Open Cell Vs Closed Cell Spray Foam Roof Humid Climate

Because of this closed cell foam is much more rigid and stable than open cell foam.

Open cell vs closed cell spray foam roof humid climate.

Quick cure best seller kit 605 sf coverage best seller kit 205 sf coverage. We often compare the texture of open cell foam to a sponge or even angel food cake. Folks i have got news for you regarding the open cell closed cell thing. Closed cell foam is made up of cells that are as the name suggests completely closed.

It has a relatively high vapor permeance 3 perms at a thickness of 6 allowing water vapor to migrate to the roof decking at night and back into the attic air in the daytime. In addition to the situation specific considerations there are more general considerations to make when deciding between open cell and closed cell foam. There is no wrong answer. Kit 60 sf coverage.

Fire rated e84 kit 605 sf coverage. Closed cell foam is much denser than open cell foam. Kit 205 sf coverage. Closed cell spray foam on the other hand is also called medium density or 2 0 lb foam.

The role of open cell spray foam. Since vapor retarder paint wont work unless drywall is first installed on the interior side of the closed cell spray foam and since installing drywall is expensive most cold climate builders avoid the use of open cell spray foam in attics. The microscopic cells within open cell foam are just that open which give it a soft fluffy feeling. It rots roofs people have told me.

Most open cell foam has. Low density open cell is better than high density closed cell or is it vice versa. Open cell spray foam insulation doesn t store the moisture. So what is it with the family food fight.

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. Kit 340 sf coverage. It s the wood decking that stores the moisture though. Murmurs and hearsay about open cell spray foam insulation have been gaining traction for a while.

On the interior side of any open cell spray foam installed on the underside of roof sheathing. For example closed cell foam is really the only option for residential roofing adhesive due to its strength characteristics. Spray polyurethane foam spf can do stuff that no other stuff can do. It s just a pathway.

280dc uv protecting paint for foam.