7 FAQs About Closed Cell Insulation

Considering using closed cell spray foam insulation in your next project? Read these common questions to learn more before you begin.

1. What is Closed Cell Insulation?

Closed cell is a type of spray foam insulation that is denser and more compact in structure than open cell insulation. When the insulation is applied, gas from the blowing agent is trapped in bubbles that form during the curing stage, creating the “closed cell” structure. This helps the insulation to resist liquid and retard vapor.

2. How much does Closed Cell Insulation cost?

Material costs vary depending on geographic location. However, materials are sold as a “set”, generally by weight, where the standard dual liquids are packed individually in 55 gallon drums, for a total of 1000 lbs. when combined as a set. To determine a specific price for your project, you should contact a representative, who can assist you in calculating how much material you will need and which type is the best for your needs.

3. Is Closed Cell Insulation better than Open Cell Insulation?

Not necessarily. It truly depends on your project, and where the spray foam will be applied. Open cell has a different structural makeup, and therefore has different uses and benefits than closed cell. You should select the insulation that provides the best results for your specific needs.

4. What equipment do I need to install Closed Cell Insulation?

You will need specific application equipment, which includes pumps, proportioners, and a spray gun.

5. How far in advance do I need to install Closed Cell Insulation before I close off the wall?

It depends on the ventilation of the room. A well-ventilated area only requires a few minutes, while a limited-ventilated room may need up to 24 hours before the wall can be closed.

6. Is Closed Cell Insulation toxic?

The chemistry behind polyurethane products can be complex, but in spray foam insulation it comes down to two different types of diisocyanates: TDI, which is not used in insulation, and PMDI, which is. When fully cured, closed cell insulation is non-toxic. However, while applying the insulation, careful steps must be taken to use proper protective gear which prevents contact and inhalation of chemicals. OSHA has very specific guidelines on how PPE should be used.

7. What types of projects require Closed Cell Insulation?

Closed cell insulation works best in both interior and exterior projects where you need to increase structural strength and resist moisture. Examples include: Roofing, residential and commercial insulation in cold climates, Below Grade applications; crawl spaces and basement walls.

Read more about the differences between closed cell and open cell spray foam.

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SprayWorks Equipment Group is a business development support and equipment supply company at the center of polyurethanes and the polyurea industry. SprayWorks' team is certified to help businesses like yours and its members have over 100 years of combined spray foam, polyurea, and construction experience.

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