How To Install Foam Board Insulation On Roof

It will help you to eliminate problems that may come when the house becomes extremely cold in the winter and terribly hot in the summer.

How to install foam board insulation on roof.

Over the foam you will need something to nail the roofing to usually a solid sheet of plywood or osb. Insulation board should be added between the old and new roof systems to ensure proper insulation and to reflect heat from the outside. Now that you know your options there are just a few more tips that you might need before you get started with installing your rigid foam insulation. Insulated roof assemblies can be vented or unvented.

More insulation on the exterior is good. There are lots of different ways to insulate this type of roof but one of the best methods calls for the installation of rigid foam insulation above the roof sheathing. All foam boards absorb water vapor. Cover the insulation with a vapor barrier before you install it.

Keep foam board insulation away from direct sunlight prior to installation. Available in both foam and rigid form choose the board type. There are at least two good reasons why this approach makes more sense than installing the insulation under the roof sheathing. To save a step i would recommend using a nailbase panel foam preadhered to osb or sometimes plywood on one side only see photo facing page.

Flat roof insulation installation the rigid foam board insulation we used was 2 thick and came in 4 x 8 sheets. It will degrade its r value. The snugness of the foam itself should be sufficient to hold the strips. Polyurethane spray foam metal roof insulation in order to add moisture barrier under metal roof you can spray the undersides of the roof by using a thick layer of polyurethane spray foam.