Open Cell Spray Foam Attic

I am considering having the r45 blown cellulose on the attic floor removed and replaced with r30 open cell spray foam ocsf.

Open cell spray foam attic.

How long does spray foam roofing last. A spray insulation is referred to open cell or closed cell because of the difference between the small bubbles cells that make up the foam. For closed cell spray foam the r value is 12. Some spray foam manufactures have tested primer coating products that result in the formulation of a class ii vapor retarder directly on the surface of the open cell spray foam.

This makes the foam a softer more flexable material. This spray foam is applied as a low or high pressure two component polyurethane spray foam that can be applied onto walls in unvented attics to ducts and ceilings and in vented attics and. Spent less than a full day to complete the project. Open cell foam is full of cells that aren t completely encapsulated.

It was extremely easy to get the hang of it and was easy enough to do it by myself. Open cell foams use water as a blowing agent. For an open cell the r value is 7. Not long ago someone even told me that in florida roofing companies won t let their workers go up on roofs with open cell spray foam because the roofs are so spongy the guys fall right through.

Murmurs and hearsay about open cell spray foam insulation have been gaining traction for a while. Open cell spray foam kits fire rated anti microbial i purchased two 602 closed cell foam kits and one 1202 open cell spray foam kit to insulate my attic. Should i use spray foam insulation in my attic. Light density open cell spray foam insulation and medium density closed cell spray foam insulation.

Open and closed cell foam insulation use a blowing agent to forms the cells within it. The spray foam insulation or spray polyurethane foam spf is a popular alternative to traditional building insulation such as fiberglass. Open cell spray foam insulation is a great choice for attics and the underside of the roof deck. This type of spray polyurethane foam can be classified into two different types.

Fire retardant open cell spray foam insulation class 1 e. Open cell foam weighs 1 2 pound per cubic foot and closed cell weighs 2 lbs per cubic foot. In other words the cells are deliberatly left open. The myth that open cell is more economical is bullshit.

Spray foam lasts roughly 80 years before beginning to deteriorate. There is 300 difference there but the cost they give you is about a third difference and open cell foam at 12 inches will not give you the performance of 2 inches of closed. Closed cell foams use enovate also known as 245fa. Open cell spray foam can also be used to create an unvented attic in cold climate zones provided code requirements for a vapor retarder are followed.

Troy s beverly ma the world s only. Plus he can better insulate the ducts and small furnace room with the ocsf.