Aluminium window colours are decided before the window is made, not after, because the finish goes onto the profile at the factory. It is one of the few choices on an aluminium window that cannot be changed later, so it is worth a few minutes of thought.
Two ways to finish aluminium
Powder coating is a polyester powder applied electrostatically and cured in an oven. It forms a hard coloured layer over the profile, and it is where the widest range of aluminium window colours comes from.
Anodising is different. It thickens the natural oxide layer on the aluminium electro-chemically, so the finish is part of the metal rather than a coating on top of it.
Anodised finishes are metallic in character, natural silver through to bronzed tones, rather than a colour chart.
Neither needs repainting. Both are washed down with clean water and a mild detergent.
Which finish for which job
Powder coating gives you choice. If the frames have to match a colour scheme, a roof, or existing joinery, this is the route.
Anodising gives you durability of a different kind. Because the finish is integral, it cannot chip off the way a coating can.
The practical difference shows up in repair. A scratch in powder coating can be touched in. Damage to an anodised surface is harder to disguise, because you are looking at the metal itself.
What should actually drive the choice
Exposure first. Coastal air is harder on every finish, and if the building is near the sea you should say so when you enquire rather than choosing from a chart alone.
Orientation second. Dark colours absorb more heat, which is worth thinking about on a west-facing elevation in a South African summer.
Surroundings third. Frames are seen against the wall, the roof and the garden, never on their own. A colour that looks striking on a sample can disappear or clash once it is up.
Matching existing frames
If you are adding to or replacing part of an existing installation, do not order by colour name.
Names are not consistent between suppliers or over time, and a frame that has been up for ten years has weathered.
Send a physical sample or the original specification if you have it. That is the only reliable way to match.
Inside and outside
The two faces of a frame do not have to be treated as one decision.
The outer face takes the weather and sets the look of the building. The inner face is what you see every day from inside the room.
Remember the sash edges too. They are invisible when the window is shut and obvious whenever it is open.
Getting it right first time
Ask for the finish type, not just the shade, because a colour name alone does not tell you whether it is powder coated or anodised.
Look at any sample in daylight, held against the wall it will sit in, not under showroom lighting.
Then confirm before manufacture. Once the profile is coated, changing the colour means new profile.
See the range under aluminium windows, browse by dimension with shop by size, or request a quote and tell us the exposure and the match you need.
Coetz supplies nationwide across South Africa and does not install. For glazing and finishing standards, SAGGA, the South African Glass and Glazing Association is the industry reference.
Aluminium window colours and the rest of the building
Frames are a line drawing on an elevation. They read as edges rather than areas, which is why aluminium window colours behave differently from wall paint.
A frame that contrasts with the wall draws the eye to the shape of the opening. A frame close to the wall colour lets the glass dominate.
Neither is right. But decide which effect you want before you choose, because it is the single biggest visual consequence of the colour.
Aluminium window colours on doors and windows together
If you are ordering windows and doors in the same project, specify the finish once and apply it across both.
Mismatches are most visible where a door and a window sit in the same elevation, and they are avoidable by ordering together.
Sampling aluminium window colours properly
Hold the sample vertically, as the frame will sit, not flat on a table. Colour reads differently at different angles.
Look at it in the morning and again in the afternoon. South African light is strong and directional, and it changes a finish considerably through the day.
Check it against the roof as well as the wall, particularly on a single storey where the roof edge is close to the window head.
The one irreversible decision
Almost everything else about an aluminium window can be adjusted, replaced or upgraded later. Seals, stays, handles and even glass.
Aluminium window colours cannot. The finish is on the profile, and changing it means new profile.
That is the whole reason this decision deserves more time than it usually gets.
Aluminium window colours: at a glance
Decided before manufacture. Aluminium window colours go onto the profile at the factory.
Two finish families. Powder coating for choice of colour, anodising for an integral metallic finish.
Exposure matters. Say so if the building is coastal.
Match by sample. Never order aluminium window colours by name alone.
Frequently asked questions
Can aluminium window colours be changed after installation?
Not practically. The finish is applied to the profile before the window is made up.
Do powder coated frames need repainting?
No. They are washed, not repainted.
Is anodising better than powder coating?
Neither is better outright. Anodising is integral and very durable; powder coating gives far more colour choice.
Do dark frames get hot?
Dark colours absorb more heat than light ones, which is worth considering on a west-facing elevation.
How do I match existing frames?
Send a physical sample or the original specification. Colour names alone are not reliable.
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