I am so pleased with my Retrofoam installation! The company showed up when scheduled, did my installation, and left no mess, all while charging me a very reasonable price. We can already tell a difference in the temperature in our very old home. The HVAC unit is getting some relief. I look forward to the reduced energy bills. Thank you, Retrofoam!
SB
Scott Brockamp
Sep 16, 2025
5.0
The team did a great job. They were so courteous and cleaned up every place they went. I would highly recommend RetroFoam for any and all of your insulation needs. Our project was somewhat unique, and Eddie made sure that went through every option to provide the best solution for our situation. Very thorough and professional all the way.
JD
Janie Damewood
Aug 17, 2025
5.0
Recently, RetroFoam came out to insulate our garage. Our home was built in 2015, but the builder hadn't insulated above or in the walls of the garage. We received estimates from a few companies, but we were especially impressed with Eddie, the representative from RetroFoam - his attitude and professionalism stood out right away.
On installation day, Nate, Gunner, and Robert arrived and did a fantastic job. They prepped the area thoroughly, completed the work efficiently, and left everything spotless. Their professionalism and work ethic were excellent from start to finish. The entire experience was smooth, and we couldn't be happier with the results.
Highly recommend RetroFoam and this TEAM!
RM
Robert McIntosh
Aug 6, 2025
5.0
Kevin and the crew were great!
SM
Slade M
Aug 6, 2025
5.0
Eddie treated me very well and price was on the lower side of all the quotes I shopped. He came out and looked at the job gave me a quote and the guys were not to far behind starting the work. 50x60 steel building 2” Closed Cell Foam they knocked it out in 2 days. Finished product is amazing.
Frequently Asked Questions About RetroFoam of East Tennessee
How does the RetroFoam-licensed installer know when a wall cavity is completely full of foam?
By timing the cavity fill, methodically placing the insertion holes, and providing back-pressure on the insertion hole, we are able to ensure a cavity is completely full. We are as concerned with overfilling.
RetroFoam contains water when it is first installed. Where does it go? Will it damage the walls?
Initial water content of the foam is approximately 4% by volume, too low to affect a building's structure. The partially open-cell nature of the foam means the insulation dries out quickly (in approximately two to three weeks) and once dry, RetroFoam resists re-absorption of water. In most cases, the foam dries out before mold can grow. Additionally, prior to insulation, a technician will assess your home for existing moisture issues that could extend dry time.
Will RetroFoam cause dampness?
No. When RetroFoam is exposed to water it is hydrophobic, meaning it sheds water rather than holds it. Even when immersed in water, RetroFoam absorbs only a small amount of water which quickly evaporates once it is removed from water. As with most insulation materials, RetroFoam will become water-logged when exposed to water over a long period of time.
Is it safe to fill the cavity of a brick veneer home (this is called the Wythe cavity)? I thought there needed to be a ventilation space between the brick and wood framework?
This is partially correct. However, the primary purpose of this gap is to keep moisture traveling through the brick, which is porous, and touching the wood and sheathing. If the wood is in contact with brick, it will take up moisture, which causes the wood to rot. RetroFoam is breathable but also repels water. The foam fills the whole cavity space providing a suitable thermal barrier, without transferring moisture to the wood.
Will installation disrupt my home?
Installation takes approximately one to two days, so there is minimal disruption to your home. We ask that pictures be removed from the walls.
Will I need to be home?
It’s preferable but not necessary. We do ask that our crew members have access to the home to monitor for problems during the foaming process, as well as to check outlets once the drilling is complete.
Will RetroFoam cause a fire hazard in the wall?
No. RetroFoam has a Class I fire rating, which means it is non-combustible. Even in intense heat, RetroFoam will not burn or melt. However, it will char, lose weight, and disintegrate.
Does RetroFoam corrode the plastic coating on the electrical wires inside the walls?
No. Unlike some plastics, RetroFoam will not react with plastic-coated cabling or wiring.
Will RetroFoam shrink and deteriorate with age, thereby losing its insulation properties?
To a small degree (maybe as much as 1-3%), some initial shrinkage is normal, but tests have shown that RetroFoam maintains its physical and insulation properties. Often the void space from shrinkage is less than what can be achieved when installing fiberglass bat insulation.
What does it feel and look like?
When first installed, RetroFoam feels similar to a shaving cream. It needs a semi-fluid consistency in order to seal the entire wall cavity and flow evenly around various barriers. It begins drying almost immediately, although it takes between two to four weeks to cure. Once dry, it becomes firm but remains malleable at all times and can be gently removed and reinstalled.