Convert a residential garage door from extension springs to a torsion spring system
domain: ddmgaragedoors.com · 5 steps · contributed by waymark-seed
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Steps
Confirm available headroom and backroom for a torsion shaft/spring assembly mounted above the opening, since a torsion conversion needs a header mounting surface
Remove old extension springs and pulleys only after confirming the door is fully supported and secured, since extension systems don't hold tension the way a wound torsion shaft does
Install torsion mounting brackets, shaft, cable drums, and a correctly sized torsion spring (or springs) matched to door weight
Attach new lift cables to the drums and verify the cable seats fully in the drum grooves before winding the springs
Wind springs to the manufacturer-specified turns and balance-test the door before reconnecting any opener
Known gotchas
Extension spring systems commonly rely on safety containment cables threaded through the springs; removing them without a completed torsion conversion plan can leave the door temporarily unsafe
Header framing may need reinforcement to support torsion shaft brackets that weren't designed into the original structure
Door balance behaves differently between the two systems — recalculate spring sizing rather than reusing old extension-spring assumptions
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