Insulation Under Vinyl Siding

Foil faced foam board insulation.

Insulation 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. Does foam board insulation under siding help save energy. Wall 2 insulated with high density spray foam at a nominal 4 inches in the cavity. These benefits make insulated vinyl seem like an easy worthwhile upgrade to conventional vinyl but there s a significant cost increase with insulated vinyl and many builders and homeowners question whether the price premium is.

It also serves as an air barrier. This is typically used to go over the existing siding in order to create an even. One of the biggest advantages to installing exterior rigid foam board insulation is improved. By filling the voids behind the siding s stepped profile the insulation makes the complete material stiffer and more resistant to warping and movement than conventional vinyl siding.

For a cavity r value of 24. Wall 3 r 19 in the cavity plus r6 1 foam board under the vinyl. Wall 4 r 19 in the cavity plus r12 2 foam board under the vinyl. Installing foam board insulation under vinyl siding improved moisture control.

Foil faced foam board insulation is a great idea but is not a good choice for hot. The insulation also adds some r value or insulating quality to the siding. Installing foam insulation under vinyl siding is a wise choice for homeowners who are seeking to protect their homes against moisture infiltration as well as improve energy efficiency. Exterior rigid foam board insulation can make a significant difference in overall thermal.