Recent rain has shown my flat roof is leaking. It's part of a conversion built about 30 years ago. Very nicely built - the correct lie etc and marine ply decking, and lead flashing. Think it is three layer. Size approx 5x5 metres.
Any of the modern alternatives better? Membrane or fibreglass? And a rough idea of relative costs would be nice too.
Access is easy, but it's never walked on etc except for any maintenance.