We do more repair than replacement, so take this for what it is worth — but the framework below is the one we actually use when someone asks, and it is not complicated.
Repair wins when the door is sound and one thing failed
This is the large majority of cases. A broken spring, a snapped cable, a worn set of rollers, a stripped opener gear, a misaligned photo eye — on a structurally sound door, all of these are repairs and none of them is a reason to buy a new door.
The test for "structurally sound" is the panels. If the sections are straight, not rusted through, not delaminating and not cracked, the door has life in it. Springs, cables, rollers and openers are consumables. You will replace all of them several times within the life of the door itself, and that is normal.
Anyone who responds to a broken spring on a fifteen-year-old door in good condition by quoting a new door is selling doors, not diagnosing.
Replacement wins when three things line up
Not one of them — all three:
- The door is over twenty years old.
- More than one system needs work at once — say, springs and cables and a failing opener.
- The panels themselves are compromised — rust through the bottom section, rot on a wood door, creased sections from impact.
When all three are true, repairing means putting new hardware onto a shell that is going to need replacing soon anyway, and paying the labour twice.
The case that is not a calculation
If your opener has no photo-eye safety sensors, it was manufactured before 1993 and it should be replaced regardless of how well it currently works. Openers of that vintage close on whatever is beneath them. That is a safety decision, not an economic one.
The related line is 1996: openers made before then use a fixed security code that can be captured and replayed with cheap equipment. If yours predates that, replacement is a security upgrade as well.
The fourth reason, which is legitimate
Sometimes the door works fine and you simply want the front of the house to look different. That is a real reason and it does not need a mechanical justification.
It is also worth knowing that garage door replacement consistently ranks at or near the top of exterior remodelling projects for cost recouped at resale, and the reason is geometric rather than mysterious: on most houses in this area the garage door is thirty to forty percent of what you see from the street. Nothing else you can change for comparable money alters the front of the house that much.
Some specific situations
Rust through the bottom section only. Common here, thanks to road salt. If the door is otherwise sound and the model is still made, single-section replacement is usually the right call. But fix the cause too — check the bottom seal and whether water is pooling in the opening, or the new section starts the same clock.
A dented section after backing into it. Depends entirely on whether the panel can still be matched. Manufacturers change profiles, embossing and colours regularly, and lines get discontinued. We check the model label inside the door before quoting. If no exact match exists, a near match reads as a patch from the curb.
An uninsulated door on an attached garage with a room above. This one favours replacement more than the mechanical condition suggests, because the improvement you get is one you feel every day in the room upstairs, not just a repair you stop thinking about.
Two or more sections damaged. Once you are replacing multiple panels, the combined cost approaches a new door and you would be fitting new sections to old hinges, old rollers and a spring near the end of its cycle life.
A door from the 1970s that still works. Around here, that describes a great many houses — the 1970s was the largest construction decade across most of DuPage County. If the panels are genuinely sound, keep repairing it. But understand that the springs, cables, rollers and opener are all long past their design life, and budgeting for them together is more sensible than replacing them one emergency at a time.
How long things last
- Door (steel, well maintained) — 15 to 30 years.
- Torsion springs — around 10,000 cycles, so roughly 5 to 9 years for most households.
- Cables — 8 to 15 years, less where road salt reaches them.
- Rollers — 5 to 7 years for builder-grade steel; well over a decade for good sealed nylon.
- Opener — 10 to 15 years, occasionally longer.
The pattern worth noticing: everything except the door itself is a wear item. A thirty-year-old door that has been maintained is not unusual. A thirty-year-old spring does not exist.
What we will tell you
We would rather repair your door and be the person you call next time something goes wrong. That is genuinely better business than a single larger invoice.
Where it is a real question, we will give you both numbers — what the repair costs, what a replacement costs — and the reasoning, and let you make the decision. Where the answer is clear in either direction, we will say so plainly.
Not sure which side of the line your door falls on? Describe it to us. We can usually tell you over the phone, and we cover Westmont, Downers Grove, Hinsdale, Darien and eleven other towns across DuPage County.