Rigid Foam Under Vinyl Siding

Some people use roofing nails but if a strong gust of wind gets under the siding it may not hold.

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. Apply sealant around windows doors and trim. This detail is used with both new construction and also with renovation work. 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.

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. It is designed to prevent a house from losing heat. Nevertheless some manufacturers have no objection to the installation of vinyl siding over foil faced foam.

The nails have a plastic cap that keeps them from damaging the foam. To secure the foam use two inch cap nails. 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. 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.

Fit the rigid foam insulation snugly and seal all seams with the specialized tape.