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Aluminum Roof Coating

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November 8, 2023 at 1:45 p.m.

alextolle

Patrick in FL asked:

Can aluminum roof coating be applied to a rusty metal roof? If so, fibered or non fibered? Any special prep?

November 8, 2023 at 1:46 p.m.

alextolle

This is what John Kenney of Cotney Consulting Group had to say in response to your question:

Hi Patrick,

You must prepare the roof by power washing to remove loose or surface rust flakes. You may have to wirebrush any extremely rough areas. Once prepped, it should be primed as recommended by the coating manufacturer you choose.

As a basic rule of thumb, fibered coatings are used when strength and resistance against tears and abrasions are the main focus, and non-fibered coatings work best for applications that require greater flexibility and the ability to stretch the material farther over a surface area. Non-fibered may suit your situation the best since your coating over primed metal.