Rigid Roof Insulation R Value Per Inch

Asbestos loose packed fibers powder.

Rigid roof insulation r value per inch.

Estimated r value of asbestos insulation per inch for pipe insulation corrugated paper. Asbestos corrugated paper pipe insulation. Jm suggests that design professionals use 5 7 r inch as a design specification for its foam products. Products with foil facing help the panels resist moisture vapor.

Working with home insulation boards insulation panels typically come in 4x8 foot sheets. Eight inches of poor quality insulation may have a higher and better r value than one inch of top quality insulation. It provides about r 5 per inch. So you need to know an insulation product s thickness as well as its r value in order to compare it to another product.

Polyiso still remains the highest r value per inch of any available insulation. Traditional loose fill insulation such as fiberglass or cellulose has an r value between r 2 0 and 3 5 per inch of thickness. Asbestos lagging and paste will have a lower value. Asbestos cement board r value.

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. Asbestos cement shingle siding. This material offers the highest r values about r 6 to 6 5. Thermal conductivity k 0 15.

Smaller sizes are also available. 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. Rigid insulation is usually made up of fibrous materials or plastic foams. Jm revised lttr values.