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Sign in freeDetailed procedure for replacing a damaged panel section on a sectional overhead door. Covers identifying and sourcing an exact-match replacement section, securing the door and disconnecting the operator, torsion spring unwinding and cable disconnection when the bottom section is involved, hardware removal, sliding the damaged section out of the interlocking joints, inspecting adjacent sections and track, installing and seating the new section, reinstalling hardware, reconnecting cables and rewinding springs, and balancing and testing the completed door. Applies to both intermediate and bottom sections on residential and commercial sectional doors.
Warnings
This procedure must only be performed by trained, qualified door service technicians. Bottom section replacement involves torsion spring handling, which can cause serious injury or death if done improperly.
If replacing the bottom section, the lift cables must be disconnected. This requires unwinding the torsion springs first. Never disconnect cables from bottom brackets while springs are wound. The brackets are under extreme tension.
Secure the door in position with clamps before removing any section. An unsupported door can shift or fall, causing injury.
Replacement sections must be the exact manufacturer match. Mismatched sections will not interlock properly and compromise the structural integrity of the door.
Required PPE
Tools required
Step 1
Replacement sections must be the exact manufacturer match. Mismatched sections will not interlock properly and compromise the structural integrity of the door.
Before ordering anything, fully document the section that needs to be replaced. Record the door manufacturer, model number, section number (sections are numbered from the bottom up), section dimensions (width, height, and thickness), color, and insulation type. Order the exact replacement section from the manufacturer or an authorized distributor. Verify that the replacement matches the original in every respect before beginning work. An incorrect section will not interlock with the adjacent sections and will compromise the door.
Pro Tips
Checklist
Disclaimer: These videos are produced by third-party YouTube channels and are not affiliated with DoorBot. Video content may not align exactly with the procedures above, may depict techniques that differ from DASMA or manufacturer recommendations, and may show tasks that are dangerous if performed without proper training and equipment. Always follow the written procedure, your company's safety policies, and applicable industry standards. Use these videos as supplementary reference only.