Rigid Foam Under Vinyl Siding

And even though some manufacturers call it rigid foam insulation for the purpose of vinyl siding it basically has the same insulating value as a piece of plywood.

Rigid foam under vinyl siding.

Apply sealant around windows doors and trim. This detail is used with both new construction and also with renovation work. Nevertheless some manufacturers have no objection to the installation of vinyl siding over foil faced foam. Although rigid foam insulation is more expensive than fiberglass insulation it is more efficient.

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. 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. In a typical situation. The nails have a plastic cap that keeps them from damaging the foam.

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. To secure the foam use two inch cap nails. Heating costs increase every year making insulation more and more important. Fit the rigid foam insulation snugly and seal all seams with the specialized tape.

Rigid foam insulation is one of the most important and efficient forms of insulation.