Foam Board Insulation Under Siding

How to install rigid foam under siding.

Foam board insulation under siding.

We will start with hot climates. It also serves as an air barrier. It provides an r value of 4 per inch of thickness and is the cheapest type of foam board insulation. But if you use wood clapboard siding foam sheathing can cause trouble.

You can even place it under the foundation slab. The bottom edge of the insulation is shaped to receive the top edge of the siding course below so the pieces overlap. Kingspan insulation r 3 common. 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.

0 56 in x 4 ft x 8 ft 1 unfaced polystyrene foam board insulation item 511270 model 100000050497. Generally referred to as rigid foam insulation this type of foam insulation is. This foam board insulation is the rigid pink or blue panels that can be found at home centers in many different thicknesses. 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.

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. Below are some of the design details along with the benefits. 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. 0 56 in x 4 ft x 8 ft.

Rigid foam insulation also known as insulating boards provide high r values. Foil faced foam board insulation. They keep your home at a comfortable temperature without the need to crank your heat. This detail is used with both new construction and also with renovation work.

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. Eps is used under roofing over foundation walls and beneath siding. Moisture can get trapped between the siding and the foam leading to paint failure and causing clapboards to cup and curl. 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.

The insulation itself can be up to 1 25 inch thick at its thickest point but due to the stepped profile much of the insulation is thinner.