Open Cell Spray Foam Attic

It rots roofs people have told me.

Open cell spray foam attic.

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. Spent less than a full day to complete the project. Open cell foams use water as a blowing agent. Open cell spray foam insulation is a great choice for attics and the underside of the roof deck.

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. Open and closed cell foam insulation use a blowing agent to forms the cells within it. Fire retardant open cell spray foam insulation class 1 e. An open cell foam low density spray polyurethane is a spray applied to provide continuous insulation and an air sealing barrier.

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

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. Open cell foam weighs 1 2 pound per cubic foot and closed cell weighs 2 lbs per cubic foot. This makes the foam a softer more flexable material. It was extremely easy to get the hang of it and was easy enough to do it by myself.

For closed cell spray foam the r value is 12. For an open cell the r value is 7. The spray foam insulation or spray polyurethane foam spf is a popular alternative to traditional building insulation such as fiberglass. 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.

Light density open cell spray foam insulation and medium density closed cell spray foam insulation. In other words the cells are deliberatly left open. Spray foam lasts roughly 80 years before beginning to deteriorate. I am considering having the r45 blown cellulose on the attic floor removed and replaced with r30 open cell spray foam ocsf.

Open cell foam is full of cells that aren t completely encapsulated. A recommended technician says that we will be better off with the foam due to its air sealing properties. Closed cell foams use enovate also known as 245fa. 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.

Should i use spray foam insulation in my attic. The myth that open cell is more economical is bullshit.