Rigid Insulation R Values Thickness

There are three basic foam insulation board products on the.

Rigid insulation r values thickness.

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. Polyiso insulation thickness r value chart. 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. In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and an inch of blown cellulose in an attic has an r value of 3 2 3 7.

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. 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. 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. The r value for foamular xps insulation is provided from testing at two mean temperatures 40ºf and 75ºf and from two aging conditioning techniques 180 day realtime aged as mandated by.

Rigid insulation is usually made up of fibrous materials or plastic foams. 1 844 446 7858 my account. Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. Traditional loose fill insulation such as fiberglass or cellulose has an r value between r 2 0 and 3 5 per inch of thickness.

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