Garage Door Insulation: R-Values Explained and What You Actually Need

R-6 is the minimum for attached garages. R-12 to R-18 is recommended in climates with temperature extremes. Here's what insulation actually does — and what to buy.

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6 min read•Updated 2024-09-05•By ServiceFind Local Service Standards Team

Proper maintenance and timely diagnosis of residential overhead doors prevents emergency lockout situations and mitigates the severe mechanical injury risks associated with high-tension springs and lifting cables.

Core Safety Principles

Always disconnect the electric opener before testing manual balance. When a door is disconnected from the opener, it should smoothly lift by hand and remain stationary when released at waist height (3 to 4 feet off the ground). If the door falls rapidly or shoots upward, the counterbalance system requires immediate professional calibration.