On 29 Dec, 01:29, "Doctor Drivel" wrote:
"Roger Mills" wrote in message

...

In an earlier contribution to this discussion,
benpost *wrote:

where i only own the ground floor...

so cavity wall insulation isn't really an option as upstairs dont seem
to have the problem as bad.

Well then just fill the cavity up to your ceiling level - if the people
above don't want their bit doing then sobeit.

They will not partially fill and water can move across the top of the
insulation.

I'm a bit late to this thread so forgive me if I repeat other advice.
Simple if expensive solutions are (1) De-humidifier and/or (2) Incease
the tempurature in the room. The de-humidifier will do the job on its
own but will work a bit better with a bit of heat. Increasing the
temperature in the room should heat up the cold surfaces on which the
humid air is condensing. I don't believe all the insulation in the
world will help unless you have some heat in the room first. We had a
bungalow once where the kitchen and living room faced south and the
bedrooms faced north. All the humid air migrated to the north of the
house, which it will tend to do naturally I believe. We tried a de-
humidifier in one of the rooms and boy did it collect water. Would
have needed one on each room so eventually scrooge (me) agreed to run
the radiators on this sided of the house for longer periods. Cured the
problem.

While ventilation will help it can make the rooms very cold. It is
best to vent at the source of the humid air, usually the kitchen and
bathrooms though you may have an indoor pool I suppose, which can give
real problems with condensations.

Paul Mc Cann