Foam Board Insulation Rigid Insulation R Value Chart

Because of this i often get questions about which type of foam board insulation to use and what r values these products provide.

Foam board insulation rigid insulation r value chart.

You can even place it under the foundation slab. R value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another. Our r value guide to rigid insulation includes the doe s recommended insulation by zone chart r value calculator and base building material r values chart. 4 5 21.

In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed in your attic to reach r 30 if you live in zones 2 or 3. Rigid insulation is one of the best tools to reduce your energy costs.

8 3 4 4 8 2 20. As a benchmark one inch of solid wood has an r value of 1. I ve written several posts about how to insulation basement walls in which i promote the use of foam board insulation as the first line of defense against moisture and mold. Corrosion problems when in contact with steel roofing moisture.

Understanding r value thursday december 13 2018 what does r value mean. The common denominator among varieties of insulation is the r value. Foam board insulation types. A higher r value means that the insulation will do a better job of holding in conditioned air whether that s heat in the winter or cool air in the summer.

R 0 77 30 phenolic foam insulation r values. Very good air bypass leak sealing properties. They keep your home at a comfortable temperature without the need to crank your heat. 4 8 7 21.

Choose rigid insulation wisely and consider the effect its characteristics will have on the performance of the your project overall product cost and the best way to get the bang for your buck. Phenolic foam spray insulation. Rigid board insulation r value chart written by kupis on september 29 2020 in chart r value insulation r 7 rigid foam insulation 310891 fibergl cellulose or foam which insulation basics attic edition fibergl vs rigid foam insulation. Rigid foam insulation also known as insulating boards provide high r values.

Polyiso insulation thickness r value chart. Rigid foam insulation packs a lot of r value into a thin package but not all rigid foam performs the same. There are three basic foam insulation board products on the.