Single-car, double-car, insulated, wood—every door weight explained, and why it matters for the spring you need. Call 423-583-9355 anytime.
Typical residential door weights - **Single 9×7 non-insulated steel:** 90–120 lbs - **Single 9×7 insulated steel:** 130–170 lbs - **Double 16×7 non-insulated steel:** 150–200 lbs - **Double 16×7 insulated steel:** 200–280 lbs - **Double carriage with composite overlay:** 280–350 lbs - **Double real-wood carriage:** 400–600+ lbs
Why weight is everything The spring system has to counterbalance the door's weight within ~5 lbs at every position. Under-sized springs strain the opener and snap early; over-sized springs make the door dangerous when the opener is disconnected.
How we size your springs Real-weight measurement with a scale, plus drum size, drum cable wrap, and door height—then IPPT calculation. Builder-grade springs frequently undersized your door by 10–20%.
Related - [Torsion vs extension springs](/torsion-vs-extension-springs-chattanooga) - [Insulated vs non-insulated doors](/insulated-vs-non-insulated-garage-doors-chattanooga)
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