Not every window problem is a replacement. Several of the most common ones are inexpensive fixes, and one of the most alarming-looking is usually the one that isn’t worth repairing.
The reason nobody can quote a window repair over the phone is that “my window is broken” describes at least five unrelated failures.
What’s actually wrong
Condensation between the panes. The seal on the insulated glass unit has failed and moisture is inside the sealed cavity. The window still functions; its insulating value is reduced and it looks permanently foggy. This is a glass unit failure, not a frame failure.
The sash won’t stay up. A broken balance or spring in a double-hung. The window is otherwise fine. This is one of the cheapest repairs there is.
Cracked or broken glass. A pane replacement in a frame that’s still sound.
Draughty and hard to operate. Usually worn weatherstripping, a warped sash, or a frame that has moved. Sometimes a straightforward fix, sometimes the sign of something structural.
Rot at the sill or frame. On wood windows. This is the one that escalates, because it’s rarely confined to what you can see.
Which are worth repairing
| Problem | Usually |
|---|---|
| Broken balance or spring | Repair — cheap and quick |
| Cracked pane, sound frame | Repair |
| Torn or missing screen | Repair — $50 to $150 each |
| Worn weatherstripping | Repair |
| Failed seal, fogged glass | Depends — see below |
| Rot in the frame or sill | Replace, and check the neighbours |
| Frame out of square, won't close | Replace |
The failed seal question
This is the one people ask about most, and it has a genuinely mixed answer.
The glass unit can be replaced within the existing frame, which costs less than a whole window. But on an older window the surrounding frame and hardware are the same age as the seal that just failed, so you may be putting a new glass unit into a frame that has a few years left in it.
Two things push the decision toward replacement: the window is more than about fifteen years old, or several units have fogged. A single failure on a relatively new window is a repair. Three failures across a house is the glazing generation reaching the end of its life.
When replacement wins even though repair is possible
When you’re already replacing others. The crew is on site, the setup cost is spent, and the marginal cost of one more window is at its lowest. This is the single most common reason a borderline repair becomes a replacement, and it’s a good reason.
When the frame material is the problem. Aluminium frames in a cold climate condense at the frame regardless of what you do to the glass. That’s a material limitation, not a fault — see window frame materials compared.
When rot is involved. Rot found at a sill is rarely only at the sill. The water reached it from somewhere, and that path is usually behind the trim.
Why you can’t get a repair price remotely
Our cost tool prices replacement, not repair, and that’s deliberate. A broken balance, a failed seal and cracked glass are very different jobs, and which one you have — plus whether the frame is sound behind it — can only be established by someone looking at the window.
Anyone quoting a repair number sight unseen is quoting an average, not your window.
The check worth doing first
Walk the house and sort every problem window into one of the five categories above. Count them.
If most are balances, screens and weatherstripping, you have a maintenance afternoon. If most are fogged units on windows of the same age, you’re looking at a replacement project, and the arithmetic in window replacement cost applies.
That count is also what decides whether you do them all at once — see replacing windows in phases.
