Walk into any home 3–4 years after new aluminium doors and windows were installed, and you’ll see one of two things. Either they still look brand new — same deep black, same rich bronze, same clean white. Or they’ve gone patchy. A slightly chalky, faded look. Some spots duller than others. The frames that once matched your home’s design now look tired. Many homeowners notice issues with aluminium windows fading over time. Most people blame the sun. Or the “quality of aluminium.” Or just bad luck.

The real reason is something almost nobody explains before you buy: the powder coating — the finish applied on the aluminium.

It’s Not the Metal, It’s the Powder Coating.

Aluminium itself doesn’t fade — it’s a stable metal. What changes colour over time is the powder coating layer on top of it: the finish that gives your aluminium doors and windows their black, bronze, white, or wood-texture look.  And not all powder coating is the same. There’s a massive gap between cheap, locally sourced coating done to cut cost, and a premium coating built to hold its colour for 15–20 years.

The tricky part? You can’t tell the difference by looking at a new window or door. Both look identical on day one. The difference only shows up after 2–3 years of sun, heat, and rain — by which time everything is already fitted, and there’s no going back.

Why Aluminium Windows Fade Faster in Indian Weather

India’s climate is one of the toughest tests for any coating. Whether you’re in a hot, dry city, a humid coastal town, or a region with heavy monsoon rain, your aluminium doors and windows face the same punishing combination: strong UV exposure for most of the year, months of humidity, and dust that settles into any weak finish.

Cheap coating breaks down fastest under exactly these conditions. It starts as slight dullness, then turns into visible chalking — a powdery residue you can wipe off with your finger, a sure sign the coating is breaking down — and eventually uneven patches near hinges and handles.

Which Powder Coating Is Best for Aluminium Doors and Windows?

Here’s the simplest way to judge coating quality without getting technical: ask whose powder is being used.

Just like cement or paint, powder coating has established global brands with decades of proven performance — and it has nameless local products sold purely on price.

At Ostenta, we use only AkzoNobel, Jotun, or equivalent imported premium-grade coatings on our aluminium doors and windows. These are the same coating brands trusted on landmark buildings and premium facades around the world, tested to hold their colour and finish through years of harsh sun, humidity, and rain.

Most local fabricators don’t use these brands, because premium coating costs noticeably more than the basic alternative. That saving looks small on your quotation. It shows up later — on your windows and doors.

This is exactly why Ostenta doesn’t compromise on the coating, even though it costs more upfront. Beautiful aluminium doors and windows that turn dull in 3 years defeat the entire purpose of choosing premium aluminium in the first place.

3 Questions to Ask Before Buying Aluminium Windows or Doors

Whether you go with Ostenta or anyone else, ask your fabricator these three things:

1. Which brand of powder coating are they using? A recognised name like AkzoNobel or Jotun — or something unbranded?
2. Is there a test certificate for the coating’s durability?
3. Do they offer a written warranty on the coating itself — not just the hardware or installation?

A fabricator confident in their materials will answer all three without hesitation. One who can’t is quietly cutting a corner you’ll only discover a few years later.

The Real Cost of Cheap Powder Coating

Aluminium windows and doors with weak coating don’t just look bad. They usually mean repainting or refinishing costs down the line, reduced resale value if you ever sell the property, and a home that looks older than it actually is.

Good powder coating isn’t a luxury add-on. It’s the difference between aluminium doors and windows that are a 20-year investment — and ones that are a 3-year disappointment wearing the same price tag.

Frequently Asked Questions

1. Why do aluminium windows fade or turn dull?The aluminium doesn’t fade — the powder coating on it does. Low-grade coating breaks down under UV, humidity, and dust, causing dullness, chalking, and patchy colour within 2–3 years.
2. How long should powder coating on aluminium windows last? Premium coatings from brands like AkzoNobel and Jotun are built to hold colour and finish for 15–20 years, even in harsh Indian weather. Cheap local coating can start fading in as little as 2–3 years.
3. What is chalking on aluminium windows? Chalking is a white, powdery residue you can wipe off the frame with your finger. It’s a clear sign the powder coating is degrading.
4. Can faded aluminium windows be repainted? Refinishing installed frames is possible but costly and rarely matches a factory finish. Choosing premium coating upfront is far more economical.

Looking for aluminium doors and windows finished with AkzoNobel, Jotun, or imported premium-grade coatings built for Indian weather? Get in touch with Ostenta for a free consultation.