Aluminium window finishes: powder coating, anodising and wood-grain colours

One of aluminium’s big advantages is that the frame can be almost any colour, and the finish is factory-applied, so it lasts for years without repainting. The two main finishing processes are powder coating and anodising, with wood-grain finishes as a popular variation.

Powder coating

A dry powder is sprayed onto the cleaned and pre-treated aluminium and then baked in an oven, where it melts into a hard, even coat.

• Colours: practically unlimited — any shade from the RAL colour chart, in matt, satin, gloss or fine-textured finishes.
• Popular choices: matt black and anthracite grey for modern homes, white for a clean classic look, and bronze or champagne tones for warmth.
• What decides quality: the surface pre-treatment and the coating thickness. A well-applied coat resists chalking and fading for many years.

Anodising

An electrochemical process that thickens aluminium’s own natural oxide layer. The finish becomes part of the metal itself rather than a layer on top, so it can’t peel or flake.

• Look: metallic — natural silver, champagne, bronze shades and black — with the texture of the metal showing through.
• Keep in mind: the colour range is narrower than powder coating, and small shade variations between batches are normal.

Wood-grain finishes

A powder-coated base with a wood pattern transferred onto it. You get the warmth of teak or walnut without timber’s rot, termites, swelling or polishing.

• Good for: traditional and heritage-style homes, hill cottages and interiors with lots of wood.

Dual colour

The outside and inside of a frame can be finished differently — for example, anthracite grey outside to match the elevation and white inside to match the walls.

Choosing a colour

• Modern and minimal: black or anthracite grey frames make glass look larger and frames look slimmer.
• Bright interiors: white or light grey frames blend into the walls.
• Warm, classic homes: bronze, champagne or wood-grain.
• Match the hardware: handles and hinges come in matching finishes — black on black looks especially clean.

Looking after the finish

Wash frames with water and a mild soap a few times a year, more often in dusty areas. Avoid abrasive pads and harsh solvents. That’s all the maintenance a good aluminium finish needs.

Colours look different on a screen than in daylight, so always choose from physical samples. You can see profile and colour samples at our Zirakpur office.