uPVC Door Repair vs Replace Cost | The Real Ten-Year Maths

A new uPVC door from a local installer in the BL6 area will set you back somewhere between £800 and £1,600 fitted. Homeowners in Lostock and Brownlow Fold get that quote, wince, and sign on the dotted line. What most of them don't know is that the door itself is rarely the problem.

The multipoint lock gearbox and the cylinder are responsible for the vast majority of uPVC door faults: keys that won't turn, handles that drop, doors that won't lock at the last point. Both are serviceable parts. Both cost a fraction of a new door to fix.

Here's what the numbers actually look like over ten years.

The Two Paths, Side by Side

That's a saving of roughly £835 on a mid-range door. On a higher-spec install, the gap is wider.

The door replacement figure is conservative. A composite or fully reinforced uPVC door to PAS24 standard, properly fitted in BL6, is closer to £1,400 to £1,600. Cheap installs at £700 to £800 tend to use hardware that'll give you the same gearbox problem in three years anyway.

What Actually Wears Out

The door frame, slab and glass unit don't wear out. Not in ten years, not in twenty. What wears out is the moving hardware.

Gearboxes. The multipoint lock body, often a Fuhr, GU, Maco or Lockmaster unit, is a mechanical component. It gets used twice a day, every day. The rollers, hooks and deadbolt all run on internal springs and cams. After eight to twelve years, or sooner if the door was never adjusted correctly, parts start to bind or fail. A replacement gearbox costs £60 to £90 in parts. Labour to fit it is £60 to £80. Total: £120 to £170, depending on the make.

Cylinders. A standard euro cylinder that came with your door from a window company in 2016 is almost certainly not anti-snap. It's probably not even close. Swapping it for an Ultion, Avocet ABS or Mul-T-Lock 3-star TS007 cylinder at the same time as any gearbox work costs £40 to £65 for parts and is ten minutes' extra work. That's the sensible moment to do it.

Hinges. Adjustable uPVC hinges do work loose over time, and a door that's dropped a few millimetres at the hinge side will stress the gearbox hooks badly. A hinge adjustment or replacement is £40 to £90. It also protects the gearbox you've just paid to have fitted.

When a New Door Does Make Sense

Some doors genuinely need replacing. A frame that's warped badly, a slab that's delaminating, a sealed unit that's misted. If your door is pre-2010 and was never PAS24 compliant, there's also a security argument for upgrading the whole unit, especially if you're renting out a property in Westhoughton or Adlington and need to satisfy insurance requirements under BS8621 or BS3621.

But those are specific situations. They're not the norm. Most of the "I need a new door" calls I get turn out to be a tired gearbox and a cylinder that's on its last legs.

How to Spend the Money Sensibly

If your door is stiff, the handle drops, or the key feels like it's fighting you, get a locksmith to assess the mechanism before you call a window company. The window company's incentive is to sell you a door. A locksmith's job is to fix what's broken.

If the gearbox is going, replace it with a quality unit, Fuhr 856 or a Maco equivalent, not the cheapest thing on the shelf. At the same time, fit an Ultion or Avocet ABS cylinder. Do it once, do it properly, and that door will outlast most of the new installs on your street.

If you're in Horwich, Blackrod, Aspull, Bromley Cross or anywhere else in the BL postcodes, Locks Local can usually be with you in under 30 minutes. Pricing is given honestly over the phone before anyone comes out. If the door needs replacing rather than repairing, that's what you'll be told.