I have taken down the metal roof on my outbuilding (old galvanized corrugated sheet metal) and plan to stretch out tarpaulin, sand off rust, and oil the metal before laying it with the weathered side down.
To my question: I found a package of Esse zinc-plated farm screws in the workshop. Do electroplated screws really work outdoors and on roofs? If not, why are farm screws made electroplated? They're used solely to seal against water leaks?!
P.S. the roof was previously nailed at the peaks, so it will now be screwed in the same holes, but since I'm flipping the sheets, the screws will be in the valleys.
To my question: I found a package of Esse zinc-plated farm screws in the workshop. Do electroplated screws really work outdoors and on roofs? If not, why are farm screws made electroplated? They're used solely to seal against water leaks?!
P.S. the roof was previously nailed at the peaks, so it will now be screwed in the same holes, but since I'm flipping the sheets, the screws will be in the valleys.
Picture of the screw box?
I saw now when I checked again earlier today that it says Stainless/Zinc-Plated. Even stranger, because you shouldn’t even mix zinc-plated and stainless, and I assume that either the screw or the cap is stainless, and vice versa zinc-plated… either way, it can't be used for the roof, since it is zinc-plated.
However, I found another option, which is only zinc-plated. It should be usable if you buy zinc paint and brush it on the heads (I don't want black or white heads on a gray (zinc-plated) roof.
However, I found another option, which is only zinc-plated. It should be usable if you buy zinc paint and brush it on the heads (I don't want black or white heads on a gray (zinc-plated) roof.