When a standard size will not fit, Coetz™ manufactures custom aluminium windows to your exact dimensions — same architectural-grade profile, same safety glass, quoted in writing before manufacture.
When custom is the right call
- Non-standard structural openings in renovations and older homes
- Architect-specified dimensions and configurations
- Matching existing windows on additions
- Oversized or unusually proportioned openings
- Special glass or finish requirements
How custom quoting works
Send your opening sizes and requirements — by WhatsApp, the contact form, or a full schedule through the Professional Portal for multi-window projects. The team confirms the specification, glass and finish, and issues a written quotation; manufacture starts on acceptance. Custom work is always quotation-based and confirmed in writing before production.
Looking for custom aluminium windows? Coetz Glazing has you covered.
Coetz Glazing supplies custom aluminium windows across the area.
Ask our team about custom aluminium windows pricing and options.
What to expect from Coetz Glazing
Every custom aluminium windows order at Coetz starts with a free measure and a fixed-price quote, so you know exactly what you are getting before any work begins.
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 custom aluminium windows ourselves, one accountable team looks after your order from the first measure to delivery, backed by a workmanship guarantee.
Why aluminium is the right choice
For custom 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 powder-coated in any colour, from crisp white and charcoal to bronze and natural anodised finishes, 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. Double glazing and performance glass are available where thermal comfort matters.
We manufacture custom 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 a workmanship guarantee stands behind every order.
Standard range first
Many “custom” openings are actually within a standard size — check the 177-size standard range first, because standard pricing is sharper and lead times shorter.
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Sale!
Coetz™ Top Hung – 1200 × 1200 mm – Single Opener
Price range: R1 986,00 through R2 382,00 (excl. VAT) Select options This product has multiple variants. The options may be chosen on the product page -
Sale!
Coetz™ Top Hung – 1200 × 1200 mm – Single Opener (900mm Vent)
Price range: R1 993,00 through R2 391,00 (excl. VAT) Select options This product has multiple variants. The options may be chosen on the product page -
Sale!
Coetz™ Top Hung – 1200 × 1200 mm – Twin Opener
Price range: R2 256,00 through R2 707,00 (excl. VAT) Select options This product has multiple variants. The options may be chosen on the product page -
Sale!
Coetz™ Top Hung – 1200 × 1500 mm – Single Opener
Price range: R2 289,00 through R2 746,00 (excl. VAT) Select options This product has multiple variants. The options may be chosen on the product page
Glass and colour options
Standard glazing is 6.38 mm Clear Laminated Safety Glass, with Low-E and Clear SIG options available on most configurations. Final glass selections are confirmed before manufacturing.
Standard finish is Natural Anodised aluminium (N25), with Bronze, Charcoal and White powder-coated finishes available on request.
Custom Aluminium Windows
Coetz Glazing designs, supplies to spec, then services what we fit — contact us for a site measure and a fixed-price quote.
Frequently asked questions
Can you make any size window?
Custom windows are manufactured to your dimensions subject to profile and glazing limits, confirmed during quotation.
How do I get a custom window price?
Custom work is quotation-based: send your sizes and requirements and you receive a written quotation before any manufacturing starts.
Do custom windows use the same glass?
Yes — 6.38 mm Clear Laminated Safety Glass standard, with Low-E and SIG options, exactly as the standard range.
Do you supply custom windows outside Johannesburg?
Yes — custom windows are supplied nationally with delivery confirmed in the quotation.
Related
Browse aluminium windows, aluminium doors, top hung windows, patio sliding doors, stacking doors and trade accounts.
For background, see this aluminium overview.