Installing Rigid Foam Insulation On Roof

Install 1 by 3 furring strips over the insulation panels on top of each stud.

Installing rigid foam insulation on roof.

The furring strips should run vertically from floor to ceiling or from eaves to rafters if you are installing them on a sloped ceiling. It will degrade its r value. One of the best benefits of rigid foam insulation is that it offers excellent thermal resistance at around double that of traditional insulation. After installing several layers of rigid foam above the roof sheathing these workers installed plywood above the rigid foam.

Keep foam board insulation away from direct sunlight prior to installation. Rigid foam offers tremendous boost to a home or office s r value. To install measure the foam insulation panels to the roof s dimensions. Apply continuous air control membrane to existing roof sheathing or implement continuous air control at roof sheathing.

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. The plywood was fastened through the rigid foam to the rafters with long screws. Use 2 1 2 inch deck screws to drive the furring strips into the foam and the wood framing beyond.

When installing the foam use caulk or tape for maximum insulation between the material and the board or floor. Use a straight edge knife or utility knife to cut the panels to size. This type of insulated roof assembly limits thermal bridging through rafters. Nail metal flashing along the edges of the.

A helpful hint for installation is to use a straight edge along the cut line to ensure the panels fit best. All foam boards absorb water vapor. Unroll roofing felt to cover the plywood on the roof and nail it in place.