Definition
Rigid foam board — the same family of material as a foam cooler — cut to fit inside garage door sections. It delivers a middle-tier R-value, usually around R-6 to R-9, at a friendlier price than injected polyurethane. Because the panels are placed rather than bonded, polystyrene adds less stiffness to the door. For a detached garage used mostly for parking, it is often the sensible value pick; for an attached garage in our climate, polyurethane usually earns its premium.
Why this term matters for homeowners
In the Four-State Area, garage door terms usually connect to insulation R-value, steel gauge, wind load, and whether repair or replacement is the smarter long-term spend.
- Use this term to ask better follow-up questions during estimates.
- Look for this language in Learn and Evaluate guides to connect definition to decisions.
- Confirm how this applies to your specific door size, age, and daily use.
Related pages
Category: Garage Doors