Hi, I have an outbuilding with a concrete roof that's leaking. The original roof is bitumen I think. Looking at patching it - none too fussed about appearance as long as it waterproofs it. What's the best/cheapest option here? I've been looking at using standard roofing felt over a brushed on bitumen paste. Or a rubber sheet - not sure how these are fixed. Since starting looking I've noticed there's felt you apply with a torch. Others that go down on hot bitumen. Underlays, membranes. I'm a bit lost lol. Is standard (shed) roofing felt completely wrong here?
If you're interested in patching and you can see where the problem areas are, I'd go for a can of Evercryl and slap that on. If its widespread and just an outbuilding, a torch on felt would be my next thought.
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