On Sun, 22 Jul 2007 05:17:49 -0700,


For the built-in cupboards, take the polystyrene off (fire
hazard)

Polystyrene wall tiles in a cupboard are not a significant fire
hazard, replacing them will achieve little.

Im not a great DIY'er...are these Celotex boards easy to fit?

Yes - but it isn't addressing the real problem so I wouldn't bother
with it.

You might find that the extractor fans are not necessary if
you do just these things.

Im surpised at this as nearly everyone Ive spoken to (builders,
plumbers etc) and a lot of people on the groups have said no.1
priority should be extractors to aid air movement and to retain warmth
(dew point etc)

The priority should be on ventilation not just extraction. Extractor
fans only work if there is fresh air coming from somewhere and in a
totally double glazed house with possibly blocked chimneys it isn't
easy to control where the air comes in. Opening windows isn't really
suitable as a long term solution as it increases noise and draughts.

It doesn't take the brains of a dried prune to recognise (as you
already have) that the way you are living is putting gallons of water
a day into the house. If you don't get rid of that water vapour the
problem will always remain - it will just move around a bit.

Extractor fans are better than nothing if carefully planned and
installed, but they would need to be running non-stop in your
situation. It may be more appropriate to look at a whole house
ventilation system with the amount of water you are evaporating.

Have a look at
http://www.feta.co.uk/rva/
http://www.villavent.co.uk/domestic-...on-systems.htm
http://www.bsee.co.uk/news/fullstory...R EMENTS.html

In the short term a couple of dehumidifiers, one upstairs and one
down would certainly help a lot.
--
Peter Parry.
http://www.wpp.ltd.uk/