Problems with Galvalume for roofing?

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posted 11 years ago

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I'm getting conflicting info about whether to use galvanized metal or Galvalume for roofing with rain catchment in mind. A very experienced permie friend tells me that Galvalume will eventually start leaching out aluminum and zinc. Zinc - good, aluminum - bad. I checked online and found that Galvalume coating is 55% aluminum and zinc. But then, I went to Brad Lancaster's website and he recommends it in his roofing section. Any thoughts?

S Bengi

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Location: Massachusetts, Zone:6/7 AHS:4 GDD:3000 Rainfall:48in even Soil:SandyLoam pH6 Flat

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posted 11 years ago

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There is no good roof catchment material. Its just that Galvalume is least bad.

Iterations are fine, we don't have to be perfect
My 2nd Location:Florida HardinessZone:10 AHS:10 GDD:8500 Rainfall:2in/mth winter, 8in/mth summer, Soil:Sand pH8 Flat

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