Installing Rigid Insulation On Roof

First the foam will increase thermal performance by adding r value and minimizing thermal bridging.

Installing rigid insulation on roof.

Scope remove existing roofing and non adhered underlayment to expose roof sheathing. Put on your roofing safety harness and secure the safety rope to the top of the roof. Once the roof demo was complete and the flat roof was cleared of any remaining debris some rotted 2x material around the perimeter of the roof was replaced. Rigid foam offers tremendous boost to a home or office s r value.

How to put rigid foam insulation on the roof before putting on shingles 1. The 1x roofing boards which also made up the ceiling of the. A helpful hint for installation is to use a straight edge along the cut line to ensure the panels fit best. Use a straight edge knife or utility knife to cut the panels to size.

The furring strips should run vertically from floor to ceiling or from eaves to rafters if you are installing them on a sloped ceiling. Install rigid insulation board in multiple layers with joints offset vertically and. Firstly you can apply it directly onto the house s concrete walls with the help of a construction adhesive that will hold it in place. Installing rigid foam insulation there s two ways you can go about with foam board insulation.

Depending on the depth of your ceiling look into the various sizes available. Apply continuous air control membrane to existing roof sheathing or implement continuous air control at roof sheathing. This type of insulated roof assembly limits thermal bridging through rafters. To install measure the foam insulation panels to the roof s dimensions.

2 inch foam will probably work fine however rigid foam insulation is available in various sizes. 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. One of the best benefits of rigid foam insulation is that it offers excellent thermal resistance at around double that of traditional insulation.

You can easily install several sheets of the insulation in only a few minutes without worrying about the security. Standing on the step ladder press the foam against the top of the ceiling. Using staples will allow you to install the insulation easily and quickly. Flat roof insulation installation the rigid foam board insulation we used was 2 thick and came in 4 x 8 sheets.

The benefits of adding a layer of rigid foam insulation to the exterior of walls and roofs are twofold. Second the foam will keep the sheathing warm so moisture passing through the wall or roof will find no cold surfaces for condensation to occur. Unroll roofing felt to cover the plywood on the roof and nail it in place. Install 1 by 3 furring strips over the insulation panels on top of each stud.

Nail metal flashing along the edges of the. By martin holladay april 3 2015.