House Insulation Under Vinyl Siding

The house has wrap under the siding.

House insulation under vinyl siding.

I get asked if this or that in the in the cavity works as well as foam under the siding. Why insulation under the siding is important. Insulated vinyl siding is standard vinyl siding with a backing of solid rigid foam insulation. I thought i should show why continuous foam under the exterior siding is so important.

In fact you can check if it is a correct insulation installation by pressing on the house siding. Certainteed vinyl siding with the correct rigid foam board backer makes this house look great. 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. If they use a backer board at all contractors will often call it and sell it as insulation board.

It also serves as an air barrier. But herein lies the problem. We will start with hot climates. The windows are being removed and moved out the 2 to line up with the foam board.

I am having the siding removed from our house and 2 foam board but under 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. Most homes in the united states are built with traditional wood frame construction with studs every 16 on center. 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.

Installation of this insulation type under fiber cement siding can create an incredible 600 more energy efficient home. Also during this siding process you may also consider asking your contractor to add foam insulation between the vinyl and the house wrap for increased r value. Will this cause any condensation issues. As many things in building science go you my dear reader have to learn something.

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. The house was build in the 19970 s 2 4 walls and pink insulation between the studs. To be completely efficient this insulation type has to mold perfectly with the inside of your home 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.