Open Cell Vs Closed Cell Spray Foam Roof

Open cell foams use water as a blowing agent.

Open cell vs closed cell spray foam roof.

Spray foam roofing can be used to solve your commercial building s toughest challenges inside and out. For example closed cell foam is really the only option for residential roofing adhesive due to its strength characteristics. It is important to be aware of the difference between open cell vs closed celled spray foam insulation cost uk. In this article we cover the difference between open and closed cell spray foam.

There are fewer reports of problems with closed cell spray foam than with open cell spray foam. When it comes to spray foam a few options are depending on your project requirements. Open cell foam is just that open cell. Open and closed cell foam are two different types of spray foam insulation.

Open and closed cell foam insulation use a blowing agent to forms the cells within it. It comes down to understanding the benefits of open cell vs closed cell foam and choosing the type that fits your needs. If an installer was to install the incorrect cell type foam it could cause the insulation to work ineffectively. Since you have already arranged to have 2 inches of closed cell spray foam installed in your floor assembly it seems clear that there is at least one insulation contractor in your area who is willing to install closed cell spray foam.

Now lets get to it. Most closed cell foam used for insulation range from 1 7 lb to 2 lb. We often compare the texture of open cell foam to a sponge or even angel food cake. Closed cell foams use enovate also known as 245fa.

In addition to the situation specific considerations there are more general considerations to make when deciding between open cell and closed cell foam. The main differences between open and closed cell foam are moisture permeability r value and flexibility. If you want to use spray foam here s my advice. Chemical manufacturer s claim if a roof leaks water will migrate through the foam structure therefore not trapping the water.

While it doesn t have as high of an r value as closed cell it is still far more effective and energy efficient than the other traditional products. Closed cell foam can go up to 3 lb density which is often used in exterior roof applications like the superdome. They have different strengths and weaknesses and one is not necessarily better than the other. Closed cell spray foam on the other hand is also called medium density or 2 0 lb foam.

The microscopic cells within open cell foam are just that open which give it a soft fluffy feeling. Common sense tell s me if this is valid marketing then what stops water vapor from moving through the foam under pressure.