Browse Forums DIY, Home Maintenance & Repair 1 Dec 29, 2011 10:17 pm Hi All, we have an old extension with rusty corrugated roof, so would like to remove all the rust before repainting. the roof is about 140sqm, so manual removal isn't really an option. so is there any tools out there to use? I was thinking to get an angle grinder or a die grinder but not sure which will suit better to quickly remove rust. or is there any other easy way to do this job? please advise. Regards Re: rust removal for corrugated roof help 2Dec 29, 2011 11:55 pm Seriously, to do it properly you would be better replacing the sheets. They are .55mm thick, there just isn't enough body to the sheets to manually remove the rust, and the paint will probably peel anyway. If you replace them you can pick a colourbond colour which will last for ages. You can't even use deoxidine acid (rust converter), as it attacks zinc. Re: rust removal for corrugated roof help 3Dec 30, 2011 10:17 am Thanks ChargerWA, we were thinking about colourbond, but because the future of this house is unknown(possibly rebuild in afew years), hence looking for a cheap short term workaround for the next 3-5 years. so how long do you think the roof will last before completed damaged by the rust? I tried sanding it manually yesterday, looks like the rust is half way through the sheet in some area. Cheers Re: rust removal for corrugated roof help 4Dec 30, 2011 12:28 pm Without pics it's hard to tell. If you are going to redo it in the next 5 years just ride your luck and if it rusts right through you can always silicone it up as a temp fix. If you can do the labour yourself you might be surprised how cheap colourbond is. 140m2 worth of colourbond sheets would cost you about $2300 and then you should allow another $2000 for new screws, flashings, ridge cappings etc. Re: rust removal for corrugated roof help 5Dec 30, 2011 9:04 pm I went to big B******* today and they recommend not to sand the rust as this will thin the roof and damage it quicker, instead they recommend rust converter then metal primer and after that apply roof paint. sound to me very very labour intensive. I guess I will have to ride my luck for now. have also spoken to another tools guy and he reckon to leave it as is. because he had a similar problem to his roof 10 years ago and it's still ok today. Cheers 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 7 8763 Is it possible to render an old corrugated iron shed.I have heard that it can be done if it is covered with chicken wire first.Not sure of the ratio of the render mix and… 0 4896 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 |