I have a concrete flat roof over the downstairs loo. Its been letting in water and there are several cracks in the concrete which I can see having removed the cladding from the loo ceiling. Water's obviously getting under the felt outside, the source of which I am still searching for. However, I'd already decided that I hate the look of the roof, so was planning to construct a pitched slated roof canopy to shroud it, hence killing two issues at once.
The loo has always been very chilly, and I guess the concrete is acting as a large cold bridge to the outside world. The issue I have is that the ceiling (the bare concrete) in the loo is quite low, so adding insulation within would be an issue. So, could I rip off the felt on the outside, insulate from above then build my canopy over the whole lot? If so, what's the best material to use? Do I need to rip off the felt (not that that's a great issue)?
Pics attached for reference but not adding much.
The loo has always been very chilly, and I guess the concrete is acting as a large cold bridge to the outside world. The issue I have is that the ceiling (the bare concrete) in the loo is quite low, so adding insulation within would be an issue. So, could I rip off the felt on the outside, insulate from above then build my canopy over the whole lot? If so, what's the best material to use? Do I need to rip off the felt (not that that's a great issue)?
Pics attached for reference but not adding much.