Rigid Foam Insulation Under Vinyl Siding

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

Rigid foam insulation under vinyl siding.

To secure the foam use two inch cap nails. The nails have a plastic cap that keeps them from damaging the foam. The by the book answer to your question is that vinyl siding manufacturers require a flat solid supportive surface and limit foam installed under their siding to a maximum of 1 in. Exterior rigid foam board insulation can make a significant difference in overall thermal.

Always follow the manufacturer s instructions for installing rigid foam insulation. Nevertheless some manufacturers have no objection to the installation of vinyl siding over foil faced foam. Apply sealant around windows doors and trim. 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. One of the biggest advantages to installing exterior rigid foam board insulation is improved. 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. 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.

Some people use roofing nails but if a strong gust of wind gets under the siding it may not hold. In a typical situation. It is designed to prevent a house from losing heat. 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.