Excess condensation - trickle vent?



Hi all

I'm still having trouble with condensation on the insides of the outside window panes, which are secondary glazed, but am loathe to just drill holes as was suggested. I have now come across trickle vents, which seem to be a good idea and I am now hoping for a bit more advice / support.

1. I have wooden window frames which are large (6'x2' approx) and 5 of these in one bay, and another pair along the wall.

2. If trickle vents are considered a reasonable option to help with excess condensation, how many would I need in each of my large windows?

3. Should they be fitted at the top, bottom or sides?

I am always grateful for any advice; thanks in anticipation!

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Thanks, though that wasn't what I wanted to hear! :(

I've read the page you suggested, and sadly it leaves me stumped. The only thing I can think of now is heating the room much more - but it will cost a lot, I fear. I dread to think what new windows (sealed units) would cost, in windows the size of these!

Oh well, 'twas ever thus .... :)
ventilate during the day after the heating is off
keep the door closed all the time
ventilate the bathroom after showers and baths
dont dry washing indoors
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When you say condensation on the inside of the outside window pane do you mean that it is single glazed with secondary glazing or is it a double glazed window?

If it is single glazed then ventilation will help; however I would recommend changing the glass for energy efficient glass as this will help to stop the condensation by keeping your home warmer and therefore meaning the glass will not drop below 2 degrees (condensation critical temperature).

Other than that I would install new double glazing with a good air gap, argon filled air gap and soft coat glazing.

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