Rigid Insulation R Value Per Thickness

Rigid insulation is usually made up of fibrous materials or plastic foams.

Rigid insulation r value per thickness.

Also called styrofoam insulation this is the least expensive material. 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. 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. 1 844 446 7858 my account.

For example a wall with 3 fiberglass batting r value of 10 8. Conditioned per atsm c1289 test method astm c518 1 2. It provides r values that range from 3 6 to 4 2 per inch. A higher insulation r value usually means a higher price point as well.

R value isn t just a time measurement though. It provides about r 5 per inch. Unfaced 1 in thick xps has a perm rating of around 1 making it semipermeable. Some products have reinforced facing to make them sturdier.

For a 1 in thick 4 8 panel comes unfaced or with a number of different plastic facings. The r value at 180 day real. Typically a higher insulation r rating means better climate control and better energy efficiency for your home. 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.

Xps comes unfaced or with a number of different plastic facings. Thickness inches r value in i p imperial rsi r value in metric 0 5. For every type and material of insulation check the r value per inch of thickness that the manufacturer has listed. The importance of insulation thickness.

Choose this option for areas that need a good amount of strength and water resistance. Traditional loose fill insulation such as fiberglass or cellulose has an r value between r 2 0 and 3 5 per inch of thickness. Easily recognized by its blue green or pink color xps falls in the middle of the three types of rigid foam insulation in both cost and r value about r 5 per inch. Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system.

R value chart for enerfoil tm rigid foam faced insulation.