Rigid Insulation R Values

These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.

Rigid insulation r values.

You can even place it under the foundation slab. The fibrous materials such as wood cane or vegetable fibers are mixed with fillers and binders to form insulation boards. R values vary depending on many factors including the mean temperature at which the test is conducted and the age of the sample at the time of testing. There are three basic foam insulation board products on the.

Notes on the r value k values of different forms of asbestos. Foam board insulation types. Rigid insulation r value by comparison usually ranges from r 4 0 to 6 5 and may get as high as r 8 7 depending on the insulation material. R values vary depending on many factors including the mean temperature at which the test is conducted and the age of the sample at the time of testing.

Rosato asbestos insulation is the most authoritative source on asbestos properties and gives data for the thermal conductivity of asbestos in different forms and with varying temperatures for magnesia asbestos insulation at mean temperatures ranging from 100 f to 400 f the k value thermal. Because rigid foam plastic insulation products are not all aged in accordance with the same standards it is useful to publish comparison r value data. They keep your home at a comfortable temperature without the need to crank your heat. Rigid foam insulation packs a lot of r value into a thin package but not all rigid foam performs the same.

Rigid insulation is usually made up of fibrous materials or plastic foams. 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. Notes to the table above.

Rigid foam insulation also known as insulating boards provide high r values. Install it anywhere from the roof to the foundation. 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. 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.

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