On 23 Jan, 10:01, David Hansen
wrote:
On Tue, 22 Jan 2008 12:16:58 -0800 (PST) someone who may be
" wrote this:-

We had a dormer extention done last year for a bathrom. I have just
had a fault with the ceiling extractor fan and have taken it out of
the ceiling and found that it just vents straight into the roof void,
there are vents in the soffets but I am sure this is not the way to do
it. How should it have been done. Should it vent via a pipe through
the flat roof, and if so how.

Roofs, especially flat roofs, should have as few holes in them as
possible. Zero is the ideal number, as there are then no holes
through which water will probably make its way eventually.

There are a number of ways it should have been done. One of them is
shown inhttp://www.ventaxia.co.uk/products/domestic/minivent.asp
but depending on your particular circumstances others may be better.

--
David Hansen, Edinburgh
I will *always* explain revoked encryption keys, unless RIP prevents me
http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54

My roof is a flat roof and the soffet overhang is about 3 inches wide,
not wide enough for the outlet grill, the extractor pipe is a bigger
diameter than the overhang. Thanks for the help