Rigid Foam Under Vinyl Siding

In reality rigid foam board which sometimes comes in fanfold usually only has an insulating factor of r 1 and does not add any appreciable insulation effect to your home.

Rigid foam under vinyl siding.

Nevertheless some manufacturers have no objection to the installation of vinyl siding over foil faced foam. 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. This detail is used with both new construction and also with renovation work. It is designed to prevent a house from losing heat.

Rigid foam insulation is one of the most important and efficient forms of insulation. Although rigid foam insulation is more expensive than fiberglass insulation it is more efficient. Heating costs increase every year making insulation more and more important. Some people use roofing nails but if a strong gust of wind gets under the siding it may not hold.

Apply sealant around windows doors and trim. The nails have a plastic cap that keeps them from damaging the foam. Fit the rigid foam insulation snugly and seal all seams with the specialized tape. In a typical situation.

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.