Repair or Replace? uPVC Windows and Doors Explained
Zak Snow

When a window won't lock or a door starts sticking, it's easy to assume it needs replacing. Most of the time it doesn't. uPVC frames last a long time, but the moving parts and seals wear out much sooner. Replacing the part that has failed is usually quicker and far cheaper than a new window or door, and it avoids throwing away a frame that's still sound.
Problems that can usually be repaired
Stiff, sticking or dropped doors: realigning the door and adjusting the hinges and keeps.
Doors that won't lock or handles that are floppy or stuck: a new gearbox, multipoint lock, handle or cylinder.
Windows that drop, catch or won't stay open: new friction hinges.
Windows that won't lock: a new locking mechanism or handle.
Misted or cloudy glass: a new sealed glass unit in the existing frame.
Cracked or broken glass: a replacement pane or unit.
Draughts and leaks: new seals and gaskets, and clearing blocked drainage.
When replacement makes more sense
The frame itself is damaged: cracked, badly warped, or broken at the corners.
Timber frames are rotten, beyond a sensible repair.
Very old single glazing or early double glazing, where a modern window will be much warmer.
Several things have failed at once, so the repairs add up to most of the cost of a new one.
You want a change: a different style, colour, or more security.
Questions to ask yourself
Is the frame sound, without cracks, rot or warping?
Is the problem one part (a hinge, lock, handle or glass unit) or everything?
Are you happy with how it looks and how warm the room is?
If the answers are yes, one part, and yes, a repair is very likely the better option.
If you do replace: use a FENSA approved installer
In England and Wales, replacement windows and doors must meet Building Regulations. Using a FENSA approved installer means the work is registered for you and you get a FENSA certificate, which you'll need when you sell your home. Door & Window Surgeon is a FENSA approved installer (registration number 44811). Read more about FENSA and what it means for you and our installation service.
Not sure? Ask for an honest opinion
Send us a photo or short video on WhatsApp and we'll tell you whether it's a repair or a replacement, with a free estimate. We cover Bridgwater, Taunton, Highbridge, Weston-super-Mare, Cheddar, Glastonbury, Wellington and the surrounding areas. Or request a free quote.
When a window won't lock or a door starts sticking, it's easy to assume it needs replacing. Most of the time it doesn't. uPVC frames last a long time, but the moving parts and seals wear out much sooner. Replacing the part that has failed is usually quicker and far cheaper than a new window or door, and it avoids throwing away a frame that's still sound.
Problems that can usually be repaired
Stiff, sticking or dropped doors: realigning the door and adjusting the hinges and keeps.
Doors that won't lock or handles that are floppy or stuck: a new gearbox, multipoint lock, handle or cylinder.
Windows that drop, catch or won't stay open: new friction hinges.
Windows that won't lock: a new locking mechanism or handle.
Misted or cloudy glass: a new sealed glass unit in the existing frame.
Cracked or broken glass: a replacement pane or unit.
Draughts and leaks: new seals and gaskets, and clearing blocked drainage.
When replacement makes more sense
The frame itself is damaged: cracked, badly warped, or broken at the corners.
Timber frames are rotten, beyond a sensible repair.
Very old single glazing or early double glazing, where a modern window will be much warmer.
Several things have failed at once, so the repairs add up to most of the cost of a new one.
You want a change: a different style, colour, or more security.
Questions to ask yourself
Is the frame sound, without cracks, rot or warping?
Is the problem one part (a hinge, lock, handle or glass unit) or everything?
Are you happy with how it looks and how warm the room is?
If the answers are yes, one part, and yes, a repair is very likely the better option.
If you do replace: use a FENSA approved installer
In England and Wales, replacement windows and doors must meet Building Regulations. Using a FENSA approved installer means the work is registered for you and you get a FENSA certificate, which you'll need when you sell your home. Door & Window Surgeon is a FENSA approved installer (registration number 44811). Read more about FENSA and what it means for you and our installation service.
Not sure? Ask for an honest opinion
Send us a photo or short video on WhatsApp and we'll tell you whether it's a repair or a replacement, with a free estimate. We cover Bridgwater, Taunton, Highbridge, Weston-super-Mare, Cheddar, Glastonbury, Wellington and the surrounding areas. Or request a free quote.
