bathroom condensation .....loads of it

[b21playa]

Hi all

In the bathroom of our house we seem to get a lot of condensation. Its that had on the window header we have alot of water droplets accumalated as well as the ceiling nearest to the window.

The extractor is always on and has overun set as well as humidity sensor.

The bathrrom is a ground floor extension done about 15years ago (cavity wall), so has timber window which is single glazed.

Now I want to change the window to a upvc one which should help keep heat in and in overall appearance. I dont know if it has insulation in the cavity ??

What else could be causing all these droplets?

Thanks

 

[Softus]

The extractor is always on and has overun set as well as humidity sensor.

Where is your dry air coming from?

 

[b21playa]

The extractor is always on and has overun set as well as humidity sensor.

Where is your dry air coming from?

open window when possible, hard in this cold

 

[stuart45]

When running a bath does your family run the cold water in first, or do you have mixer taps? This can help keep down condensation.

 

[b21playa]

When running a bath does your family run the cold water in first, or do you have mixer taps? This can help keep down condensation.

most likely hot first

 

[JohnD]

has it always been like that, or has it got worse?

Try turning on the extractor when you go to bed, and letting it run all night. In the morning the bathroom should be bone dry.

A few possibilities:

There might be wet towels or washing adding to the moisture load after the fan has gone off

there might be a water leak under the floor or somewhere causing extra moisture even when you are not showering

the fan or duct might be clogged with dust and cobwebs

Stand outside while it is running, if someone is showering and it is a cold day you should see steam gushing out of the fan outlet

If the fan is working, you should not open the window as this will interfere with airflow sucking through the room. there ought to be enough gap under the bathroom door for you to feel fresh air being drawn in when the fan is running.

There should not be condensation on the ceiling iof it is insulated. However there might be a roof leak there.

A single-glazed bathroom window is bound to get condensation on it in winter, even if you have an extractor.

 

[noseall]

it is a 'cold bridge' due to either lack of insulation or a solid cast-in-situ lintel.

 

[JohnD]

damn, good point.

Would you insulate the inside then?

 

[noseall]

damn, good point.

Would you insulate the inside then?

if space will allow - why not.

anything to relieve the surface of its inherent coldness.

 

[b21playa]

damn, good point.

Would you insulate the inside then?

if space will allow - why not.

anything to relieve the surface of its inherent coldness.

are you on about cavity insulation?