Installing Rigid Foam Insulation On Roof

How to put rigid foam insulation on the roof before putting on shingles 1.

Installing rigid foam insulation on roof.

All foam boards absorb water vapor. Use a straight edge knife or utility knife to cut the panels to size. When installing the foam use caulk or tape for maximum insulation between the material and the board or floor. Put on your roofing safety harness and secure the safety rope to the top of the roof.

Remove existing roofing and non adhered underlayment to expose roof sheathing. After installing several layers of rigid foam above the roof sheathing these workers installed plywood above the rigid foam. Apply continuous air control membrane to existing roof sheathing or implement continuous air control at roof sheathing. Use 2 1 2 inch deck screws to drive the furring strips into the foam and the wood framing beyond.

It will degrade its r value. Nail metal flashing along the edges of the. The furring strips should run vertically from floor to ceiling or from eaves to rafters if you are installing them on a sloped ceiling. Cover the insulation with a vapor barrier before you install it.

Install 1 by 3 furring strips over the insulation panels on top of each stud. Rigid foam offers tremendous boost to a home or office s r value. Install rigid insulation board in multiple layers with joints offset vertically and horizontally between adjacent layers. This type of insulated roof assembly limits thermal bridging through rafters.

The plywood was fastened through the rigid foam to the rafters with long screws. To install measure the foam insulation panels to the roof s dimensions. One of the best benefits of rigid foam insulation is that it offers excellent thermal resistance at around double that of traditional insulation.