1 2 Pound Foam Unvented Roof

Foam tech creates superior insulation and environmental control solutions by installing safe cost effective and environmentally friendly polyurethane foams.

1 2 pound foam unvented roof.

Of cellulose insulation in the rafter cavities the roof shown here has an r value of approximately 63. The roof rafter space was assumed to be filled with sufficient insulation to meet the 2009 irc code values based the doe zone listed in table 1. 5 1 2 inches can be filled or almost filled with 1 2 pound open cell foam or you can go with 3 to 4 inches of 2 pound closed cell foam. There are currently two types of spray polyurethane foam spf insulation used in north american residential construction.

If you don t want to use sips or nailbase read this article tolearn the four basic approaches to insulating unvented roof assemblies. Ocspf is 1 2 pound per cubic foot open cell spray polyurethane foam ccspf is 2 pound per cubic foot closed cell polyurethane foam. Unvented roof assemblies are outlined in the. In the most recent issue of fine homebuilding martin holladay wrote a piece on insulating unvented roof assemblies.

All of these materials are supported by quality assurance testing capabilities that. 1 pound spray foam insulation applied in attic. We re big fans of fine homebuilding. Just have a contractor install spray foam insulation and you will be much happier with an efficient insulation that actually works and controls moisture.

Polyisocyanurate insulation above the sheathing and approximately 91 4 in. We have the capabilities to spray and inject a variety of foam systems to achieve a high r value while providing both effective vapor and air barriers. However i d need to have an airtight seal for the vb to be superfluous. Your comment still stands though there should only be 1 airtight seal.

Ccspf or closed cell medium density spray foam 2 pound or 2 pounds per cubic foot and ocspf or open cell low density spray foam half pound or 0 5 pcf. Unvented roof space article 9 19 1 1. Insulating unvented roof assemblies. The project in question is a new single family dwelling.

Deck for a thick roof rigid foam insulation installed above the roof assembly can create an energy smart roof. It was further assumed that a large enough rafter space was. Since i m attaching the foam to whatever siding is there i haven t ripped out the old insulation yet to take a look i don t know if i ll be able to create an airtight seal. Unvented roof assemblies should be insulated either with air impermeable insulation rigid foam or spray polyurethane foam or with a combination of foam and air permeable insulation.

A roof deck over habitable space is proposed to be insulated with two pound spray foam applied between the joists with no venting between the insulation and the underside of the sheathing. With three layers of 11 2 in. Foam free don t stay stuck in the sci finightmare of foam foam foam.