The Difference Between Closed Cell & Open Cell Insulation

Considering using spray foam insulation for your forthcoming projects? You can use both open-cell foam and closed-cell foam for insulating your house, although the method for using each will differ. To help you choose the correct foam for your project, we’ll explain the distinctions between the open and closed-cell foam.

The Difference Between Closed Cell & Open Cell Insulation

It occurs in open and closed cell forms. They both have defects and strengths, yet none is superior to the other. To have the best of both worlds, you must understand both open and closed cell pros and cons.

The two forms of foam are open cell and closed cell.

• Spray insulation is categorized as open cell or closed cell based on the size of the individual foam cells.
• Open-cell foam has some unenclosed cells. The cells are left unlocked. The outcome is a more elastic and flexible foam.
• Closed-cell foam is made up of just closed cells. The crushed cells prevent air and moisture from entering the foam. Therefore, closed-cell foam is stiffer and more stable than open-cell foam.

More differences are, 

Density

Open-cell foam is lighter and thinner than closed-cell foam. Generally, open-cell foam weighs around half a pound per cubic foot. On the other hand, closed-cell foam weighs more than three times as open-cell foam. 

R-Value

The R-value of foam insulation influences how well it resists heat flow.

Closed-cell insulation has an R-value about twice that of open-cell foam, at 6 per inch. Some products in this category have a rating of around seven per inch. Closed-cell foam’s greater R-value improves a building’s capacity to regulate its internal temperature.

Open-cell foams can have up to 3.5 R-value per inch. Open-cell insulation has a lower R-value than closed-cell foams, which may limit its use in cold areas.

Expansion

In practice, this is one of the most notable disparities. Closed-cell foam grows to about 1′′ thick when sprayed. There are several ways to raise an inch’s r-value, which is currently 7. Because open cell foam swells to 3′′ thick, it can only be used once in most walls.

Benefits 

Closed-Cell Foam

When space is limited, closed-cell foam gives double the R-Value of open-cell foam. Its stiffness helps with structural stability, and it comes in E84 fire-rated variants. 

Open Cell Foam 

Because open cell foam expands when sprayed, it may insulate hard-to-reach areas. Open-cell foam is an excellent soundproofing material since it can completely cover stud spaces.

So, Which Is The Best?

It boils down to the home’s location, desired insulation level, and budget. Do you need any more help deciding between open and closed-cell foam? Contact us! You can get the materials of your choice and expert service at Anderson Insulation. Our team of experts is here to help you work through the insulation process and better understand what you need most! Contact us today at 781-857-1000!