Window & Door Hardware
UPVC systems get discontinued long before the windows wear out. A vent flap, a winder handle, a blind bracket — parts that cost pennies to make, are completely unobtainable, and somehow end up as a quote for a whole new window. Copying the broken one is usually the whole job.
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Get a window & door hardware estimate
Upload your file or describe the part. We review printability before confirming anything.
Common uses
- Window crank and winder handles, covers and caps
- Trickle vent flaps, covers, hoods and end caps
- Blind brackets, chain guides, wand connectors and end caps
- Discontinued UPVC trim, beading clips, end caps and gasket corners
- Hinge covers, escutcheons and handle rose plates
- Conservatory and roof vent fittings
Not locks, not security, not fire doors
This is the line and it does not move. We do not print locks, cylinder parts, gearboxes, espagnolette components, keeps, strikers, restrictor parts, or anything else that a window or door's security depends on. Those parts are tested to standards — PAS 24 and the rest — and your insurance quietly assumes they are the parts that were tested. A printed copy is not tested, not rated, and we do not have the approvals to say otherwise. The same applies to fire door hardware: closers, latches, intumescent components, anything on a door whose job is to hold back a fire for thirty minutes. That is a life-safety item and printed plastic has no business near it. If a part's job is to stop somebody getting in, or to keep a door shut in a fire, buy the proper part from the proper supplier. Handles you turn, covers you look at, vent flaps, blind fittings and trim: that is a large and genuinely underserved list, and it is where we can help.
Copying a part the system maker has dropped
Start by looking inside. The system name and often a part number is moulded into the back of most UPVC fittings, and a photo of it saves a lot of guesswork. Then send the broken part, or its opposite number from another window if the original is in fragments. The dimensions that decide it are the ones nobody thinks to measure: spindle size and shape (7mm and 8mm square are the common ones), screw centres (43mm and 92mm PZ turn up constantly), backset, handedness, and the thickness of the frame section the part clips to. We model it, share the file so you can check it against the window, and print one to try before printing the set — because the whole point of this is that you probably need the same part on six windows.
Sunlight through glass, and the colour question
A window is the most brutal UV environment in a house, and it does not spare the inside face — a south-facing sill gets more sun than most garden furniture. ASA is the default for anything on a window, inside or out, because it is genuinely UV-stable and stays tough when it is cold. PETG is fine for a shaded interior fitting or a blind bracket in a north-facing room. PLA will yellow, sag and go brittle on a sill within a season, and we would rather turn a job down than send it. On colour: we can get close to white, brown, anthracite or cream, but we cannot match exactly, printed and moulded surfaces catch the light differently, and every plastic on a window shifts colour with sun over time — the existing frame has already shifted, which is half the problem. The consolation is that you own the file, so when the part does eventually give up, reprinting it costs materials rather than another hunt through discontinued stock.
How it works
Send your file or describe the part
Upload an STL, OBJ, 3MF or STEP file, or tell us what you need with photos and a few measurements.
Get a guide price
When we can read the geometry we estimate from it straight away — material, print time, supports and quantity all priced openly.
We check printability, then confirm
A person reviews orientation, wall thickness and supports, flags anything that will not print well, and confirms your final quote before any work starts.
Window & Door Hardware — example prices
Worked examples on real models from our print library, priced by the same calculator that estimates your own part. Sizes span small to large so you can see how cost moves with the part.
| Example part | Size | PLA | PETG | ABS / ASA |
|---|---|---|---|---|
| M4 Washer | 12 × 12 × 2 mm | £0.09 – £0.12 | £0.10 – £0.13 | £0.11 – £0.14 |
| Standoff M3x10 | 8 × 8 × 10 mm | £0.18 – £0.23 | £0.19 – £0.24 | £0.22 – £0.28 |
| Wing Nut M6 | 36 × 14 × 8 mm | £0.67 – £0.86 | £0.72 – £0.92 | £0.81 – £1.04 |
| Control Knob (large) | 45 × 45 × 20 mm | £7.89 – £10.08 | £8.25 – £10.55 | £9.02 – £11.52 |
Guide prices for a single unit, calculated from the measured geometry of each example model — not fixed quotes. Small parts land at or near the £0 minimum order, and per-unit prices fall with quantity. Your price depends on your own part, its material and its printability. How pricing works.
Example models for window & door hardware
Open-source designs from our print library that show the kind of part this service suits. View any of them for a full material and quantity price breakdown.
L-Bracket (small)
10mm Cable Clip
Control Knob (large)
4mm Cable Clip
These are open-source example designs (CC0) we publish to show what the process suits and what it costs — not a record of past jobs. Prices shown are examples in PLA.
Window & Door Hardware — FAQ
Can you print a replacement window lock or handle mechanism?+
We will do the handle; we will not do the lock. Anything security-rated — cylinders, gearboxes, espagnolettes, keeps, restrictors — is tested to standards a printed part has not met, and your insurer is entitled to assume the tested part is fitted. Those you buy properly.
My trickle vent is discontinued. Can you copy it?+
Good fit. Send the vent or its cover, photograph any system name moulded on the back, and give us the frame section it fits. Vents are usually a simple shape with fiddly clip geometry, and once the file exists a set for the whole house is cheap.
Will the colour match my white UPVC?+
Close, not exact. Filament white is not your frame's white, printed and moulded surfaces reflect light differently, and your frames have already shifted with sun exposure. For a small part in a shadow it reads fine; if it needs to disappear on a front elevation, plan to paint it.
Will a printed handle stand up to daily use?+
A crank or handle body in ASA or PETG does fine — it is a hand-load part, not a structural one. The weak points are printed threads and thin spindle sockets, so we design in a brass insert or retain the original metal spindle rather than asking plastic to do a metal part's job.
How much does window & door hardware cost?+
There is no fixed per-item rate — price comes from how much plastic the part uses, how long it takes to print, how much support and finishing it needs, and how many you want. The example table above shows what real parts of this kind work out at. Upload your file for a guide price on your own part.
How long does it take?+
It depends on the size of the part, the queue and the material. Tell us your deadline when you enquire and we will tell you honestly whether it is achievable before you commit.
Can I order one of the models from your library?+
Yes. Every model in our print library is a design you can have printed — pick one, choose a material and quantity, and the example price on its page is your starting point. You can also download the file and take it elsewhere; they are all CC0.
Are my files kept private?+
Yes. Uploaded files go to private storage, are never made public, and are only used to quote and produce your job.
Worth reading first
Practical guides that help you get a better part and a more accurate quote.
What Is TPU (Flexible Filament)?
TPU is printable rubber. It bends, grips, seals and absorbs shock — and it behaves nothing like PLA, which is the whole point and the whole difficulty.
Nylon and Carbon Fibre Parts
The engineering end of FDM. Nylon is tough and wear-resistant; carbon fibre makes it stiff and stable. Both are harder work — here is when that pays off.
How to Copy a Part Without CAD
No file, no drawing, just a broken part and a pair of calipers. That is a perfectly normal starting point — here is how the process actually works.
Other services
Get a 3D print estimate
Upload your file or describe the part. We review printability before confirming anything.