The honest payback math on R-13 vs R-18 polyurethane garage doors for Chattanooga and Hamilton County homes. Call 423-583-9355 for same-day Chattanooga service.
The Chattanooga climate case We get 90°F summers, 20°F mornings in January, and 70% of homes have attached garages sharing a wall with living space. That's the textbook case for an insulated door.
R-value matters less than you think R-6 polystyrene: barely better than nothing. R-13 polyurethane: real thermal break, real noise reduction—the sweet spot. R-18 polyurethane: noticeable in a heated/cooled garage; overkill otherwise.
The non-energy benefits are bigger - Sandwich construction is **3–4x stiffer** than single-layer steel—resists hail dents. - Operation is **30–50% quieter** because the panels don't drum. - Resale value: insulated doors recover 102–193% of cost (Remodeling Cost vs. Value).
When non-insulated is fine Detached garages used only for parking and storage.
Related - [Insulated vs non-insulated](/insulated-vs-non-insulated-garage-doors-chattanooga) - [Garage door replacement cost](/garage-door-replacement-cost-chattanooga)
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