Browse Forums General Discussion Re: Rust roof screws 4Mar 18, 2024 7:32 pm The rust won’t spread to the roof sheets, spraying them will look patchy as the colorbond will already be faded. The rust is only cosmetic (to a point) I’d wait until enough have rusted to make replacement worthwhile and use either C4 or C5 screws. https://www.no1roofing.com.au/climaseal ... ng-screws/ If the battens are deteriorated then go up to 65mm screws, 50mm are the norm for corro , 65 for trimdek gives similar wood penetration. Re: Rust roof screws 5Mar 18, 2024 7:48 pm Pulse The rust won’t spread to the roof sheets, spraying them will look patchy as the colorbond will already be faded. The rust is only cosmetic (to a point) I’d wait until enough have rusted to make replacement worthwhile and use either C4 or C5 screws. https://www.no1roofing.com.au/climaseal ... ng-screws/ If the battens are deteriorated then go up to 65mm screws, 50mm are the norm for corro , 65 for trimdek gives similar wood penetration. thanks ,l have a photo below, only about 20% of the screws have any signs of rust the other 80% have no rust, l think my plan is to have the rusted screws painted with cold gal paint which will cost almost nothing and in a year l get a full replacement of all the screws on the roof, Do you think the cold gal paint should stop the rust for a year and it would be safe to wait a year to have them all replaced. Also someone mentioned becasue the new screws will be placed in the same hole as the old ones they might not have a tight grip , if that happens and the roof becomes lose does the company that installed the screws have to fix the problem at their own cost or would l have to pay Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Re: Rust roof screws 6Mar 19, 2024 5:15 am yep I think not urgent, screws not likely to come loose, hand tighten a few and you’ll get an idea of how good condition the batten is, I think the battens should be good still at 14 years. You could hsppilh leave it another 3-4 years, the cold gal is really not achieving much. Re: Rust roof screws 7Mar 19, 2024 12:01 pm Pulse yep I think not urgent, screws not likely to come loose, hand tighten a few and you’ll get an idea of how good condition the batten is, I think the battens should be good still at 14 years. You could hsppilh leave it another 3-4 years, the cold gal is really not achieving much. l spoke to my plumber we decided to replace the rusted screws and keep all the screws with no rust, it will only cost a few hundred Re: Rust roof screws 8Mar 19, 2024 12:01 pm Pulse yep I think not urgent, screws not likely to come loose, hand tighten a few and you’ll get an idea of how good condition the batten is, I think the battens should be good still at 14 years. You could hsppilh leave it another 3-4 years, the cold gal is really not achieving much. l spoke to my plumber we decided to replace the rusted screws and keep all the screws with no rust, it will only cost a few hundred Sam There is a much stronger glue than liquid nails. It's called T Rex and will stick your timber to the concrete. Cheers Simeon 1 1656 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 7126 |