Home insulation serves many purposes, from reducing noise to regulating indoor temperatures. Spray foam insulation is a liquid material that expands when it hits a surface, creating an air-tight seal. It can be worrisome when the surface gets wet due to a roofing crack or plumbing leak. Review this guide to learn about your options in this situation.

What Happens When Spray Foam Insulation Gets Wet?

Instead of deteriorating when exposed to water like traditional fiberglass insulation, spray foam will dry when wet. However, excessive moisture could affect the shape of open-cell or component spray insulation once it’s on the wall. 

Although it will still dry over time, the foam may not have the same air-tight seal. Polyurethane spray foam won’t change its shape as it dries because it’s a water-resistant material. 

A common concern with wet insulation is that the trapped water can lead to mold growth. Another concern is that the moisture could penetrate the insulation and cause water damage to the wood surface beneath it. However, both assumptions aren't entirely accurate. Spray foam insulation is regularly used in areas where moisture can be present, such as attic spaces beneath roof decks. The foam seals cracks and crevices as it expands and effectively protects the wood by repelling water.

How Can You Dry the Insulation?

If spray foam insulation gets wet, the moisture will remain on the material’s surface. Thanks to the material's water resistance, moisture won’t penetrate the insulation. 

Over a short time, the water will evaporate. You can speed up the drying process by using a towel to blot the water from the foam’s surface. It would also help to position a fan in front of the wet spot to blow air on the damp area. Although it's unlikely that the moisture reached the wood beneath the insulation, it’s best to contact a roofing contractor specializing in insulation to examine the site and check for signs of mold or wood rot. 

For quality spray foam insulation, turn to Advanced Seal LLC. Serving Lafayette, IN, and Wichita, KS, these experienced technicians and roofers offer several services to make residential and commercial properties more energy-efficient, such as attic insulation and roof coatings. To schedule a consultation with a knowledgeable team member, call (833) 436-2648 or visit them online.