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DurhamGarage Door Specialists
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Technician on a blue ladder using a red cordless drill at a steel hinge on a white sectional garage door.

Garage Doors

Advice from the workshop

Every month we hear the same handful of worries from different households. This section answers them once, clearly, so you can read at your own pace and call when you are ready.

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The questions that come up

Will you tell me if the door should not be used?

Yes, plainly and at the door. A slack or frayed cable, a gap in a spring coil, a door hanging crooked, a bracket pulling out of the framing or an opener that fails the reversal test are the kinds of findings that put an item in the stop-use group. When that happens you see the reason yourself, the door is left resting in a safe spot with the opener unhooked, and the fix is written up and quoted so it can be booked.

What information helps when I book?

The door type and rough size, single or double; the opener brand or a photo of its label; what you have noticed, such as noise, shaking, hesitation, slamming or reversing, and whether it is worse in cold weather; whether the door has been struck by anything; and whether the springs are above the door or along the sides. None of this is required, but each detail helps the right parts and tools arrive with the technician.

My car is trapped inside. Can I lift the door by hand to get it out?

Lifting a crooked door is where most injuries around this problem happen, because the springs and cables are loaded unevenly and the door can shift suddenly. Tell the technician on the phone that a vehicle is inside; getting it out is part of the plan, and the door will be supported and levelled before it is raised. A short wait is far cheaper than a bent section or a hand caught between panels.

Why is the bottom section handled differently from the others?

The bottom section is where the lift cables attach, through the bottom brackets at each end, and those cables are under the full pull of the springs. Before the brackets come off, the springs have to be unwound or unhooked so the cables go slack. The bottom section also carries the seal retainer and astragal that meet the floor. After the new section is in, the springs are re-tensioned and the balance reset.

How do I look after the new seal?

Wipe it clean of salt and grit a few times a year, and give it a light coat of silicone spray each autumn so meltwater has nothing to bond to. Keep petroleum products and solvents away from it, since they soften vinyl. Clear ice and packed snow from the threshold before running the door in winter. Once a season, look under the closed door for daylight. That is the whole routine.

Will replacing the perimeter seal keep mice out?

It closes one of their favourite routes. Mice enter at the open corners where the header and side seals meet and along a fin that has shrunk back from the door, so a continuous, overlapped seal removes those gaps. It works alongside a sound bottom seal, a swept threshold and attention to any other openings in the garage wall, and a technician will point out any of those noticed during the visit.

Will new holes have to be cut in the track?

Rarely. The slots are already there on most tracks, and a bar that misses one is usually a sign the door or a guide has moved. Restoring the door's closed position and resetting the guide brings the bar back to the existing slot. A new slot is punched only when a lock is added to a door that never had one, or an old slot is badly damaged.

How long do garage door rollers last?

It depends on what they are made of and how often the door moves. Builder-grade plastic wheels with no bearings often show wear after only a few years. Steel and nylon rollers with seven to thirteen ball bearings are typically rated for ten to fifteen thousand cycles, roughly the life of a torsion spring, which for many households means seven to ten years. Sealed-bearing nylon rollers are rated far higher. A door used many times a day, or one living with salt and slush, shortens all of those.

Why does the door pop or click at the same spot every time?

A noise at a fixed height points at the joint passing through the curve at that moment. A cracked hinge leaf flexing open and snapping back, a pin rocking in a worn hole, or a roller stem shifting in a loose hinge all make a sharp report as the load transfers. Because it always happens at one place, the technician can go straight to that joint and usually finds the hinge or roller responsible.

Does a heavy insulated door need heavier track?

Usually the standard two-inch track handles a residential insulated door well, provided the gauge matches what the door maker specified and the brackets and hangers are properly fixed. Very heavy or oversized doors, and some carriage-style wood doors, are set up on three-inch track or on heavier-gauge two-inch. If a heavier door was hung on the light track from an earlier door, flexing and spreading follow, and the technician will say so.

What should I do while waiting for the visit?

Leave the door in the position it is in and stop using the opener. Move the car and anything else you need out of the garage by another door if you can, and clear the floor near the door so the technician has room to work. If a cable jumped because the door closed on something, leave the object where it was; it helps explain what happened.

Can I keep using the opener until the technician arrives?

The kindest thing for the door is to leave it where it is and use another entrance. An opener is designed to move a door the springs have already made light; asking it to lift a full-weight door strains the trolley and gear drive and can crease the top section. Keeping the door still and clear of people until the spring is replaced protects the rest of the system from extra repairs.

What is the difference between extension springs and torsion springs?

They balance the door in different places. Extension springs are the two long coils that run beside the horizontal tracks and stretch as the door closes; they work through pulleys and cables. A torsion spring is wound on a shaft above the door opening and turns drums that wind the cables. The parts, the way tension is set and the service itself are different, so it helps to say which you have when you call.

Is this something I can do myself?

The hand test, yes, and it is a good habit. The adjustment itself is a job for a trained technician, because the springs, cables, drums and bottom brackets are under high tension whenever the door is closed, and the industry's own guidance reserves any change to them for someone with the right bars, clamps and method. Leaving that part to the visit keeps the whole thing uneventful.

Why will the door close only while I hold the wall button?

That is a built-in behaviour, not a new fault. When the sensor circuit reports a problem, most openers refuse to close from a remote but allow a constant-pressure close from the wall control, because someone standing there can see the doorway. It is a strong signal that the photo eyes or their wiring need attention, and once the sensor issue is corrected the door closes normally from every control again.

