Closed cell spray foam is exactly what it sounds like closed. But what exactly does this mean? This means that the cells are pressed together tightly so that no air or moisture can enter into the foam causing a moisture & water barrier.
This material is also a lot more rigid and stable then open cell which helps add to the structural integrity of your home or building.
Closed cell foam is denser then open cell as you might have guessed. Most open cell foam has a density of about .5 pounds per cubic foot. Closed cell foam can be over three times that, with a density of 1.75 pounds per cubic foot or more.
Closed cell also has a higher R-value of about 6.0 per inch compared to open cells 3.5 per inch.
Expansion is also a key factor to look at. Close cell foam is designed to expands 1 inch while open cell expands to 3 inches of thickness. Closed cell allows for multiple layer of installation if you are wanting to increase r-value, and sound control. Open cells expansion of 3 inches fills the entire cavity in most cases on the first application.
Closed cell foam is the best choice for robust insulating where space is an issue, as it can achieve 2x the R-Value of open cell inside a standard wall. Its rigid nature also adds to the structural integrity of the building and E84 fire rated versions are available. The closed cell also acts as a vapor barrier, so water and moisture will be less likely to get inside the home, and the foam itself is unharmed by water damage. Push the button below to get your free closed cell estimate today.