Insulation Under Siding

Installing insulation over moisture or existing rot can create larger headaches later.

Insulation under siding.

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. This detail is used with both new construction and also with renovation work. It also serves as an air barrier. 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.

Insulated vinyl siding is installed with nails as with standard vinyl. I thought i should show why continuous foam under the exterior siding is so important. By glenn hooper june 2 2015. 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.

Generally referred to as rigid foam insulation this type of foam insulation is. It provides an r value of 4 per inch of thickness and is the cheapest type of foam board insulation. To be completely efficient this insulation type has to mold perfectly with the inside of your home siding. The bottom edge of the insulation is shaped to receive the top edge of the siding course below so the pieces overlap.

Most homes in the united states are built with traditional wood frame construction with studs every 16 on center. Eps is used under roofing over foundation walls and beneath siding. This foam board insulation is the rigid pink or blue panels that can be found at home centers in many different thicknesses. Installation of this insulation type under fiber cement siding can create an incredible 600 more energy efficient home.

In fact you can check if it is a correct insulation installation by pressing on the house siding. Why insulation under the siding is important. I get asked if this or that in the in the cavity works as well as foam under the siding. As many things in building science go you my dear reader have to learn something.

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. 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. Below are some of the design details along with the benefits.