Closed and Open Cell Spray Foam

With all the differing kinds of spray foam available as a choice, we wanted to discuss what the 2 main forms are. We will be going over the distinctions involving open-cell foam and closed-cell foam spray insulation.

Open-Cell Spray Foam Insulation

A lot like how it is titled, open-cell foam contains very small bubbles which are interconnected. The bubbles keep air, delivering the insulation value. The R-Value is typically between R-3.5 and R-4 per in. It’s R-Value is not as large as closed-cell, which we will discover next, and it is far more porous also, because of the air bubbles, and will absorb moisture a lot like a sponge.

Both closed-cell and open-cell foam will expand inside spaces and crevices as soon as it is applied. Open-cell foam has a softer touch as a consequence of the air bubbles. Virtually any insulation will lose R-value if it becomes wet, so utilizing open-cell spray foam in moist conditions including in basements and crawl spaces is absolutely not an effective option. Open-cell foam is normally less expensive to install that closed-cell foam.

Closed-Cell Spray Foam Insulation

Perhaps the top illustration of closed-cell foam that almost all house owners are familiar with is the brand name Great Stuff, that is available in a can. Nevertheless, the form of closed-cell spray foam that a pro insulation company will make use of is known as a two-component type. Two chemical compounds are mixed together within the application nozzle, producing the increasing foam reaction. Great Stuff is actually a “single-component” form.

Closed-cell is even more costly to apply for the reason that its more dense, yet for residential insulation tasks it truly is the perfect option since it has a higher R-Value (between R-6 and R-7.1 per in.). It also creates an excellent moisture screen that open-cell foam could not generate. Because it blocks dampness, it additionally creates a superb air seal and vapor barrier and a significantly tougher finish compared to the spongy open-cell type. One more benefit from it is it will be able to improve the structural rigidity of the house since it is so dense in nature.

The majority of insulation contractors think that closed cell foam certainly is the best insulation solution on the market currently. r-valueAlthough it does cost more, its cost usually can pay for itself in 4 to 6 years. It is as much as 40 % more energy-efficient than conventional insulation, and is going to go a good way at raising the value of ones property!

If perhaps closed-cell foam is more effective, when should property owners think about applying open-cell spray foam? The top purposes for it will be for dry roof and wall cavities. It can still have good insulation properties and additionally will help with sound proofing too. At a thickness of 5 ¼ inches, open cell spray foam absorbs 95 % of heat infiltrating a roof.

The graphic to the right shows the insulation R-Value comparison between spray foam, fiberglass, and fiber board sheating. With the findings previously mentioned on the two R-Values of open and closed-cell foam offered, it is clear that either one is a definite advantage over traditional insulation.

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