Doors get used thousands of times a year and take the weather full on, so it is no surprise they are the part of a house that most often starts to misbehave. The good news is that plenty of door problems are adjustments or part swaps, not a reason to rip the frame out.
We would rather tell you a door can be saved than sell you one you do not need. That is the spirit of this guide: work out what is actually wrong first, then decide.
Start with the symptom
| What you notice | Likely cause | Usually a repair or replacement? |
|---|---|---|
| Door catches or scrapes at the bottom | Hinges out of adjustment, door has dropped | Often an adjustment |
| Handle has to be lifted hard to lock | Door out of line with the keeps | Often an adjustment |
| Cold air round the edges | Worn seals or poor compression | Often a repair |
| Glass panel cloudy or misted | Failed sealed glass unit | Replace the glass, not the door |
| Glass panel loose or rattling | Beading or packers failed | Needs inspected promptly |
| Frame cracked, bowed or split at corners | Frame failure | Usually a replacement |
| Lock mechanism seized or snapped | Worn multipoint gearbox | Part swap if the door is sound |
Signs a door is worth repairing
- The frame is square and the corners are intact
- The door leaf is flat, not twisted
- The problem started gradually rather than after damage
- Parts such as hinges, seals or the lock are still available to match
- You are happy with how the door looks and how secure it feels
Signs replacement makes more sense
Some faults are not worth chasing. A frame that has split, bowed or been forced will keep going out of line however many times it is adjusted. Door leaves that have twisted will never seal evenly. And if the door is old enough that its lock and hinge design is no longer supplied, you can spend more tracking down parts than the repair is worth.
Replacement is also the answer when the problem is not really a fault at all: the door is ugly, lets light through where it should not, or simply does not feel secure. Those are fair reasons to change it, as long as you know you are choosing to rather than being told you have to.
Glass problems in doors
Misted or cloudy glass in a door panel is the same fault as in a window: the seal on the sealed unit has failed. It does not mean the door has failed. In most cases the glass unit can be swapped on its own, which is exactly what we mean by replace the pane, not the frame.
Glass that feels loose, moves when the door closes, or has cracked is different. If a panel is not held firmly it should be looked at quickly, because a door is opened and slammed far more than a window. Until then, avoid slamming the door and keep children away from the glass.
Things you can safely check yourself
Look at the gap
Close the door and look at the gap between the door and frame down both sides and across the top. It should be roughly even. A gap that is wide at the top on the hinge side and tight at the bottom on the lock side is the classic sign of a dropped door.
Test the seals
Close the door on a sheet of paper at several points round the edge. If it slides out easily in one area, the seal is not compressing there.
Feel the lock
If the handle needs forcing to throw the bolts, stop forcing it. That strain is what snaps multipoint gearboxes. Getting the door realigned is cheaper than replacing a broken lock.
If you do replace it
Replacement doors are measured to the structural opening and made to measure. We fit composite and uPVC front and back doors, French doors, patio sliding doors and bifolds. Your written quote will set out the proposed work and fitting arrangements.
If you are unsure which way to go, a free survey will tell you. If it is a repair, we will say so.
Common questions
Often, yes. If the frame is sound, a dropped door can usually be brought back into line by adjusting the hinges and keeps.
Normally not. The sealed glass unit can usually be replaced on its own.
It depends on the opening and how exposed it is. Our uPVC vs composite guide covers the differences in detail.
Want a straight answer on your own windows or doors?
DM Installations fits and repairs windows and doors across Central Scotland — Cumbernauld, Glasgow, Falkirk, Stirling and the surrounding towns. Free survey, written quote, and an honest answer on whether you need a repair or a replacement.
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