How long does a chain-drive repair take?

A tension and limit adjustment with the reversal tests is generally a short visit. Replacing a gear and sprocket assembly or fitting a new chain, phasing it, tensioning and re-setting the limits takes longer, usually a good part of a morning or afternoon. If the balance check shows spring or roller work is needed first, or a part for an older model has to be ordered, the technician will say so and plan a second visit.

Does the trolley need replacing when the belt does?

Not usually. The trolley is checked while the belt is off: its halves should part with the release cord and lock again, the housing should be free of cracks and it should ride the rail without play. A trolley that passes those checks stays and simply receives the new belt and a fresh clip. One that sticks or rattles is replaced in the same visit.

How many remotes and keypads can be added?

Capacity depends on the model: current operators hold anywhere from about eight to forty remote codes, so most households can pair every driver, a keypad, in-car buttons and a phone with room to spare. Remotes are added by holding the learn button on the head unit and pressing the remote; the console guide shows the steps and the technician leaves them written down. If a remote is lost later, clearing the memory and re-teaching the others takes only a few minutes.

Could the wiring be the problem rather than the sensors?

Frequently. The sensors are fed by a thin two-conductor wire from the head unit that crosses the ceiling and drops down both sides of the door, and it is pierced by staples, cut by shelving screws, chewed by mice or pulled from its terminals more often than a sensor fails. Both sensor lights dark, or an opener code for an open or reversed circuit, points to the wire. The technician tests the run with a meter and repairs or replaces the damaged section.

We just moved in. Should the opener's memory be cleared?

Yes, it is sensible. The previous owners may have handed over two remotes while a third sits in a relative's car, and the keypad code may be known to their cleaner. Clearing the memory forgets every stored remote and keypad code, then your own remotes, a new keypad code and your vehicle buttons are programmed back; a connected app or account from the previous owner is removed separately, since clearing the memory alone does not always take it with it.

Will I get an alert if the door is left open?

That is one of the first settings made. You choose how long the door can stay open before you hear about it, often ten or fifteen minutes, and the notification goes to every phone on the account or only to some. In a climate with real winters this single alert saves a good deal of heat, and occasionally a pipe in the wall shared with the house.

I lost the key to the outside release. What now?

The cylinder can be replaced with a new one and two fresh keys, which is the usual answer since a lost key may be in someone else's hands. On some units the cylinder can be rekeyed instead. Either way the cable and lever are checked while the lock is out, and the technician suggests keeping the spare key outside the garage, with a neighbour or in a lockbox, rather than inside behind the door it opens.

Do I need a new opener at the same time?

Not automatically. The decision depends on the existing operator's condition, compatibility, attachment and the customer's access goals. Door replacement and opener replacement are separate scopes that can be coordinated. Evaluating the mechanical door first keeps the operator decision grounded in how the new assembly moves and what equipment information supports.

What safety checks are done after installation?

The installer first checks manual balance, cable tracking, roller travel, track supports, fasteners and the fully open and closed positions. If an operator is connected, complete powered cycles follow. Photo-eye response, contact reversal according to the operator instructions, wall controls and emergency release are demonstrated. The customer also receives guidance on safe gripping points and keeping clear of section joints.

Is a building permit needed for replacement?

A like-for-like door change and a project involving structural alteration are different situations. Enlarging an opening, combining bays, replacing framing, or completing work already covered by a permit can introduce municipal review. Ask the local building department about the specific scope, and keep its direction with the door selection and installation documents.

Can I get the traditional look and still use an automatic opener?

Yes. The traditional effect is created by section design, overlays, windows and decorative accents; the working door can still travel overhead under automatic control. The opener is matched or reviewed for the door's dimensions, finished weight and track geometry. Its arm attaches to a reinforced point, and travel, photo eyes and reversal are set after the door is balanced.

Is the glazing always made from glass?

No. Depending on the selected door system, infill choices may include tempered or laminated glass, acrylic, polycarbonate and solid aluminium panels. Each has its own weight, appearance, privacy, impact and cleaning characteristics. Availability also changes with door size, insulation and frame construction, so the material is confirmed as part of the complete ordered configuration.

When in the construction schedule should the garage door be installed?

Installation is usually planned after the opening, roof and attachment framing are complete and the finished dimensions can be confirmed. The floor elevation, exterior finish details and overhead obstructions should also be established. The exact point depends on site access and protection: sections need a clean staging area, while later masonry, painting or floor work should be sequenced so it does not damage the installed system.

Why is the door lifting higher on one side?

Uneven travel commonly points to a lift-cable or drum issue, though a displaced roller, bent track or damaged bottom fixture can create a similar angle. The door is supported first, then both lifting sides are compared for cable condition, drum seating and hardware position. Correcting the cause and restoring equal tension brings the bottom edge back to level movement.

What information helps before the visit?

Useful details include the opening size, curtain material, manual or powered operation, model labels, current door position, recent impact or weather event and the exact point where travel changes. Photos of the full opening, bottom bar, controls and labels can clarify the system. Mention a fire-protection label at the outset so that scope is recognised.

Why are new cable drums usually part of the project?

A high-lift door changes how cable must wind as the panels move vertically and then turn. High-lift drums use a contoured groove profile to manage that changing leverage and help balance the door through its travel. Drum selection is coordinated with door weight, lift dimension, cable length, shaft and spring design rather than chosen as an isolated hardware swap.

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