Rigid Roof Insulation R Value Per Inch

Asbestos lagging and paste will have a lower value.

Rigid roof insulation r value per inch.

Asbestos loose packed fibers powder. 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. Estimated r value of asbestos insulation per inch for pipe insulation corrugated paper. Products with foil facing help the panels resist moisture vapor.

Traditional loose fill insulation such as fiberglass or cellulose has an r value between r 2 0 and 3 5 per inch of thickness. Jm revised lttr values. This material offers the highest r values about r 6 to 6 5. It provides about r 5 per inch.

Asbestos cement shingle siding. For a 1 in thick 4 8 panel comes unfaced or with a number of different plastic facings. Smaller sizes are also available. Working with home insulation boards insulation panels typically come in 4x8 foot sheets.

Jm suggests that design professionals use 5 7 r inch as a design specification for its foam products. Rigid insulation is usually made up of fibrous materials or plastic foams. Polyiso still remains the highest r value per inch of any available insulation. Eight inches of poor quality insulation may have a higher and better r value than one inch of top quality insulation.

Thermal conductivity k 0 15. Asbestos cement board r value. Jm is proud to be a pima member and have its product third party certified under the pima quality mark program. Asbestos corrugated paper pipe insulation.