Browse Forums General Discussion 1 Oct 26, 2021 6:55 am Re: Rust colour stain on plaster walls 3Oct 28, 2021 7:54 pm Whenever steel and other metals containing iron are regularly exposed to oxygen and moisture, they form rust. You’re on the right track, wire brush in a grinder then a zinc rich epoxy primer then a top coat of some sort, like a waterproofing membrane. Raising the concrete would… 1 7032 Very common on rendered homes Smaller suppliers get the lower quality raw materials 6 11862 THanks , l got a licensed building inspector to look at the rust, he said its just surface rust and it would take many years to become a problem because the beams are so… 22 28052 |