Empire Foam Solutions has a suite of “conventional” Polyurethane Spray and Injection foams in a wide range from 0.5 pcf Open Cell to 3.5 pcf High Density Closed Cell, for all sorts of insulation, pole setting, concrete lifting, etc… type applications. Contact us with your needs and we’ll see if there’s an on-the-shelf solution for you.

Frequently Asked Questions about Polyurethane Spray Foam and Injection Foam

With over 15 years crafting custom polyurethane foam solutions there has been a handful of repeated questions. Our experts answer:

What is The Difference Between Open and Closed Cell Spray Insulation?

Open cell foam has pockets of air in each cell which creates a softer material that is flexible. Though it remains water resistant, the pockets allow for water to eventually seep in.

Closed cell foam doesn’t allow any water in due to densely packed cells with no room for air. Closed cell foam is more rigid than open cell and works great in spaces that require structural integrity.

Some other differences:

  • Open cell foam will expand 4x more than closed cell
  • Closed cell foam has a higher R value of around 7 vs 4
  • Closed cell foam is 3×4 times heavier
  • Closed cell cost more for the same volume of material

How Long Does Polyurethane Spray Foam Last?

Though polyurethane is generally a very long lasting foam, there are a few factors when it comes to the practical length of time it will serve you. First, is it open cell foam or closed cell foam? Open cell polyurethane does not stand the test of time as well as the extra insulated closed cell variant. This is due to it’s ability to retain form.

What the exact difference between the two will be will range and is not an exact science but rather a general rule. Closed cell lasts longer on average.

No matter which you choose, both will last a lifetime with a 90 year rating on average.

Is Polyurethane Foam Good for Insulation?

Yes polyurethane foam is one of the warmest insulators used in homebuilding with an R value of 5-8.

Is Polyurethane Foam Grow Mold?

Though polyurethane foam can grow mold, it is very mold resistant. Mildew and mold only present themselves in cases of extreme or prolonged water damage.

Is Polyurethane Spray Foam Waterproof?

Yes and no. Polyurethane spray foam can be highly water resistant but due to the nature of both open and closed cell foams, it’s ability to withstand water will very. Open cell foam has tiny air pockets that allow water among other materials to enter the foam. Closed cell on the other hand forms a barrier against water.

In both cases, extended and extensive exposure to water could breed water damage with open cell foam succumbing to swelling much sooner than closed cell foam.

Does Spray Foam Work on Concrete?

Yes, polyurethane spray foam is great for self leveling concrete. Applying beneath the concrete it fills any gaps and forms a supportive base that lifts sunken concrete.

What is 2-Part Spray Foam?

Polyurethane spray foam is made by the reaction of two liquids, which are combined during application. The first part of the mixture is normally polymeric methylene diphenyl diisocyanate (pMDI) and methylene diphenyl diisocyanate (MDI). This mixes with part two, a combination of blowing agents and catalysts which control the creation of cells and time of expansion.

What is the Difference Between Injection Foam and Spray Foam?

Spray foam expands between materials to create insulation while injection foam insulates the material it covers, and does not expand.

Injection foam is primarily used for insulation on exterior surfaces while spray foam is used as an internal layer between interior and exterior materials.

What is the R value of Injection Foam Insulation?

Injection foam falls slightly below polyurethane spray foam in terms of insulation though it has a warm R value of 4-5.

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