An aluminium sliding window lock holds the sliding panel closed against the frame, and the type you get depends on the sliding system. Coetz™ sliding windows come with the lock fitted: a flush sliding lock handle on the Standard system, and a hook lock on the Premier and Horizon systems. This guide explains each lock, the optional cylinder, how to lock up properly, and what to check when a sliding window will not lock.
In this guide
Aluminium sliding window lock by system
| System | Lock included | Handle | Option |
|---|---|---|---|
| Standard | Flush sliding lock handle | The lock handle itself | Natural or white handle instead of black |
| Premier | Hook lock | Fitted with the lock | Half-knob cylinder |
| Horizon | Hook lock | Stainless steel flush pull | Half-knob cylinder |
Every aluminium sliding window lock comes fitted to the window, so there is nothing extra to buy for it to lock. See aluminium sliding window sizes for the systems and prices.
The flush sliding lock handle
On the Standard system, the handle and lock are one part, set flush into the sliding panel so the panels can pass each other. Close the panel fully and turn the handle to lock it. The hardware is black as standard, and natural or white handles are available.
The hook lock
On Premier and Horizon windows, a curved hook swings out of the sliding panel and catches a keep, pulling the panel tight against the frame and its seals. A straight bolt would slide out of a sliding panel, which is why a hook is used. The optional half-knob cylinder adds a knob on the inside for operating the lock. For the same lock on doors, see aluminium sliding door lock.
Locking up properly
Follow these steps each time you use an aluminium sliding window lock:
- Slide the panel fully closed, until it sits against the frame.
- Check the meeting stiles line up from top to bottom.
- Engage the lock with the handle or knob.
- Pull the panel gently to check that the aluminium sliding window lock holds.
On a 3 or 4 panel window, lock every sliding panel, not just the one you use most.
When a sliding window will not lock
- Grit in the track stops the panel closing fully. Vacuum the track.
- Worn or dirty rollers (the wheels under the panel) make the panel run low or stiff. Clean them; if they are worn, they may need replacing.
- The panel has dropped, so the lock no longer meets its keep.
- The keep screw is loose. Tighten it gently.
Never force a stiff aluminium sliding window lock; the cause is usually alignment, not the lock. If a window leaks at the track, see aluminium windows leaking.
Looking after the lock
Vacuum the track every few weeks, wipe the lock and handle with mild soap and water, and use a dry silicone spray on moving parts rather than oil, which attracts dust. At the coast, rinse the frames with fresh water more often; see coastal aluminium windows.
Security beyond the lock
An aluminium sliding window lock is one part of a secure window. Every window uses 6.38 mm laminated safety glass, which holds together if broken, and a frame fixed firmly into the opening matters as much as the lock. See are aluminium windows secure?.
Ordering
Choose the size and system, and the lock comes fitted. Coetz™ supplies the windows ready to fit; your builder or installer fits them. We deliver across South Africa, or you can collect free from Laser Park. Glazing must meet SANS 10400-N, published by the South African Bureau of Standards. See aluminium sliding windows.
Aluminium sliding window lock: frequently asked questions
What lock does an aluminium sliding window have?
The Standard system has a flush sliding lock handle; Premier and Horizon windows have a hook lock.
Is the lock included with the window?
Yes. Every sliding window comes with its lock fitted; a half-knob cylinder is optional on Premier and Horizon.
Why will my sliding window not lock?
Usually grit in the track or worn rollers stop the panel closing fully, so the lock cannot engage.
Can I get a white or natural handle?
Yes. The Standard system’s lock handle is black as standard, with natural and white available.
Should I oil the lock?
No. Use a dry silicone spray, because oil attracts dust and grit.
Coetz™, Unit 2, 84 Ridge Road, Laser Park, Johannesburg. Call 010 412 0062, WhatsApp 076 613 4418 or use our contact page.
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