Rigid Foam Under Vinyl Siding

Heating costs increase every year making insulation more and more important.

Rigid foam under vinyl siding.

This detail is used with both new construction and also with renovation work. Rigid foam insulation is one of the most important and efficient forms of insulation. Installing foam board insulation under vinyl siding today more than ever before homes are being built with foam board insulation installed on the outside of the sheathing and under the siding. In a typical situation.

To secure the foam use two inch cap nails. Some people use roofing nails but if a strong gust of wind gets under the siding it may not hold. Nevertheless some manufacturers have no objection to the installation of vinyl siding over foil faced foam. Apply sealant around windows doors and trim.

Fit the rigid foam insulation snugly and seal all seams with the specialized tape. Whenever vinyl siding is installed over rigid foam with or without foil facing studs should be spaced no more than 16 inches on center and the thickness of the foam should be limited to 1 inch. It is designed to prevent a house from losing heat. Although rigid foam insulation is more expensive than fiberglass insulation it is more efficient.

Almost any type of siding can be installed over the rigid foam cedar or redwood planks exterior plywood sheets cement fiber board or vinyl siding are common options.