Clopay Cable & Drum Replacement Nationwide

Clopay Cable & Drum Replacement: The Longmont Owner’s Guide

Clopay cable and drum replacement in Longmont typically runs $130 to $250 per side, parts and labor included. We stock Clopay-compatible cable assemblies and drums on our trucks, so most Longmont service calls the same day we hear from you. The usual first sign is a door that drops crooked, makes a snapping sound mid-cycle, or refuses to lift one side while the other side grinds upward.

Call (970) 528-5851

The cable is the braided steel line that runs from a drum near the top corner of the door down to a bracket at the bottom corner. The drum is the grooved spool it wraps around. When either one fails, the door loses tension on that side. In Longmont’s freeze-thaw cycle, we replace these on doors that are only five or six years old, because moisture works into the cable strands and the cold turns small nicks into full splits. Marcus Deller has seen this exact failure pattern across Longmont since 2015, and the same fix applies every time: name the part, quote the range, then do the work.

Which Clopay Models This Applies To

Clopay’s residential line is broad, but the cable and drum system works on the same principle across almost all of it: the Classic, Gallery, Coachman, Bridgeport, and Reserve series all use torsion spring lift systems with two cables and two drums. The important distinction is door weight and width. An 8-foot by 7-foot Clopay Classic uses a standard 3-inch drum and a 1/8-inch cable with a 7×19 strand pattern. A 16-foot by 8-foot Coachman or Reserve door needs a taller, larger-diameter drum to manage the additional cable travel.

OEM Clopay parts are not the only legitimate option. Quality aftermarket cables and drums built to the same wire diameter, drum taper, and groove spacing work reliably, and that is what most Longmont homeowners choose when they want the repair done at a fair price. The compatibility gotcha: Clopay has used both 3-inch and 4-inch drums depending on the model year and door height. Measuring the old drum before ordering a replacement is the only way to be sure you are not swapping in a part that changes the cable geometry. Servo Garage Doors Longmont is an independent service provider, not affiliated with Clopay, but we work on these doors every week and stock the common drum sizes and cable lengths for the models we see most.

Signs Your Clopay Cable & Drum Replacement Is Failing

• Door hangs crooked or one side sits lower when closed. A stretched or snapped cable means one side has lost tension. The door may still move, but it is dragging itself through the track at an angle.
• Visible cable slack or a loose cable wrapped around the drum. If a cable falls off a worn drum groove or stretches past its elastic limit, it will visibly sag. You should not be able to pinch the cable and feel play.
• Rust bloom on the cable strands or a frayed section near the bottom bracket. Longmont’s winter road treatment and spring meltwater accelerate this. A frayed cable is a countdown, not a cosmetic issue.
• Loud snap followed by the door slamming or dropping suddenly. This is the cable letting go under load. The noise is unmistakable, and the door becomes dangerous to operate.
• Door opens unevenly or binds on one track. A grooved-out drum or worn cable wrap changes the effective lifting force on one side. The opener is working harder, and the door is wearing its rollers and hinges faster as a result.

Before

After

Replacement Cost & What’s Included

In Longmont, Clopay cable and drum replacement runs $130 to $250 per side when installed by a professional. The range is driven by how many components have failed. A clean cable break on one side with an undamaged drum lands at the lower end of that range. If the cable wrapped and chewed up the drum, or the second side shows measurable wear, you are replacing both cables and at least one drum.

Every job includes the same thing: a written, itemized price with the part numbers listed before any work starts. That is Clause 1 of The Haven Standard, the written process we have operated under since 2015. The technician photographs the failed cable and drum before quoting, showing you what failed and what we are replacing. That is Clause 4, the same reason we document every step: evidence beats judgment. The price quoted is the price you pay. Nothing changes after the work begins unless you approve a written change order first. Every replacement carries our 365-Day Done Right Promise.

DIY or Call Us?

We are not going to tell you never to touch your garage door. But cables and drums are a high-tension system, and the risk is not abstract. An untensioned torsion spring can release thousands of pound-inches of stored force. The cables are what that force travels through. If you replace a cable without properly releasing the spring tension, the drum can spin violently. That is how fingers become part numbers.

You can safely check three things from the ground: is the cable visibly frayed or rust-pocked, does it sit loosely, and does the door hang level with the opener disengaged. If you see any of those, call (970) 528-5851. We will send a Longmont-based technician with the correct drum and cable on the truck, and you will get a flat written price before we loosen a single bolt. The repair itself typically takes 45 to 90 minutes for a single side.

FAQs