Foam Insukation Under Siding

This detail is used with both new construction and also with renovation work.

Foam insukation under siding.

How to install rigid foam under siding. Most homes in the united states are built with traditional wood frame construction with studs every 16 on center. 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. Hot climates already have a lot of heat and vinyl siding tends to expand and contract with temperature changes up to 1 if the siding is made of recycled vinyl material.

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. 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. 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. One new wrinkle for many builders is walls built with fiber insulation between the studs plus rigid foam.

Siding over rigid foam a vented drainable air space keeps wood siding dry and stable. 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. Install it anywhere from the roof to the foundation. Below are some of the design details along with the benefits.

You can even place it under the foundation slab. 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. We will start with hot climates. 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. Rigid insulation is one of the best tools to reduce your energy costs. Rigid foam insulation also known as insulating boards provide high r values. They keep your home at a comfortable temperature without the need to crank your heat.