Spray Foam Roof Insulation Thickness

But what thickness is most beneficial to my roof.

Spray foam roof insulation thickness.

Open cell spray foam is a perfectly acceptable insulation product to use in attics. But spray foam insulation used at the underside of the roof deck would need to be covered by a thermal barrier and intumescent coatings are commonly used. Homes insulated with it can be some of the most efficient and comfortable homes built. Again the thickness or thermal resistance of the high density closed cell spray foam is specified by the international residential code irc based on climate zone.

The icc es report for insulstar spray foam from ncfi esr 1615 issued february 1 2005 lists a maximum thickness of only 2 inches. Do it right and your roof will not rot. The rapid growth of sprayed foam insulation in building construction thanks in part to its immediate and long term. Beware of roofers in homes with spray foam insulation.

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 1 question to ask before putting spray foam in your attic. You ll find it used for ceilings walls and roofs. 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.

You may be wondering spray foam roofs get spray applied meaning they can be a inch 2 inches or 10 inches or really any thickness a spray foam applicator feels like doing. Spray foam insulation cost may be a more expensive option in the beginning but in as little as 1 3 years you will have made the money back by the amount you save in your. Open cell spray foam insulation. Spray foam insulation comes in two types open cell and closed cell.

A 3 in thick layer of open cell spray foam has a permeance grade of 16. I can also tell you that 73 of all statistics are made up on the spot so please don t ask for. Spray foam kits are quicker and easier to use plus you get a seamless air barrier and high r value in just 1 inch. Most low slope roof construction using spray foam use a hybrid approach where a combination of high density closed cell spray foam is used with fiberglass or cellulose insulation.

There you have it. Open cell spray foam has a low density which makes it vapor permeable. The movement of air into indirect conditioning of an unvented attic is a slow gradual process that will not be noticeable by occupants and typically will not put any strain on the hvac system. Choose foam it green spray foam insulation kits and don t settle for less than you deserve.

Does your spray foam insulation need a thermal or ignition barrier. What s the recommended thickness of a spray foam roof. Spray foam insulation is a great product. I don t want the costs of applying additional foam to outweigh the benefits it will provide.