Rigid Insulation R Value Per Thickness

Traditional loose fill insulation such as fiberglass or cellulose has an r value between r 2 0 and 3 5 per inch of thickness.

Rigid insulation r value per thickness.

Conditioned per atsm c1289 test method astm c518 1 2. 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. R value isn t just a time measurement though.

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. 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. Unfaced 1 in thick xps has a perm rating of around 1 making it semipermeable.

It provides about r 5 per inch. For example a wall with 3 fiberglass batting r value of 10 8. A higher insulation r value usually means a higher price point as well. Choose this option for areas that need a good amount of strength and water resistance.

Some products have reinforced facing to make them sturdier. R value chart for enerfoil tm rigid foam faced insulation. 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. 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.

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. For every type and material of insulation check the r value per inch of thickness that the manufacturer has listed.

It takes into account the. 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. Thickness inches r value in i p imperial rsi r value in metric 0 5. The r value at 180 day real.

Also called styrofoam insulation this is the least expensive material.