Rigid Roof Insulation R Value 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.

Rigid roof insulation r value per inch. Smaller sizes are also available. Estimated r value of asbestos insulation per inch for pipe insulation corrugated paper. Polyiso still remains the highest r value per inch of any available insulation. The same insulation will hold more heat the thicker it is installed.

Asbestos cement shingle siding. Asbestos corrugated paper pipe insulation. Asbestos cement board r value. Asbestos loose packed fibers powder.

Jm revised lttr values. 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. Products with foil facing help the panels resist moisture vapor. So you need to know an insulation product s thickness as well as its r value in order to compare it to another product.

Working with home insulation boards insulation panels typically come in 4x8 foot sheets. Jm is proud to be a pima member and have its product third party certified under the pima quality mark program. Asbestos lagging and paste will have a lower value. This material offers the highest r values about r 6 to 6 5.

For a 1 in thick 4 8 panel comes unfaced or with a number of different plastic facings. Jm suggests that design professionals use 5 7 r inch as a design specification for its foam products. Traditional loose fill insulation such as fiberglass or cellulose has an r value between r 2 0 and 3 5 per inch of thickness. It provides about r 5 per inch.