Window color RaL 9005 and garage

If you are unlucky, black anodized aluminum will then turn golden or copper-colored.

I searched for example images on the internet, these are now absolutely very extreme examples and certainly not necessarily a prime example, but just to have a picture of what I mean by uneven fading.




As I said, it’s extreme, but I’m concerned about clouds like that. The lower gate is probably DB703, powder coated and less than 10 years old :eek:.

If you’re unlucky, black anodized aluminum will turn golden or copper-colored.

Okay! So not an option either :confused:.

White is actually the least problematic. I also suspect that it becomes riskier the darker a color is. So a light silver or light gray could probably still last relatively long...

We have planned wood/aluminum windows, but RAL 9005 is indeed deep black, [...] I am almost sure that with appropriate sunlight exposure you could "cook" a fried egg on it, does a wood/aluminum window endure that in the long run?

Yes, I still know the problems with DB703 from my old company, every powder manufacturer (for powder coating) looks completely different, when you place the sample pieces next to each other, you can hardly believe that it is all supposed to be DB703.

Does anyone know how this behaves with anodized aluminum?

A wood/aluminum window or PVC/aluminum window probably handles this better than a foil-coated PVC window. But in general, it means stress for a material if you coat it with a very dark (= strongly thermally variable) surface color. DB colors are essentially RAL colors (only from the palette of the major buyer Deutsche Bahn), and regarding RAL I have already said about a dozen times that RAL is not Pantone (legally speaking, it standardizes not the success but only the effort). From my experience with anodized aluminum I would speak of color stability – however, as a window manufacturer I never had any business relations with anodizing plants because at my time 0 percent of anodized surfaces were sold; even as a dealer I never dealt with it. Your mention of the fried egg, however, makes me marvel that I have never heard of Teflon coatings for building components ;-) I personally would, for garage doors either, as with roof tiles, always consciously choose a clearly intentionally only harmonizing but not identical color (so better immediately three RAL shades next to each other) or set a color accent (possibly matching that of the front door); so rather petrol instead of just bluish (or antenna yellow).

If you're unlucky, black anodized aluminum will then turn golden or copper-colored.

Sorry, my experience was assigned incorrectly here, that happened with powder coating. Anodizing should indeed last longer...

The problem with deep black is that any change to the surface causes light to be reflected, and then it no longer looks deep black. And outdoors, all surfaces change, and the darker they are, the faster this happens. There are reasons why black colors were very rare outdoors. In England and the Netherlands, historic houses have black high-gloss paints on doors and windows. These are mostly oil paints, but they are refreshed every few years with varnish.