What It Is

Closed cell spray foam is a type of insulation made of dense, gas-filled bubbles that harden into a rigid structure as it cures.

This rigidity adds strength to your building’s framework—making closed cell spray foam insulation ideal for both durability and energy efficiency.

With a high R-value of up to R-7 per inch, it also reduces sound by up to 50 decibels. When applied at depths of 1.5” or more, closed cell spray foam becomes a class II vapor barrier, protecting your home from moisture and energy loss.

Closed-cell spray foam insulation typically has a density of 1.7 to 2.3 lbs per cubic foot, offering long-lasting performance without sagging or settling.

Common Uses

Closed cell spray foam insulation is versatile and ideal for a wide range of projects—from residential homes and basements to post-frame and commercial buildings.

While closed cell spray foam may have a higher upfront cost compared to other materials, it’s a long-term investment that pays for itself.

It never needs to be replaced, won’t degrade over time, and provides excellent soundproofing and thermal protection for years to come.

applying spray foam insulation to open walls

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As fully-certified insulation professionals, we have the experience to tackle a wide range of projects.

Kevin Steffensmeier

The crew at AFI was outstanding! Work was completed in a professional and timely manner. Highly recommended!

Kevin Steffensmeier , Urbandale, IA
Teri Lutz-Oberender

This company is the best. Our home posed many challenges as it is 148 years old with additions of unknown ages. Mike K. and his team faced each challenge with grace and got the job done to perfection. Even with a 70 lb puppy, Milly bringing him toys all day. I highly recommend them!

Teri Lutz-Oberender , Des Moines, IA
Jeremy Hewitt

The guys did a great job this morning with an extraction! Looking forward to calling them when we need to spray foam!

Jeremy Hewitt , Des Moines, IA
Jim Piper

The crew did a GREAT JOB.

Jim Piper , Iowa
Bruce Sullivan

Mike and his helper did a great job insulating my garage. Very Professional and did a good job cleaning up also. Highly recommend.

Bruce Sullivan , Pleasant Hill, IA
Jenni Gardner

We were very impressed with the professionalism and speed at which we got service from AFI. Darren came out on Wednesday to give us a quote and had Mike and his team out on Friday to put in the insulation. They were courteous and did an excellent job. Would highly recommend.

Jenni Gardner , Iowa
Charlotte Prather

They were very knowledgeable and helpful. Mike, Kane, Dustin and Zac worked together to do a good job. They told me what they were going to do and did it in a timely manner. They cleaned up the area after they were done and didn’t leave a mess. We would recommend AFI to everyone wanting a good job done with there insulating projects. Thank you guys. We now will stay warm this winter.

Charlotte Prather , Monroe, IA
Kane Fairman

I recommend AFI for any insulation needs. Very professional, responsive, knowledgeable and top quality workmanship.

Kane Fairman , Ankeny, IA
Bridget Larson

Great service, excellent work! Duston installed our spray insulation and explained everything, did efficient work and cleaned up the space promptly afterwards! Would def use them again in the future!

Bridget Larson , Iowa City, IA