Hope this is the best place to post this -

I have a bungalow, with PVC windows, good attic insulation and cavity wall insulation!

When we get cold weather, what ever room that is slept in we get condensation on the windows!

I have tried those absorption trays. but they don't really work that well!

Is there anything i can do to stop this or is it just a fact of life?

Thanks

If you seal up your house to reduce draughts the water vapor produced by breathing, cooking, washing, showering etc can't get out so it builds up. The air can only hold a certain amount of water before it condenses out somewhere - typically on the coldest surfaces like windows. You can try and eliminate all cold surfaces but that just delays the problem or moves it somewhere else.  

You could use a dehumidirier that extracts the water from the air but they typically need regular emptying by hand and have running coats.

The real answer is to provide ventilation that allows the wet air out and dry air in.  Ventilation is frequently provided by trickle vents in the frames of windows. Check yours aren't blocked or closed. If they aren't sufficient try adding bathroom and kitchen extractor fans and use them. Ideally hook them up to the lights so they are on when the room is in use. They blow damp air outside and fresh air enters through your trickle vents or other openings. This is somewhat inefficient in the winter because you have paid to heat the air that you are blowing outside.

In my view the only "perfect" solution is to install a "Heat recovery Ventilation systems". They work by extracting damp air from the kitchen and bathroom using ducts in the roof space.  The damp air goes through a heat exchanger which extracts/recovers the heat and uses it to warm up the incoming fresh air. The warmed  freshair is then fed into dry rooms like the bedrooms and living room by another set of ducts.

It's possible to DIY install these systems and you can see several suppliers at most of the selfbuild shows.

http://www.villavent.co.uk/heat-recovery-ventilators.htm

http://www.rega-uk.com/

http://www.feta.co.uk/rva/

A cheaper solution might be to open the window at night?

Maybe fit a lockable stay or a restrictor like this http://www.screwfix.com/app/sfd/cat/pro.jsp?cId=100635&ts=08975&id=23507...

if you are concerned over security.

this adds nothing of help, lol, but I think i read somewhere you breathe out a litre of moisture(water?) a night while sleeping.

dehumidifier is my suggestion, or towel on the sill.

btk

That last one says..

Moisture removal at 30C, 70% R.H. L/day: 8.5 l
Removes up to 12 litres/day (QT120)
3.3 litre water tank

So you could have to empty it between two and four times a day?

The noise is a concern especially at night!

I would only really have this on during this time anyway, as it's fine in the day!

There a few on ebay also, EBAC make, any good?

id say a humidity operated extractor fan is best

ss

Ok, the dehumidifier arrived today got it set up, but the instructions are very vague!

It has a humidistat! does this mean that when i set the conditions, it will only come on when the moisture raises above that level? and stop when it'd done it's job?

As it did work for about 10 minutes, now it has shut off on the setting i have it at, if i knock it up a knotch it will run again!

Thanks in advance, merry xmas!

Thanks, get i now!

Just got to trial and error now, untill i find the right setting

Thanks all for all the help and advice, most appreciated!

Happy Xmas and have a cyber pint on me