How Long Does Spray Foam Insulation Last?
Spray foam is one of the longest-lasting insulation materials — often the lifetime of the home.
Expected lifespan
Properly installed open- and closed-cell foam can last 80+ years because it doesn’t sag, settle, or degrade like fiberglass. It holds its shape and keeps performing.
What shortens its life
- Poor installation (wrong mix ratio or thickness)
- Prolonged UV exposure (foam should be covered, not left in sunlight)
- Water intrusion from an unaddressed roof or plumbing leak
Maintenance
Spray foam is essentially maintenance-free. Just fix leaks promptly so moisture doesn’t get trapped behind it.