Top hung aluminium windows are hinged at the top and open outward from the bottom — the most widely used opening window in South African homes, offices and outbuildings, and the largest family in the Coetz™ range, with more than 270 standard sizes and configurations priced online.
Buying a top hung window online
Every Coetz™ top hung window is a genuine architectural-grade aluminium unit manufactured to order. Choose your width and height from the standard range, pick a configuration by the number of opening panes (one to four), choose your colour, and check out — the drawing on each product shows the exact pane layout viewed from the inside, so you always know which panes open.
Dimensions available
Standard widths run from 450 mm to 3000 mm and heights from 450 mm to 2100 mm, with one to four opening sashes. Every product title includes the exact size, and Width/Height attributes make filtering simple.
Glass and colour options
Standard glazing is 6.38 mm Clear Laminated Safety Glass on every unit – we supply clear glass only. Final glass selections are confirmed before manufacturing.
Standard finish is White, with Bronze, Charcoal, Black and Natural Anodised (N25) also available. Black and Natural Anodised cost a little more than White.
Browse top hung windows
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Coetz™ Top Hung – 1200 × 1200 mm – 4-Pane (600 mm Vent)
Price range: R5 709,00 through R6 851,00 (excl. VAT) Select options This product has multiple variants. The options may be chosen on the product page -
Coetz™ Top Hung – 1200 × 1200 mm – Contemporary Single Opener
Price range: R3 842,00 through R4 649,00 (excl. VAT) Select options This product has multiple variants. The options may be chosen on the product page -
Coetz™ Top Hung – 1200 × 1200 mm – Single Opener
Price range: R3 475,00 through R4 585,00 (excl. VAT) Select options This product has multiple variants. The options may be chosen on the product page -
Coetz™ Top Hung – 1200 × 1200 mm – Single Opener (900 mm Vent)
Price range: R3 487,00 through R4 184,00 (excl. VAT) Select options This product has multiple variants. The options may be chosen on the product page -
Coetz™ Top Hung – 1200 × 1200 mm – Twin Opener
Price range: R3 948,00 through R4 794,00 (excl. VAT) Select options This product has multiple variants. The options may be chosen on the product page -
Coetz™ Top Hung – 1200 × 1200 mm – Twin Opener (600 mm Vent)
Price range: R4 291,00 through R5 149,00 (excl. VAT) Select options This product has multiple variants. The options may be chosen on the product page -
Coetz™ Top Hung – 1200 × 1200 mm – Victorian Twin Opener
Price range: R3 987,00 through R4 784,00 (excl. VAT) Select options This product has multiple variants. The options may be chosen on the product page -
Coetz™ Top Hung – 1200 × 1500 mm – 4-Pane (600 mm Vent)
Price range: R6 636,00 through R7 963,00 (excl. VAT) Select options This product has multiple variants. The options may be chosen on the product page
Questions about top hung aluminium windows? Call 010 412 0062 or WhatsApp 076 613 4418 and our team will help with sizes, colours and lead times. You can price top hung aluminium windows in your own sizes with the online estimator, then order online or send the list for a quote.
Every order for top hung aluminium windows is made to your sizes, glazed with 6.38 mm clear laminated safety glass and supplied ready for your own installer.
What to expect from Coetz Glazing
Every top hung aluminium windows order at Coetz starts with your sizes and a fixed price online, so you know exactly what you are getting before anything is made.
We manufacture to size in our own factory, glaze with 6.38mm laminated safety glass as standard, and powder-coat the aluminium in the colour that suits the building.
Because we manufacture and supply every top hung aluminium window ourselves, one accountable team looks after your order from order to delivery, backed by our manufacturer warranty.
Why aluminium is the right choice
For top hung aluminium windows, aluminium is the material that lasts. It will not rust, warp or rot, it shrugs off the South African sun, and it needs almost no maintenance beyond an occasional wipe-down.
Our frames are available in five finishes – White as standard, Bronze and Charcoal at the same price, and Black and Natural Anodised at a small premium, so the windows match the architecture instead of fighting it. Slim sightlines let in more glass and more daylight.
Every unit is glazed with 6.38mm laminated safety glass as standard, which improves security, cuts outside noise and holds together if it is ever broken.
We manufacture top hung aluminium windows to your exact sizes in our own factory, so there is no waiting on imported stock and no compromise on fit. Large and repeat orders are planned and delivered on schedule.
