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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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condensation on new double glazed windows...
We got new upvc double glazed windows fitted to the front of our house this
week. My wife is convinced that all our condensations problems on windows would disappear (we had pretty bad condensation on the old single pane sash windows) However this morning we noticed that the windows in our bedroom were a bit (not enough to need wiped down) steamed up (say bottom 15-20% of each pane) There was no condensation on any other of the new windows but there was a bit on each pane in our bedroom (6 panes). Is this just due to the moisture from our breath during the night? Is it fair to expect zero condensation on the windows, should we contact the DG company.. I did google a bit on this but most posts referred to moisture condensation between the panes which is not what we are experiencing. --dkh |
#2
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condensation on new double glazed windows...
On Sat, 08 Oct 2005 10:19:55 GMT, dkh wrote:
We got new upvc double glazed windows fitted to the front of our house this week. My wife is convinced that all our condensations problems on windows would disappear (we had pretty bad condensation on the old single pane sash windows) However this morning we noticed that the windows in our bedroom were a bit (not enough to need wiped down) steamed up (say bottom 15-20% of each pane) There was no condensation on any other of the new windows but there was a bit on each pane in our bedroom (6 panes). Is this just due to the moisture from our breath during the night? Is it fair to expect zero condensation on the windows, should we contact the DG company.. I did google a bit on this but most posts referred to moisture condensation between the panes which is not what we are experiencing. Some condensation on DG is to be expected. To eliminate it completely, you would need better insulation around the frame (it's conduction through that which leads to the glass getting cold enough for moist air to condense out). I think some makes are better than others in this respect. I've also had a couple of DG windows fitted this summer. On the first cold night, I was alarmed to see condensation along the bottom of each panel, which wasn't on the inside. I was pondering the likelihood of both units having failed so soon, when it occurred to me to open a window and stick my hand out. The moisture was on the outside (as it often is on your car windows). The DG unit was obviously allowing the outer pane to get very cold. -- Honk if you've slept with Commander Riker! |
#3
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condensation on new double glazed windows...
"dkh" wrote in message ... We got new upvc double glazed windows fitted to the front of our house this week. My wife is convinced that all our condensations problems on windows would disappear (we had pretty bad condensation on the old single pane sash windows) However this morning we noticed that the windows in our bedroom were a bit (not enough to need wiped down) steamed up (say bottom 15-20% of each pane) There was no condensation on any other of the new windows but there was a bit on each pane in our bedroom (6 panes). Is this just due to the moisture from our breath during the night? Is it fair to expect zero condensation on the windows, should we contact the DG company.. I did google a bit on this but most posts referred to moisture condensation between the panes which is not what we are experiencing. Condensation forms, of course, when damp humid air comes into contact with a cold surface. If the inner pane of your double glazing is cold, and humid air contacts it, then you will get condensation. The condensation will be exacerbated by lack of ventilation. So a few questions to ask: Why is the inner pane cold, where is the damp air coming from, and is there any ventilation in your bedroom (eg an open window)? If your house is cold - then the inner pane will be cold. If you keep all the windows closed (and your bedroom door closed) then there is a lack of ventilation. Certainly there is a lot of moisture in exhaled breath - but is your house damp as well? Do you have, for example, a tumble drier that vents into the house rather than through an outside wall? Did the window fitters have to do any re-plastering that is now drying out? I have double glazing and occasionally, if the weather is very cold, there is a small amount of condensation on bedroom windows in the morning (right at the bottom) - at this time of year, however, none at all. Kev |
#4
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condensation on new double glazed windows...
dkh wrote:
We got new upvc double glazed windows fitted to the front of our house this week. My wife is convinced that all our condensations problems on windows would disappear (we had pretty bad condensation on the old single pane sash windows) However this morning we noticed that the windows in our bedroom were a bit (not enough to need wiped down) steamed up (say bottom 15-20% of each pane) There was no condensation on any other of the new windows but there was a bit on each pane in our bedroom (6 panes). Is this just due to the moisture from our breath during the night? Is it fair to expect zero condensation on the windows, should we contact the DG company.. I did google a bit on this but most posts referred to moisture condensation between the panes which is not what we are experiencing. --dkh Even DG is not a perfect insulator. Its just BETTER. Sounds like you have a very humid room - try a little ventilation in it. |
#5
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condensation on new double glazed windows...
