How To Install Insulation Under A Metal Roof

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.

How to install insulation under a metal roof.

Take care the first piece is aligned precisely perpendicular square to the edge. Install with staples the easiest and by far the quickest way to install metal roof insulation is with 1 inch staples. Cover the sheets with duct tape but don t go overboard. It serves as a moisture barrier as well as a slip sheet.

Leave at least 1 8 inch in between gaps to provide breathable space and avoid moisture. 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. Place the sheets close together but don t let them overlap. Another benefit of using staples is that they do not make a large hole when penetrating into the sheathing.

Using staples will allow you to install the insulation easily and quickly. Use your neoprene washer head screws to secure the metal to the sheathing. Once again this is used on cold roof construction. You can easily go through several sheets of insulation and know that they are secure.

Make sure the product is designed to be used under metal. Overlap seams by about 3 inches. Follow the instructional guide to adhere to proper standards. It can lie down perfectly under the metal roofing without having to deal with the hassle.

Install plywood or oriented strand board osb to act as structural roof sheathing. This type of underlayment is critical to a quality roof installation. Use duct tape to seal the seams and further protect against moisture air leaks. 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.

How to insulate a metal roof hunker. Lay the metal roof panels over the insulation. Lay the plywood perpendicular to the roof joists and. Layer building paper over the sheathing to help protect against moisture and leaks.

We recommend a polypropylene scrim reinforced underlayment made up of multiple layers. According to the manufacturer s instructions install the metal roofing panels over the insulation. Space the screws about 12 in 30 cm apart down the entire piece of metal. Overlap each sheet.