Dave Plowman (News) typed:

In article ,
Al Reynolds wrote:
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.

I had mine constructed on the top of the addition of a Victorian semi
- it was originally a pitched tiled roof.

My architect recommended a ply base with asphalt then promenade tiles
on top of this - they are lightweight glass fibre reinforced concrete
and very very strong.


Yep I also have promenade tiles on a flat roof that is sometimes used as a
sitting area.
They're almost 20 years old now, outlived most other felt only flat roofs
that I unfortunately own.

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mark