dkh wrote:
We got new upvc double glazed windows fitted to the front of our house this week. My wife is convinced that all our condensations problems on windows would disappear (we had pretty bad condensation on the old single pane sash windows) However this morning we noticed that the windows in our bedroom were a bit (not enough to need wiped down) steamed up (say bottom 15-20% of each pane) There was no condensation on any other of the new windows but there was a bit on each pane in our bedroom (6 panes). Is this just due to the moisture from our breath during the night? Is it fair to expect zero condensation on the windows, should we contact the DG company.. Buy a dehumidifier, problem sorted without opening windows and letting cold air in. |
#6
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condensation on new double glazed windows...
In article ,
"borgmaster" writes: Buy a dehumidifier, problem sorted without opening windows and letting cold air in. But you haven't said how to repair the resulting dished floorboards, plaster which has come away from shrunk laths, etc. Far better to ventilate the house properly. -- Andrew Gabriel |
#7
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condensation on new double glazed windows...
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#8
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condensation on new double glazed windows...
In message , Dave Fawthrop
writes On 08 Oct 2005 16:29:58 GMT, (Andrew Gabriel) wrote: | In article , | "borgmaster" writes: | Buy a dehumidifier, problem sorted without opening windows and letting | cold air in. | | But you haven't said how to repair the resulting dished | floorboards, plaster which has come away from shrunk laths, | etc. Far better to ventilate the house properly. But ventilation costs money to heat up the cold incoming air. Best to reduce ventilation as far as practicable. Well yes and no. Houses need ventilation, it's more a question of getting the right amount of ventilation in the right places. -- Chris French |
#9
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condensation on new double glazed windows...
chris French wrote:
In message , Dave Fawthrop writes On 08 Oct 2005 16:29:58 GMT, (Andrew Gabriel) wrote: | In article , | "borgmaster" writes: | Buy a dehumidifier, problem sorted without opening windows and letting | cold air in. | | But you haven't said how to repair the resulting dished | floorboards, plaster which has come away from shrunk laths, | etc. Far better to ventilate the house properly. But ventilation costs money to heat up the cold incoming air. Best to reduce ventilation as far as practicable. Well yes and no. Houses need ventilation, it's more a question of getting the right amount of ventilation in the right places. Naah. Go closed cycle. Just electrolyse the output from the dehumidifier, add lots of plants and light, a charcoal scrubber, and you're golden. |
#10
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condensation on new double glazed windows...
"Dave Fawthrop" wrote in message ... On 08 Oct 2005 16:29:58 GMT, (Andrew Gabriel) wrote: | In article , | "borgmaster" writes: | Buy a dehumidifier, problem sorted without opening windows and letting | cold air in. | | But you haven't said how to repair the resulting dished | floorboards, plaster which has come away from shrunk laths, | etc. Far better to ventilate the house properly. But ventilation costs money to heat up the cold incoming air. Best to reduce ventilation as far as practicable. I always wake up with a headache if I don't have a window open! Kev |
#11
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condensation on new double glazed windows...
"Uno Hoo!" wrote in message ... "Dave Fawthrop" wrote in message ... On 08 Oct 2005 16:29:58 GMT, (Andrew Gabriel) wrote: | In article , | "borgmaster" writes: | Buy a dehumidifier, problem sorted without opening windows and letting | cold air in. | | But you haven't said how to repair the resulting dished | floorboards, plaster which has come away from shrunk laths, | etc. Far better to ventilate the house properly. But ventilation costs money to heat up the cold incoming air. Best to reduce ventilation as far as practicable. I always wake up with a headache if I don't have a window open! Check fo CO ( carbon monoxide ) as soon as possible. |
#13
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condensation on new double glazed windows...
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#14
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condensation on new double glazed windows...
If you want de-humidifying the best thing is single glazed sash
windows. They condense a lot which then drains down and out to the outside via the gap at meeting rails and at the bottom sash staff bead junction. Double glazed and draught proof windows keep humidity in and although there may be slightly less codensation on the window glass itself (it being warmer than a single glazed window) there will be more condensation in other parts of the buildng sometimes resulting in damp walls, mould patches etc. If there is inadequate ventilation there will be more condensation on the DG windows than you would have had with SG windows, due to the higher humidity levels. One (stupid) answer to this prob is 'the de-humidifier' - an item which was virtually never heard of until double glazing and it's probs emerged. A more sensible answer is to open the windows a bit, and keep a window-leather and bucket handy to wipe off condensation. cheers Jacob |
#15
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condensation on new double glazed windows...
