Casement Window Repair in Wellington
Glass and Window Repair Wellington repairs casement windows across the city. Casements are side hung and swing out like a door, and they turn up in both old timber joinery and modern aluminium. We replace hinges, friction stays and fasteners, square up sashes that have sagged, and free timber casements that have swollen or been painted shut.
- Hinges, stays and fasteners replaced on timber and aluminium
- Sagging sashes squared and rehung
- Timber casements eased and draught proofed
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Casements fail differently to awnings because the weight hangs off one edge. Over time the sash drops at the outer bottom corner, so it catches the frame and the fastener no longer lines up. In timber joinery the same sag is often made worse by the bottom rail taking on moisture, which is a very Wellington problem on south and west facing elevations.
Sag at the outer bottom corner
The classic casement fault. The hinge or stay has worn, the sash has dropped a few millimetres, and it now binds on the frame just as it closes. People plane the sash to make it fit, which works for a season and then leaves a gap once the hardware is fixed.
The right sequence is to replace the hardware, rehang the sash square, and only then deal with any remaining fit issue.
Timber casements and moisture
A timber casement that binds in winter and closes fine in summer is taking on moisture. That means the paint film has broken somewhere, usually on the bottom rail or the outer face of the stile.
Easing the sash without fixing the paint just means it rattles in summer and binds again next winter. We look at the coating and the end grain as part of the job.
Fasteners and stays
Traditional casement fasteners and peg stays are still made and still the right hardware on a character home. Modern aluminium casements use friction stays and cam handles. Both wear at predictable points and both are inexpensive to replace.
Why casements sag and what to do first
Hardware before timber
The instinct when a casement binds is to plane the sash. That works for a season and then leaves a permanent gap once the real cause is fixed, because the sash is now smaller than the opening.
Replace the hinges or stay first, rehang the sash square, and only then deal with any remaining fit problem. Nine times in ten there is not one.
Seasonal binding is a paint problem
A timber casement that sticks in winter and closes fine in summer is taking on moisture, which means the paint film has broken somewhere. Usually it is the bottom rail or the outer face of the stile where nobody looks.
Easing the sash without fixing the coating gets you a window that rattles in summer and binds again next winter.
Casement Window Repair at a glance
- Timber hardware
- Casement fasteners, peg stays, butt hinges, sash lifts
- Aluminium hardware
- Friction stays, cam handles, keepers
- Sag repair
- Hardware replaced first, sash rehung square, then fit adjusted
- Moisture
- Paint film and end grain checked where a sash binds seasonally
- Draught proofing
- Brush or compression seal fitted to timber casements
Casement Window Repair in Wellington: common questions
My casement window catches at the bottom corner. What is it?
The hinge or stay has worn and the sash has dropped. Replace the hardware and rehang it instead of planing the sash.
Why does my timber window only stick in winter?
It is taking on moisture through a break in the paint film. Fixing the coating matters as much as easing the sash.
Can old casement fasteners still be bought?
Yes, traditional patterns are still made and we can match most character hardware.
Recent Wellington jobs
Got three quotes for retrofitting the front of the house. Only ones who measured every opening and explained why the north facing rooms needed different glass. Eleven windows over two days, and the road noise dropped more than I expected.
Landlord here. Had four properties assessed for the Healthy Homes ventilation rule and two needed openable sashes freed up rather than new joinery, which saved me a fortune. Straight answers, written report, no upselling.
Ranch slider had been jamming for years and we assumed it needed replacing. Turned out to be rollers and a bent track. Two hours, a fraction of the price we were braced for.
Fogged unit in the lounge, measured on the Tuesday and in by the following Monday. Fair price and they cleaned up after themselves.
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