Spray Foam Insulation Risks: Homeowners Warned About Moisture Buildup
Homeowners who consider investing in spray foam insulation for their homes should be aware of some potential pitfalls, according to experts on the Home Depot Home Improvement Show. On August 29, 2026, hosts John Gordon and David Dovell discussed the benefits and drawbacks of spray foaming an attic.
Spray foam insulation can provide significant energy savings by reducing heat transfer through walls and ceilings, but improper installation can lead to serious problems. John and Dave explained that failing to account for a home's HVAC system when installing spray foam insulation can create issues with moisture buildup and condensation.
The hosts noted that oversized air conditioning systems can cause short cycling, which leads to cooling the home without running long enough to properly remove humidity. When this excess moisture becomes trapped in a spray-foamed attic, it can result in costly roof damage that may remain hidden for years.
Homeowners should be aware of these potential problems and take steps to prevent them when considering spray foam insulation for their homes.