"Steve" wrote in message ... "Uno Hoo!" wrote in message ... "Dave Fawthrop" wrote in message ... On 08 Oct 2005 16:29:58 GMT, (Andrew Gabriel) wrote: | In article , | "borgmaster" writes: | Buy a dehumidifier, problem sorted without opening windows and letting | cold air in. | | But you haven't said how to repair the resulting dished | floorboards, plaster which has come away from shrunk laths, | etc. Far better to ventilate the house properly. But ventilation costs money to heat up the cold incoming air. Best to reduce ventilation as far as practicable. I always wake up with a headache if I don't have a window open! Check fo CO ( carbon monoxide ) as soon as possible. Doesn't matter where I am - in a hotel or staying with relatives. If the bedroom window is not opened to let fresh air in then I wake up with a headache. Kev |
#16
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condensation on new double glazed windows...
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#17
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condensation on new double glazed windows...
Bob Martin wrote:
in 455511 20051008 172958 (Andrew Gabriel) wrote: In article , "borgmaster" writes: Buy a dehumidifier, problem sorted without opening windows and letting cold air in. But you haven't said how to repair the resulting dished floorboards, plaster which has come away from shrunk laths, etc. Far better to ventilate the house properly. I've run a dehumidifier for the last 15 winters with no ill-effects. We had awful condensation problems before that, but none now. You must have bought a dehumidifier the same time as me Bob. I to have had over 15 years of condensation free winters with no ill effect to the fabric or structure of my property. Added benefit is that the water produced can be used in steam irons without the iron scaling up. I wonder if anyone who suggests that dehumidifiers can cause the problems they say have empirical evidence to proof their comments. |
#18
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condensation on new double glazed windows...
wrote in message ... On 9 Oct, "borgmaster" wrote: You must have bought a dehumidifier the same time as me Bob. I to have had over 15 years of condensation free winters with no ill effect to the fabric or structure of my property. Added benefit is that the water produced can be used in steam irons without the iron scaling up. I wonder if anyone who suggests that dehumidifiers can cause the problems they say have empirical evidence to proof their comments. That echoes my experiance. They aren't cheap to run though, and mine can only cope with 4 people in residence. any more and it's on continuously. It's saved quite a bit on paint for window frames too. As a result I've still got one or two wooden ones, and one even single glazed - although that ips planned to be replaced. It was bought originally after an attack of mould on an outside wall. There's been no sign of mould since. My goodness - it dries the outside of the house as well? ;-) Kev |
#19
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condensation on new double glazed windows...
In synonypis then ... it would appear that i dont have much to worry
about... Ive spoken to a work colleague who experiences the same and he claims the airflow around the base of the panes is not as good leading to small levels of condensation. -- dkh |
#20
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condensation on new double glazed windows...
On Sat, 08 Oct 2005 11:59:45 +0100, John Laird
wrote: On Sat, 08 Oct 2005 10:19:55 GMT, dkh wrote: We got new upvc double glazed windows fitted to the front of our house this week. My wife is convinced that all our condensations problems on windows would disappear (we had pretty bad condensation on the old single pane sash windows) However this morning we noticed that the windows in our bedroom were a bit (not enough to need wiped down) steamed up (say bottom 15-20% of each pane) There was no condensation on any other of the new windows but there was a bit on each pane in our bedroom (6 panes). Some condensation on DG is to be expected. To eliminate it completely, you would need better insulation around the frame (it's conduction through that which leads to the glass getting cold enough for moist air to condense out). I think some makes are better than others in this respect. I think John has the answer here, we are on our 4th home in 3 years, the last one was a bungalow with cheap DG, on cold mornings the windows had condensation around the lower parts of the window pane and frame. Our current house has a much higher quality DG, thicker chunkier frames, these show no condensation at all. Humidity gauge shows the same levels of humidity in both properties. Paul |
#21
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condensation on new double glazed windows...
Uno Hoo! wrote:
I always wake up with a headache if I don't have a window open! I usually wake up with one if I do... |
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