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Condensation and damp
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By (user no longer on site) OP
over a year ago
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I’ve got condensation on my windows in the mornings, at this time of year do you think it’s better to open the windows or leave them closed with a dehumidifier going, I’ve Googled this but nothings very clear, if you have the same problem what do you do ?!
This is the only serious thread I will ever do, normal service will be resumed. |
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We try and have the windows open 30 mins a day for this reason. Obviously as it gets cooler this isn't possible so we remove as much condensation as possible with one of those hoovery, sucking up gadgets, open bedroom windows and run the dehumidifier elsewhere. |
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By (user no longer on site)
over a year ago
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Leave a window or afew windows on the latch. Do you have your heating off and on (that causes it together with poor ventilation) have it at a constant steady heat on a thermostat and leave your windows on the latch during the day  |
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By (user no longer on site) OP
over a year ago
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"Also we don't dry washing indoors and always run the extractor hood in the kitchen when cooking.
Condensation is a pain in the bum. "
I know when it gets closer to winter you’re just letting damp air in by opening the windows, but wasn’t sure with it being the start of autumn |
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By (user no longer on site) OP
over a year ago
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"Leave a window or afew windows on the latch. Do you have your heating off and on (that causes it together with poor ventilation) have it at a constant steady heat on a thermostat and leave your windows on the latch during the day "
Yeah, I have it off all day, the heating that is, just have it on in the evenings |
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Ventilation is the key to cure condensation, modern levels of insulation trap moisture into the building and the only way to clear effectively is ventilation, wherever you get a ‘cold bridge’ this will show as condensation better on the windows than in the fabric of the building which can cause real and very expensive damage.
Get the trickle vents open on the windows, or open a bit.
As an aside just bare in mind that Covid guidance is that dry environments assist the spread of the disease so an increased relative humidity isn’t a bad thing at the moment, I’d avoid the dehumidifier option. |
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"Also we don't dry washing indoors and always run the extractor hood in the kitchen when cooking.
Condensation is a pain in the bum.
I know when it gets closer to winter you’re just letting damp air in by opening the windows, but wasn’t sure with it being the start of autumn "
We've noticed that at this time of year windows open mid morning helps. Past about 2pm it doesn't.
We've found that breathing is a major cause but haven't found a way to stop that yet... apart from the obvious  |
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My bathroom & kitchen windows are slightly open all year round, as well as my bedroom window 99% of the time. In addition, in the bathroom and bedroom I have moisture absorbers. These combinations seem to keep us condensation free |
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By (user no longer on site) OP
over a year ago
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"Not criticising the cleanliness of your home, but condensation forms more readily on dirty windows, so might be worth cleaning the inside windows."
Cleaning sounds like a drastic measure |
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By (user no longer on site)
over a year ago
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"Leave a window or afew windows on the latch. Do you have your heating off and on (that causes it together with poor ventilation) have it at a constant steady heat on a thermostat and leave your windows on the latch during the day
Yeah, I have it off all day, the heating that is, just have it on in the evenings "
That will more than likely be the issue also costs more to run heating like that if you set it at a moderate temp (i have mine at 21°c) your home stays warm and dry. Also leave a window slightly ajar upstairs. It should stop doing it within a week.
Yoyo'ing you homes temperature causes condensation issues. |
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"My bathroom & kitchen windows are slightly open all year round, as well as my bedroom window 99% of the time. In addition, in the bathroom and bedroom I have moisture absorbers. These combinations seem to keep us condensation free "
you can get two speed fans for bathrooms that run at a low level continuously but if you put the light on or the humidity rises they will run at normal speed.
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By (user no longer on site) OP
over a year ago
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"Leave a window or afew windows on the latch. Do you have your heating off and on (that causes it together with poor ventilation) have it at a constant steady heat on a thermostat and leave your windows on the latch during the day
Yeah, I have it off all day, the heating that is, just have it on in the evenings
That will more than likely be the issue also costs more to run heating like that if you set it at a moderate temp (i have mine at 21°c) your home stays warm and dry. Also leave a window slightly ajar upstairs. It should stop doing it within a week.
Yoyo'ing you homes temperature causes condensation issues. "
It’s the joys of living in a cottage |
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"Not criticising the cleanliness of your home, but condensation forms more readily on dirty windows, so might be worth cleaning the inside windows.
Cleaning sounds like a drastic measure "
I'm sure you'd suit a pair of marigolds 
You could always try a sample, one window, and compare results? |
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I live in a big, old building with really thick walls and while I'm grateful for tge double glazing gor the warmth, it has made the condensation problems worse. We have an electric dehumidifier in the bedroom and the disposable ones in the bottom of the wardrobe. The edge of wardrobe is also pulled about a foot away from the external wall as that wall seems to have the worst problems as it nearly never gets any sun either. We found that sleeping with the bedroom door open has helped. We also leave the bathroom window wide open and close the door for as long as possible after showering and leave the bathroom extractor fan on for most of the day. |
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By (user no longer on site)
over a year ago
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It depends how much you care about the property. If it's your house then invest in some extractor fans and get windows with trickle vents, and bump up the heating (don't scrimp, it's not worth the energy saving!).
