Foam Insukation Under 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.

Foam insukation under siding.

Generally referred to as rigid foam insulation this type of foam insulation is. Install it anywhere from the roof to the foundation. This detail is used with both new construction and also with renovation work. Insulated vinyl siding is standard vinyl siding with a backing of solid rigid foam insulation.

How to install rigid foam under siding. Many houses built today have a double wall type of insulation with fiberglass batts fastened between the studs on the inside and rigid foam board over. Foil faced foam board insulation is a great idea but is not a good choice for hot climates or cold climates as an exterior insulation product. Continuous insulation under new siding has become a popular way to improve energy efficiency on an existing home because it addresses a problem known as thermal bridging.

It also serves as an air barrier. Siding over rigid foam a vented drainable air space keeps wood siding dry and stable. 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. Rigid insulation is one of the best tools to reduce your energy costs.

You can even place it under the foundation slab. 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. 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. We will start with hot climates.

Most homes in the united states are built with traditional wood frame construction with studs every 16 on center. Rigid foam insulation also known as insulating boards provide high r values. 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. One new wrinkle for many builders is walls built with fiber insulation between the studs plus rigid foam.