From a single building to a full development, Coetz manufactures and supplies what we make. One accountable team, one point of contact, and our manufacturer warranty stands behind every order.
Delivery and collection
Every item is manufactured to order and supplied ready for collection from our Laser Park, Johannesburg premises or delivered — Johannesburg (1–3 working days from dispatch), Gauteng (2–5) and national (3–7), with the exact rate calculated automatically at checkout. All catalogue prices exclude VAT.
How top hung aluminium windows work
A pair of friction stays is fixed along the head of the frame and the top of the sash. When you release the handle, the sash pivots on those stays and the bottom edge swings outward. Friction in the stays holds the sash wherever you leave it, so there is no prop or catch to set.
That is the whole mechanism, and it is why top hung aluminium windows have so little to go wrong compared with a sliding sash running in a track.
Where top hung aluminium windows suit a room
- Bathrooms. A top hung sash can be left slightly open in light rain for ventilation without water coming in.
- Bedrooms. The same applies at night, when nobody is awake to close up if the weather turns.
- Above a kitchen counter. The sash opens away from the worktop rather than over it, so nothing has to be moved to reach the handle.
- Upper floors and furnished rooms. No sash swings inward across the room, which matters where furniture sits under the window.
Top hung aluminium windows vs sliding windows
A sliding window opens at most half the frame, because one panel has to pass behind the other. A top hung sash opens its full width, and you control the angle rather than the width. Sliding windows also run in a bottom track that collects grit and needs cleaning; a hung sash has no track at all.
Against that, a sliding window projects nothing outside, which matters on a narrow walkway or against a boundary wall. Compare the two in our aluminium sliding windows range.
Combining opening sashes and fixed panes
Most top hung windows are not a single sash. A frame usually combines one or more opening sashes with fixed panes: a wide opening might have two top hung sashes over a continuous fixed pane, and a narrow one a single sash over a fixed pane. Fixed panes cost less than opening sashes because they carry no hardware, so put the openers where you will actually use them. The drawing on every product shows which panes open, viewed from inside.
Looking after top hung aluminium windows
- Wipe the friction stays and the frame rebate twice a year. Grit and paint between sash and frame are the most common reason a sash stops closing cleanly.
- Check that both stays travel evenly. If one moves further than the other, the sash meets the seal crooked and draughts follow.
- Wash the frames with clean water and mild soap. The powder-coated finish never needs repainting, and abrasive cleaners will dull it.
- Replace the rubber seal if it hardens. It is a cheap part and it is what keeps the window weathertight.
Our aluminium window cleaning guide covers the full routine, and top hung window not closing explains the common fixes.
Top hung aluminium windows: prices
Top hung aluminium windows start from R1 191 excl. VAT for a 450 × 450 mm single opener in White. A 600 × 600 mm single opener is R1 481, and a 900 × 600 mm single opener is R1 816. Prices rise with size and with the number of opening sashes. Bronze and Charcoal cost the same as White, Black costs 10% more and Natural Anodised 20% more. Every price includes 6.38 mm clear laminated safety glass. Prices as at 18 October 2026; the shop and the online estimator always show the current price.
Frequently asked questions
What is a top hung aluminium window?
A top hung window is hinged along the top edge of the sash and opens outward from the bottom, providing ventilation while shedding rain away from the opening. It is the standard opening window type in the Coetz™ range.
What sizes do top hung aluminium windows come in?
The Coetz™ standard range covers widths from 450 mm to 3000 mm and heights from 450 mm to 2100 mm, in configurations with one to four opening panes. Non-standard sizes can be quoted as custom work.
What glass comes standard in the windows?
6.38 mm Clear Laminated Safety Glass is the standard specification on every unit – we supply clear glass only.
Do you deliver top hung windows nationally?
Yes — windows are supplied from Johannesburg with delivery throughout Gauteng and South Africa, or free collection from Laser Park, Johannesburg.
Related
Also see patio sliding doors and hinged doors. See the full aluminium windows and aluminium doors ranges, glass cut to size, delivery details and trade accounts with tiered pricing.
For background, see this aluminium overview.
Care guide: how to clean aluminium windows — keep the frames looking new and the tracks sliding smoothly.
Top hung guides: top hung window sizes, top hung window designs and how to clean top hung windows.
