Condensation on Bedroom Window

john_doe.

Hi

I have a problem in house, bedroom window keeps forming condensation.
there is a vent in the window which we keep open at night but still forms a lot of condensation at night and morning.
Reading about this problem the suggestions are the outside temp of the window is cold the inside window is warmer and breathing forms condensation once the moisture hits glass. One of the main causes is that the house is a sealed box however our house is not like that and quite drafty, i would say its quite cold at night time in the bedroom unless the heating is on. There is a radiator under the window.

Im trying to figure out how to fix the problem:
1./ vent the windows- there is already a vent in windows
2./ replace the windows - from what i heard this really isn't a fix either

anybody have any suggestions on this ?
photo attached of basic condensation, sometimes however there is water running down window

Thanks

vicwatson

No photo jd

vicwatson

Is the bedroom north facing by any chance?

punisher5112

john_doe. wrote: »

Hi

I have a problem in house, bedroom window keeps forming condensation.
there is a vent in the window which we keep open at night but still forms a lot of condensation at night and morning.
Reading about this problem the suggestions are the outside temp of the window is cold the inside window is warmer and breathing forms condensation once the moisture hits glass. One of the main causes is that the house is a sealed box however our house is not like that and quite drafty, i would say its quite cold at night time in the bedroom unless the heating is on. There is a radiator under the window.

Im trying to figure out how to fix the problem:
1./ vent the windows- there is already a vent in windows
2./ replace the windows - from what i heard this really isn't a fix either

anybody have any suggestions on this ?
photo attached of basic condensation, sometimes however there is water running down window

Thanks

Its down to ventilation throughout and how well the house is insulated.

There really should be ventilation in the walls and in each room.


You could use a dehumidifier as a temp fix.

john_doe.

vicwatson wrote: »

Is the bedroom north facing by any chance?

the front of the house gets the sun in the morning, the bedroom is in the shade until midday/evening and at back of the house

john_doe.

punisher5112 wrote: »

Its down to ventilation throughout and how well the house is insulated.

There really should be ventilation in the walls and in each room.


You could use a dehumidifier as a temp fix.

ya I've been thinking of getting a dehumidifier , does it need to be running in the actual room with issue though. The insulation in the house is definetly poor.
the room is quite airy

punisher5112

If you don't want the plug in type get the aero 360 it uses inserts you replace when used.

john_doe.

punisher5112 wrote: »

If you don't want the plug in type get the aero 360 it uses inserts you replace when used.

thanks ya have 3 of these already in the room they gather a lot of water but still window gets quite bad

punisher5112

It can also be caused by not having enough heat also.

john_doe.

punisher5112 wrote: »

It can also be caused by not having enough heat also.

that would be more like a cause i could understand as the room gets quite cold especially when heating is not on

MicktheMan

punisher5112 wrote: »

It can also be caused by not having enough heat also.

This ^^^^^^^^

If there is insufficient heating, then ventilation cannot work efficiently (in the sense that the air is too cold internally to take up the generated moisture, from breathing for example, to transport it to the outside).

If your house is draughty then it will be difficult to heat it appropriately without cost implications, so best advice is to cut down the draughts first, then improve the heating regime.

john_doe.

MicktheMan wrote: »

This ^^^^^^^^

If there is insufficient heating, then ventilation cannot work efficiently (in the sense that the air is too cold internally to take up the generated moisture, from breathing for example, to transport it to the outside).

If your house is draughty then it will be difficult to heat it appropriately without cost implications, so best advice is to cut down the draughts first, then improve the heating regime.

good man thanks that makes much more sense and matches what i see in the house, i was reading articles online which were all american oriented :roll eyes:
should have checked here first. I think i might concentrate my efforts on attic and cavity insulation as the house is quite freezing these winter months.

MicktheMan

john_doe. wrote: »

good man thanks that makes much more sense and matches what i see in the house, i was reading articles online which were all american oriented :roll eyes:
should have checked here first. I think i might concentrate my efforts on attic and cavity insulation as the house is quite freezing these winter months.

By all means improve the insulation; but remember that this will probably have very little positive impact on draughts. To tackle draughts, research air tightness.

Hotblack Desiato

You can regard condensation on the windows as a useful 'safety valve'.

I'd rather have that than condensation on a wall (especially behind furniture, etc) resulting in mould. The window pane is usually the coldest point in a room and so it's where condensation will happen, if it's going to happen I'd rather it there than elsewhere.

We used to put clothes on an airer in a north facing room, result - lots of condensation on that window and mould growth on the wall in a less ventilated corner. We moved the clothes airer to an upstairs south facing bedroom which is much warmer and it (along with a slight increase of heat on the TRV) solved the mould/condensation problem in the front room. Similarly we no longer put wet coats or boots in the cold north-facing hall, we dry them out in warmer rooms elsewhere first.