My neighbour just replaced his conservatory roof with this roofing. He’s a tradesman so did it himself he said it was expensive but so far so good no leaking but I have noticed it’s bubbled in a few places but that might be his fault. I’m assuming there are companies who specialise.
We had our garage and an extension roof done in EPDM, in 2012. So far, so good, and we were very pleased with what they did. The chaps doing it were also replaced all our guttering, fascias and soffits. The total bill was just over £4000 for all the work.
(One of them came back later in the year and replaced our shed roof.)