Rigid Roof Insulation R Value Per Inch

Thermal conductivity k 0 15.

Rigid roof insulation r value per inch.

Eight inches of poor quality insulation may have a higher and better r value than one inch of top quality insulation. Asbestos cement board r value. For a 1 in thick 4 8 panel comes unfaced or with a number of different plastic facings. Products with foil facing help the panels resist moisture vapor.

Rigid insulation is usually made up of fibrous materials or plastic foams. Jm suggests that design professionals use 5 7 r inch as a design specification for its foam products. The same insulation will hold more heat the thicker it is installed. Asbestos corrugated paper pipe insulation.

Asbestos loose packed fibers powder. Jm is proud to be a pima member and have its product third party certified under the pima quality mark program. It provides about r 5 per inch. Asbestos lagging and paste will have a lower value.

This material offers the highest r values about r 6 to 6 5. 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. Working with home insulation boards insulation panels typically come in 4x8 foot sheets. Traditional loose fill insulation such as fiberglass or cellulose has an r value between r 2 0 and 3 5 per inch of thickness.

Smaller sizes are also available. Asbestos cement shingle siding. Estimated r value of asbestos insulation per inch for pipe insulation corrugated paper. Jm revised lttr values.