Rigid Insulation R Value Per Thickness

R value chart for enerfoil tm rigid foam faced insulation.

Rigid insulation r value per 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. Some products have reinforced facing to make them sturdier. Also called styrofoam insulation this is the least expensive material. It provides about r 5 per inch.

Thickness inches r value in i p imperial rsi r value in metric 0 5. 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. Conditioned per atsm c1289 test method astm c518 1 2. The r value at 180 day real.

For a 1 in thick 4 8 panel comes unfaced or with a number of different plastic facings. It provides r values that range from 3 6 to 4 2 per inch. Falls in the middle of the three types of rigid foam insulation in both cost and r value used most in walls or below grade applications recyclable and at about r 5 per inch costs around 42 per sq. Choose this option for areas that need a good amount of strength and water resistance.

1 844 446 7858 my account. 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. Xps comes unfaced or with a number of different plastic facings. Typically a higher insulation r rating means better climate control and better energy efficiency for your home.

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. For example a wall with 3 fiberglass batting r value of 10 8. For every type and material of insulation check the r value per inch of thickness that the manufacturer has listed. A higher insulation r value usually means a higher price point as well.

Traditional loose fill insulation such as fiberglass or cellulose has an r value between r 2 0 and 3 5 per inch of thickness. Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. Unfaced 1 in thick xps has a perm rating of around 1 making it semipermeable. R value isn t just a time measurement though.

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