation is with 1 inch staples. This type of underlayment is critical to a quality roof installation. We recommend a polypropylene scrim reinforced underlayment made up of multiple layers.

Install by using staples. Lay the plywood perpendicular to the roof joists and. Cover the sheets with duct tape but don t go overboard. Overlap each sheet.