Rigid Foam Roof Insulation Installation

All three types of rigid foam insulation expanded polystyrene eps extruded polystyrene xps and polyisocyanurate are suitable for use on the exterior of walls and roofs though they do not perform equally.

Rigid foam roof insulation installation.

Rigid insulation is one of the best tools to reduce your energy costs. Install 1 by 3 furring strips over the insulation panels on top of each stud. Use 2 1 2 inch deck screws to drive the furring strips into the foam and the wood framing beyond. The plywood was fastened through the rigid.

Foam board insulation is easy to use and is a great diy way to add some insulation. When installing the foam use caulk or tape for maximum insulation between the material and the board or floor. Exterior rigid foam improves air tightness adds r value reduces the chance of condensation in wall cavities and greatly reduces thermal bridging through studs. Cover the insulation with a vapor barrier before you install it.

Nail it around the edges with roofing nails. They keep your home at a comfortable temperature without the need to crank your heat. This type of insulated roof assembly limits thermal bridging through rafters after installing several layers of rigid foam above the roof sheathing. All foam boards absorb water vapor.

One of the best benefits of rigid foam insulation is that it offers excellent thermal resistance at around double that of traditional insulation. Install rigid insulation board in multiple layers with joints offset vertically and horizontally between adjacent layers. It comes in standard size 4 8 sheets and smaller sizes in many different thicknesses from 1 4 inch to 2 inches. A helpful hint for installation is to use a straight edge along the cut line to ensure the panels fit best.

It will degrade its r value. Eps is the most vapor permeable of the three types. The furring strips should run vertically from floor to ceiling or from eaves to rafters if you are installing them on a sloped ceiling. Apply continuous air control membrane to existing roof sheathing or implement continuous air control at roof sheathing.

Keep foam board insulation away from direct sunlight prior to installation. Not only that foam sheathing will soon be mandated by code in some climate zones. At r 4 it also has the lowest r value per inch. To install measure the foam insulation panels to the roof s dimensions.

Rigid foam offers tremendous boost to a home or office s r value. You can even place it under the foundation slab. A roof over a vented unconditioned attic does not need to include any insulation. Rigid foam insulation also known as insulating boards provide high r values.

Remove existing roofing and non adhered underlayment to expose roof sheathing.