I have a bitumen flat roof, which I use as a roof terrace.
Would appreciate advice on how I could make it suitable for placing furniture, etc. on it as, presently, everything seems to sink into it in the hot weather.
Take note of Brian he's right in all he says.
A neighbour to where I used to live in West London had a small narrow balcony put on their loft extension bedroom and the timbers were biggies about 7" x 3" and closer together than normal and had steel balcony railings they would not allow timber ones, they were b...y heavy I helped to put them up on to the balcony.
bb
January 2011
in a few months you'll be asking how do i stop the rain coming through my flat roof. Unless the roof has been designed and built to be used as a terrace you cannot only damage the roof you will probably damage yourself when you fall through. If it's a standard flat roof you'll need planning permission, safety rails, strengthening joists, recovering etc. etc.
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Try fixfault.com to fix roofing.