Rigid Insulation R Value Per Thickness

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.

Rigid insulation r value per thickness.

For example a wall with 3 fiberglass batting r value of 10 8. It provides r values that range from 3 6 to 4 2 per inch. 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 astm c578 and a method of accelerated aging sometimes called long term thermal resistance lttr per can ulc s770 03. Xps comes unfaced or with a number of different plastic facings.

It provides about r 5 per inch. Choose this option for areas that need a good amount of strength and water resistance. 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.

Rigid insulation is usually made up of fibrous materials or plastic foams. Thickness inches r value in i p imperial rsi r value in metric 0 5. Typically a higher insulation r rating means better climate control and better energy efficiency for your home. Some products have reinforced facing to make them sturdier.

Also called styrofoam insulation this is the least expensive material. The importance of insulation thickness. For every type and material of insulation check the r value per inch of thickness that the manufacturer has listed. The r value at 180 day real.

Traditional loose fill insulation such as fiberglass or cellulose has an r value between r 2 0 and 3 5 per inch of thickness. R value isn t just a time measurement though. R value chart for enerfoil tm rigid foam faced insulation. A higher insulation r value usually means a higher price point as well.

For a 1 in thick 4 8 panel comes unfaced or with a number of different plastic facings. Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. It takes into account the. 1 844 446 7858 my account.

Conditioned per atsm c1289 test method astm c518 1 2.