If it's a rental just bosh some passive dehumidifiers in the windows and replace them every time they fill up with water. Stops the mould. |
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"I've found leaving the windows open for a little bit better than a dehumidifier. Especially if it's a bit windy outside. "
Same, I've got huge bay windows in the lounge, used to be like Niagara Falls in the morning.
Now I leave one window open a crack and it's nowhere near as bad. |
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By (user no longer on site)
over a year ago
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If it’s your property as well as opening windows first thing and wiping away the condensation I recommend installing some vents in the actual walls. Allows a small amount of constant ventilation - the ones that can be closed help to stop draughts if windy. |
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"My bathroom & kitchen windows are slightly open all year round, as well as my bedroom window 99% of the time. In addition, in the bathroom and bedroom I have moisture absorbers. These combinations seem to keep us condensation free you can get two speed fans for bathrooms that run at a low level continuously but if you put the light on or the humidity rises they will run at normal speed. "
Thanks but I’m quite happy with the natural air flow |
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Condensation can be attributed to various factors.
In a modern well maintained house with cavity walls and double glazing, that moisture is produced inside by humans, pets, washing and drying of any type, poor ventilation.
All other houses can have the same problem plus; if the walls are solid moisture is drawn inside by evaporation from the inside. This is exasperated by heating and dehumidifiers.
Building faults: houses built without cavity insulation and added later can suffer damp because the cavity filling is faulty and bridges the original air gap allowing moisture to go through the walls. Leaking gutters cause damp inside. Excessively porous external bricks or other materials including the later addition of render and stone work contribute to damp inside.
Early signs of failed damp proof course cause damp. Broken roof tiles/slate cause damp.
I've probably missed something that causes damp. The main cause of condensation in a bedroom is excessive physical exertion during sex. The answer to that is to adopt a more relaxed and refined method of sex where you can have plenty of satisfaction without all the physical activity, that's what I like to do. |
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"Condensation can be attributed to various factors.
In a modern well maintained house with cavity walls and double glazing, that moisture is produced inside by humans, pets, washing and drying of any type, poor ventilation.
All other houses can have the same problem plus; if the walls are solid moisture is drawn inside by evaporation from the inside. This is exasperated by heating and dehumidifiers.
Building faults: houses built without cavity insulation and added later can suffer damp because the cavity filling is faulty and bridges the original air gap allowing moisture to go through the walls. Leaking gutters cause damp inside. Excessively porous external bricks or other materials including the later addition of render and stone work contribute to damp inside.
Early signs of failed damp proof course cause damp. Broken roof tiles/slate cause damp.
I've probably missed something that causes damp. The main cause of condensation in a bedroom is excessive physical exertion during sex. The answer to that is to adopt a more relaxed and refined method of sex where you can have plenty of satisfaction without all the physical activity, that's what I like to do."
Very comprehensive   |
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By (user no longer on site)
over a year ago
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"Leave a window or afew windows on the latch. Do you have your heating off and on (that causes it together with poor ventilation) have it at a constant steady heat on a thermostat and leave your windows on the latch during the day
Yeah, I have it off all day, the heating that is, just have it on in the evenings
That will more than likely be the issue also costs more to run heating like that if you set it at a moderate temp (i have mine at 21°c) your home stays warm and dry. Also leave a window slightly ajar upstairs. It should stop doing it within a week.
Yoyo'ing you homes temperature causes condensation issues.
It’s the joys of living in a cottage "
Cottage dweller here too, can't have heating at the flick of a switch, gotta chop and lug wood about. |
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By (user no longer on site)
over a year ago
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"I have upstairs windows open every day, run the dehumidifier every night and it still collects nearly 2 litres of water each night! 
Blimey! Do you live under the sea?
"
Haha sounds like it!  |
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By *essie.Woman
over a year ago
Serendipity |
Open the window a little, it will help with condensation. Don’t dry clothes on the radiators.
Close the bathroom door after a shower or bath, as the steam looks for the coldest part of the house. And don’t turn off the extractor fan which loads of people do. |
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By (user no longer on site)
over a year ago
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My windows are awful now it's getting colder 
I dry them every morning and open them all for a bit.
The heating set on a thermostat works best - mine's now set at 20.
Turning the heating on and off costs more money than leaving it on a thermostat.
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By (user no longer on site)
over a year ago
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"Condensation can be attributed to various factors.
In a modern well maintained house with cavity walls and double glazing, that moisture is produced inside by humans, pets, washing and drying of any type, poor ventilation.
All other houses can have the same problem plus; if the walls are solid moisture is drawn inside by evaporation from the inside. This is exasperated by heating and dehumidifiers.
Building faults: houses built without cavity insulation and added later can suffer damp because the cavity filling is faulty and bridges the original air gap allowing moisture to go through the walls. Leaking gutters cause damp inside. Excessively porous external bricks or other materials including the later addition of render and stone work contribute to damp inside.
Early signs of failed damp proof course cause damp. Broken roof tiles/slate cause damp.
I've probably missed something that causes damp. The main cause of condensation in a bedroom is excessive physical exertion during sex. The answer to that is to adopt a more relaxed and refined method of sex where you can have plenty of satisfaction without all the physical activity, that's what I like to do."
That last tip wouldn’t suit me Lol. I have tenants that I issue with written condensation advice when they start renting, I can just imagine the looks I’d get if I added the sex one |
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