Browse Forums Owner Builder Forum 1 Jun 06, 2012 11:32 am Is it possible to lay new clipped zincalume sheets over the top of an existing corrugated iron roof? to save on having to remove the old sheets and dealing with the extra waste? The roof itself is a 4 degree pitched flat roof, nothing tricky. cheers, BEN Re: Roofing over the top of an old roof 2Jun 06, 2012 10:47 pm Hi Ben, I wouldn't recommend it unless your prepared to batten over the top of the existing roof, and then you have a whole new set of issues. Laying 1 sheet over the top of another has the potential to create a vacuum that will suck in water and accelerate the deterioration of the protective coating which will most likely lead to rusting. You will undoubtedly get a better job if you remove the old sheets first. The right roofing contractor can arrange for removal of the old sheets for you but if you consider the metal can be scrapped its could be worth doing it yourself. Hope this helps. Brett Site Cut 17.02.12 Slab poured 29.03.12 Frame up 23.04.12 Roof on 10.05.12 Lock up 18.07.12 Moved in 26.10.12 252 days or 36 weeks to complete. Re: Roofing over the top of an old roof 3Jun 07, 2012 6:14 am Remove old sheets, they can also be resold for form work Landscape Design & Construction http://cherub.squarespace.com/ Hi, I'm clearing the tiles from our horrid 50 year old bathroom and preparing to lay new ones. Bugger of a job getting the old… 0 8076 Your house roof does not show rusting other than some surface rust on the flashings. In my opinion you dont need to replace or paint the roof other than treat surface rust… 1 10105 Cheers. The painted render is a bit chalky to the touch. To prepare the surface for best adhesion, what would you recommend? Also, given that there must be some… 6 8475 |