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.

Foam insulation provides an air barrier to wherever it is applied to help mitigate air leakage from the building. There can be a significant difference between the thickness of what your spray foam insulation requires to provide protection compared to what your local building codes mandate. The best part of using foam it green spray foam on an attic floor is you only need 1 inch cured thickness to seal the living spaces you use from the attic. Earlier this year i got a question about a home that had spray foam insulation in the attic.

Foam insulation as an air sealing material. This application effectively seals off the attic from the outdoors and eliminates air leakage and infiltration through the attic and roof areas. Spray foam expands after it is applied allowing even the smallest cracks and crevices to be covered and well insulated. The icc es report for insulstar spray foam from ncfi esr 1615 issued february 1 2005 lists a maximum thickness of only 2 inches.

This is compared to having to stack fiberglass as high as 14 16 inches to get the same results. So if the ideal r value for your home is r 40 your contractor may only need to spray five inches of foam 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. For spray foam insulation in los angeles call us today.

Only spray polyurethane foam can be used for this application as batt insulation will end up sagging and blown insulation simply can t adhere to the roof decking. Spray foam kits are quicker and easier to use plus you get a seamless air barrier and high r value in just 1 inch. Spray foam insulation offers the highest r value in insulation. It provides you with more thermal and sound protection using less thickness.

Choose foam it green spray foam insulation kits and don t settle for less than you deserve. 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. One of the key differentiators between traditional insulation materials and spray foam insulation is the latter s ability to insulate and air seal. Nothing unusual about that.