Rigid Insulation R Values Thickness

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.

Rigid insulation r values thickness.

For example a wall with 3 fiberglass batting r value of 10 8. 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. Because of this i often get questions about which type of foam board insulation to use and what r values these products provide. 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.

Understanding r value thursday december 13 2018 what does r value mean. 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. 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.

1 844 446 7858 my account. Rigid insulation is usually made up of fibrous materials or plastic foams. Polyiso insulation thickness r value chart. 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.

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.