Insulation Under Vinyl Siding

Does foam board insulation under siding help save energy.

Insulation under vinyl siding.

Wall 2 insulated with high density spray foam at a nominal 4 inches in the cavity. One of the biggest advantages to installing exterior rigid foam board insulation is improved. Installing foam board insulation under vinyl siding improved moisture control. 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.

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. 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. Wall 3 r 19 in the cavity plus r6 1 foam board under the vinyl.

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. It also serves as an air barrier. Wall 1 insulated with only r 19. 1 2 polystyrine foam board insulation.

Foil faced foam board insulation. This is typically used to go over the existing siding in order to create an even. Exterior rigid foam board insulation can make a significant difference in overall thermal. 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.