Installing Roof Insulation Board

How to install insulation board over an existing roof membrane 1.

Installing roof insulation board.

Insert the pry bar. Remove all existing flashing material from around vents and pipes using a pry bar and hammer. Use 2 2 inch lumber for the studs and 2 3 inch lumber for the top and bottom plates. 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.

How to cut and fit insulation boards trc top tips. Adding the roof sheathing sheets of 4 x8 osb were then laid directly on top of the rigid foam insulation boards leaving small gaps per the manufacturer s recommendation to avoid buckling at the seams. Secondly and this is the best way you can install a drywall to frame the wall before applying foam board insulation. Calculate the total square footage of the roof to determine the number of.

You can easily go through several sheets of insulation and know that they are secure. 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. Another benefit of using staples is that they do not make a large hole when penetrating into the sheathing. Using the perimeter marks for the ceiling joists chalk lines were snapped to indicate where to screw down the sheathing.

The easiest and by far the quickest way to install metal roof insulation is with 1 inch staples.