Rigid Foam Insulation Under Sheathing

3 benefits of rigid foam sheathing.

Rigid foam insulation under sheathing.

Insulfoam rigid foam is a high performance built to spec sheathing insulfoam rigid foam is a high performance built to spec sheathing insulation that provides superior r value and moisture resistance. Below are some of the design details along with the benefits. Polyiso consists of a uniform closed cell polyisocyanurate foam core and provides one of the highest r values per inch of any rigid insulation. Updated on july 20 2015.

Plywood has an r value of 1 25 and fiberglass batts have an r value of 3 14. You can even place it under the foundation slab. Foam board sheathing insulation johns manville polyiso foam sheathing insulation boards provide a continuous layer of insulation to reduce thermal bridging and improve energy efficiency. This foam board insulation is the rigid pink or blue panels that can be found at home centers in many different thicknesses.

I just had a quick question. More effective insulation with r values ranging from 3 6 to 8 0 rigid foam sheathing has much better insulation per inch than other materials i e. Eps is used under roofing over foundation walls and beneath siding. They keep your home at a comfortable temperature without the need to crank your heat.

You will want to make sure that you have enough r value in that rigid insulation so that you will not be creating a condensation point on the inside of the wall. This detail is used with both new construction and also with renovation work. Install it anywhere from the roof to the foundation. Rigid insulation is one of the best tools to reduce your energy costs.

Although gba has published many articles and videos on the topic we continue to receive frequent questions from readers asking how to install rigid foam sheathing on exterior walls so it s time to provide a primer on the topic. What s the best way to install foam insulation on the outside of a wall. Rigid foam insulation also known as insulating boards provide high r values. It provides an r value of 4 per inch of thickness and is the cheapest type of foam board insulation.

It is offered in multiple thicknesses and dimensions in both square edged and tongue and groove joints.