Spray Foam Insulation Thickness Attic

Then you can use other forms of insulation like fiberglass or cellulose to add r value now that you have a tight air seal.

Spray foam insulation thickness attic.

Earlier this year i got a question about a home that had spray foam insulation in the attic. Spray foam insulation thickness. Most spray foam is limited to a thickness of 5 5 giving it an r value of 20 but in the more northern areas of the country where the r value is recommended to be at least 30 spray foam is not enough insulation. A lot of builders and homeowners are going with spray foam insulation because of the airtightness benefits but then the questioner mentioned that the spray foam contractor had intentionally left big holes to the outside by not sealing the gable vents.

The problem was that the installer was doing his first spray foam job ever and the thickness of the insulation varied from zero visible roof deck to about 9. Although spray foam insulation has been in use since the 1940s primarily for aircraft for the past 30 years continual product innovation has seen the increased adoption of spray foam insulation in residential and commercial construction. The rapid growth of sprayed foam insulation in building construction thanks in part to its immediate and long term. Spray foam kits are quicker and easier to use plus you get a seamless air barrier and high r value in just 1 inch.

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. 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. This form of insulation is commonly known as two pound foam as it is a rigid insulating material that requires a thickness of 50 mm when applied in the home typically this foam s natural color is yellow when applied in insulation. Image courtesy of d7 spray foam insulation houston tx using spray foam insulation in an unvented attic application.

Light density open cell spray foam ocspf. Unvented attics sometimes called sealed enclosed or encapsulated attics feature insulation on the underside of the roof decking rather than on the attic floor. In a properly insulated spray foam attic the temperature won t be much higher than the house temperature. Choose foam it green spray foam insulation kits and don t settle for less than you deserve.

Unfortunately good average thickness doesn t cut it. The unvented attic space is considered the most effective and up to date building practice particularly by the spray foam industry. Both low density open cell and medium density closed cell spray foam can be used in an unvented attic to provide the needed thermal resistance and airtightness. Nothing unusual about that.

The icc es report for insulstar spray foam from ncfi esr 1615 issued february 1 2005 lists a maximum thickness of only 2 inches. Light density open cell spray foam is commonly known as half pound.