Insulation Under Vinyl Siding

An honest professional vinyl siding contractor will tell you exactly what you re getting.

Insulation under vinyl siding.

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. I get asked if this or that in the in the cavity works as well as foam under the siding. Insulated vinyl siding is standard vinyl siding with a backing of solid rigid foam insulation. Before installing vinyl siding over existing wood siding or wall sheathing the wood must be dry and in good condition.

This detail is used with both new construction and also with renovation work. It also serves as an air barrier. To be completely efficient this insulation type has to mold perfectly with the inside of your home siding. We will start with hot climates.

Why insulation under the siding is important. Generally referred to as rigid foam insulation this type of foam insulation is. There are insulated rigid foam products that will increase the insulation factor but you ll pay much more for r 5 to r 7. 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.

So if you re comparing proposals to install new vinyl siding on your home please be aware of this important fact. Most homes in the united states are built with traditional wood frame construction with studs every 16 on center. Installing insulation over moisture or existing rot can create larger headaches later. Below are some of the design details along with the benefits.

How to install rigid foam 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. By glenn hooper june 2 2015. I thought i should show why continuous foam under the exterior siding is so important.

As many things in building science go you my dear reader have to learn something. Installation of this insulation type under fiber cement siding can create an incredible 600 more energy efficient home. 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. 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.