R 30 Spray Foam Insulation Thickness

Insulstar spray foam insulation is a spray applied semi rigid cellular polyurethane foam plastic insulation having a maximum thickness of 2 inches and a nominal density of 2 0 pcf.

R 30 spray foam insulation thickness. For example energy star recommends r 30 for a roof in the southern united states r 38 for the middle of the country and r 49 for the northern part of the country. If you d like to start saving money and time today buy foam it green spray foam insulation now or call us at 800 516 0949. Insulation level are specified by r value. Spray foam kits are quicker and easier to use plus you get a seamless air barrier and high r value in just 1 inch.

The table below shows what levels of insulation are cost effective for different climates and. Recommended home insulation r values. To get to an r 25 you ll need to install an average of around 4 inches of spray foam. Roof assemblies that combine spray foam with a fluffy insulation like fiberglass or.

Choose foam it green spray foam insulation kits and don t settle for less than you deserve. Spray foam insulation r values. Amongst all of the popular types of insulation currently used by the industy spray foam insulation features the highest r value per inch. Insulation thickness to reach the r 30 value depends on the insulation material but fiberglass batts of r 30 insulation are 9 1 2 inches thick.

The icc es report for insulstar spray foam from ncfi esr 1615 issued february 1 2005 lists a maximum thickness of only 2 inches. May 6 2019 now generically speaking we usually recommend open cell spray foam to be 6 to 10 inches on a roof deck or ceiling and 3 inches in the walls. As a benchmark one inch of solid wood has an r value of 1. Spray polyurethane foam has an r value of 6 6 per square inch of thickness.

For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed in your attic to reach r 30 if you live in zones 2 or 3. Rigid foam insulation provides the same r factor with approximately one half the thickness. Jun 11 2018 i intend to use closed cell foam in the roof walls and floor. A writer using the nickname z builder responded.

The higher the r value the better the thermal performance of the insulation. R value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another.