Roof iron

Hi folks, how do I tell that I have zincalume or custom orb roof sheeting?

Silver colour.

I need to remove some clear sheets and replace them with whats already there and want to keep them compatable.

Cheers.

Custom Orb is just a fancy name for corrugated iron sheeting.

Zincalume is the protective coating applied to iron/steel sheets (flat and/or profiled ie Custom Orb).

So if you have corrugated roof sheeting that has a silver appearance then its very likely to be zincalumed Custom Orb.

Zincalume has a much finer appearance than galvanised which tends to look splotchy

Thanks Bob & Rod -thats what I thought - gal has that "crystal" look. I must have zincalume as its very uniform.

Yes you are right zincalume doesnt really have a texture to it, but galvanised does, it has "spangles" in its appearance "shapes" of approx 5-10mm. Dont mix the 2 as galv is purley zinc and zincalume is zinc/Aluminium and you will get corrosion if you mix this 2 as they are differential metals.