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Get your free estimateClopay Cable & Drum Replacement: The Alpharetta Owner’s Guide
Clopay cable and drum replacement in Alpharetta typically runs $130 – $250 installed, depending on whether we’re replacing the pair or just one side. We carry Clopay-compatible cables and drums on the truck, so most Alpharetta jobs are done same-day in a single visit. Owners usually find out about this failure when the door gets heavy on one side, jerks during travel, or makes a grinding sound while the cable frays against the drum.
The cable is the braided steel line that runs from the bottom bracket up to the drum; the drum is the grooved spool mounted on the torsion tube that winds and unwinds that cable as the door moves. When either one fails, the door stops lifting evenly and the balance goes out. Left alone, the other side takes the extra load, and you end up replacing both anyway. Better to catch it when it’s still a cable or a drum, not a bent track and a cracked panel.
Which Clopay Models This Applies To
Clopay builds residential doors under a few long-running lines: the Classic, Gallery, Coachman, and Reserve series. The cable and drum setup differs by door weight and height, not by aesthetic style, so a 16×7 Gallery steel door shares the same drum profile as a 16×7 Classic if the weight class matches. What matters is the drum size, the cable length, and whether the spring is torsion or extension.
If you still have the original door label, it’s usually near the top section or on the end stile; it lists the model and the date code, which helps us pull the right drum. If the label is gone, we measure the drum’s outside diameter and count the cable grooves. Clopay doors from the last fifteen years mostly use drums in the 400-8 or 400-12 class, but there are enough exceptions in older Alpharetta homes that we confirm before we quote. We stock OEM-spec Clopay replacement parts and quality aftermarket equivalents that meet the same dimensions and load rating; we’ll tell you which one makes sense for your door. Brock Garage Doors Alpharetta is an independent service company, not affiliated with Clopay, but our techs work on Clopay equipment every week.
Styles & brands we work with






Signs Your Clopay Cable & Drum Replacement Is Failing
- Door hangs crooked or heavy on one side. This usually means one cable has lost tension or snapped, and the opposite spring is now doing all the work. The door may lift to about waist height and then bind.
- Visible fraying or broken strands on the cable. Steel cables don’t fail all at once; they shed individual strands first. If you see stray wire sticking out anywhere along the length, the cable is done and should be replaced before it snaps under load.
- Cable is off the drum and wrapped around the shaft. This happens when the drum has wandered or a spring broke and threw the slack. Running the door in this condition will chew up the cable and score the drum grooves.
- Grinding or scraping sound near the top of the door during travel. A worn drum with smooth or chipped grooves lets the cable slip instead of seating cleanly. The sound is the cable skating across the drum face.
- The door slams shut when lowered, or drops the last foot. That’s a sign the cable is slipping on the drum and isn’t controlling the descent. The opener can’t hold it, and the door becomes a hazard.
Replacement Cost & What’s Included
In Alpharetta, a single Clopay cable replacement runs $130 – $180 installed. Replacing both cables plus both drums runs $200 – $250 installed. Labor and parts are always quoted together, in writing, before we start, so the number you approve is the number on the invoice. If we open it up and find the drum is still serviceable, we’ll tell you and price it as cable-only; we don’t replace parts that aren’t failing just to pad the ticket.
Every cable and drum replacement at Brock Garage Doors Alpharetta carries the 365-Day Done Right Promise in writing. If the work fails within the year, we come back and fix it at no charge. That’s not a verbal assurance; it’s on the paperwork. We also run the door through a full cycle after every repair and check the spring balance while we’re there, because a cable that failed often did so because something upstream wasn’t right.
See the difference
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AfterDIY or Call Us?
The cables on a torsion-spring door are under constant high tension. When the door is closed, that tension is wound into the springs; the cables are what keep it contained. If you disconnect the wrong bracket while tension is live, that cable can whip loose and do serious damage to anything in its path, including you. Plenty of garage door injuries in this trade come from exactly this repair, and the ones who get hurt are usually smart people who underestimated the load.
What you can safely do is look: check for frayed strands, check if the cable is seated in the drum groove, check if the door is visibly crooked. Then call us. We’ll quote the repair in writing before work begins, and a tech who has done hundreds of these can have the door balanced and running clean in about an hour. Call (229) 404-6747 for a free estimate.
FAQs
Cables on a well-maintained Clopay door in the Alpharetta area typically last 7 to 10 years before the first signs of fraying. Our humidity shortens that window a bit compared to drier climates, because exposed steel takes on moisture and corrosion works at the strands. Drums last longer than cables, often 15 years or more, but they’re usually replaced as a set once the grooves wear.
Call (229) 404-6747 for an exact quote; estimates are free.
No. A frayed cable is a failed cable in progress, and there is no responsible repair for it. Patching or splicing a garage door cable is dangerous and won’t hold; the cable takes the full weight of the door on every cycle. Replacement is the only fix that leaves the door safe to operate.
Call (229) 404-6747 to get it replaced before it snaps; estimates are free.
Most Clopay cable and drum replacements in Alpharetta take 45 to 75 minutes on site once the truck is there. That includes releasing the tension, swapping both parts, re-balancing, and cycling the door several times to confirm it’s tracking straight. The tech will show you the old parts and explain what failed before he leaves.
Call (229) 404-6747 to schedule; we’ll give you a straight arrival window and a written price.
Yes. Our trucks carry Clopay-compatible cables in the standard residential lengths, both 400-8 and 400-12 drums, and the hardware to match most Classic, Gallery, Coachman, and Reserve doors. We also carry parts for LiftMaster, Chamberlain, and Genie openers if the door problem turns out to be opener-related. In most Alpharetta cases, we fix it in one trip.
Call (229) 404-6747 and tell us the door model; we’ll confirm the parts are on the truck before the tech heads your way.
Call Brock Garage Doors Alpharetta for Clopay Cable & Drum Replacement
If your Clopay door is crooked, frayed, or grinding, call us at (229) 404-6747 for a free estimate. A real person answers, day or night. We’ll give you a written price before any work starts, the tech will be background-checked and in uniform, and the repair is covered for a full year in writing. Wade Mercer and the crew serve Alpharetta and the surrounding area, and we’ve been at this long enough to know the difference between a quick fix and a door that’s about to fail again. Tell us what it’s doing wrong. We’ll figure out the rest from there.
Written by Wade Mercer, Owner, Brock Garage Doors Alpharetta at Brock Garage Doors Alpharetta, serving Alpharetta and nearby areas.