Al Reynolds wrote:

While thinking idly about extending my house,
I happened on the idea of having a patio on the
flat roof of my extension. Only problem is, all
the flat roofs I have ever seen in the UK have
that felt and membrane option where you either
(a) can't walk on it, or (b) wouldn't want to walk
on it even if you could.

Not a helpful answer I know, but the neighbours opposite have an asphalt
(over wood) roof and have a garden shed up there and regularly hold
barbecues on the roof!
Not sure what the insurance would say about it

Lee
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