Mark wrote:
On Wed, 02 Mar 2005 14:29:23 +0000, Mark
wrote:

Thanks for the advice. I'm still not sure how to join sections of
ducting together. The 100mm flexible ducting I have won't fit on the
adapter that I have.

Have you got a matching ducting/adaptor pair? It should be a pretty
tight fit - you need to 'screw' the flexible ducting over the end of the
adaptor or ducting before you use a jubilee clip to hold it in place.

Also - what should be used to duct through the cavity wall to the
outside?

Neatest solution is to fit a length of solid ducting through a round
hole in the wall; it should be flush with the outside surface of the
wall when you're done. It wants to slope slightly towards the outside
to encourage condensation to flow out rather than in. You then fill in
any space around the ducting with mortar to make a sealed, firm, neat
job. Next day you can fit a grille to the wall outside; this will have
a male 100mm diameter bit which will fit snugly into the ducting you've
fitted (but you still fix it firmly in place with screws.

On the inside wall, I usually just let the ducting protrude by an inch
or two, and fit the flexible ducting over the end of that (it's usually
all hidden by boxing anyway).

David