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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
Posted to uk.d-i-y,alt.home.repair,alt.building.construction
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Condensation on double glazing
I had some double glazing fitted last year, it was fitted by a FENSA
registered company, but was the cheapest quote we found - approx £4000 for 6 leaded windows and a patio door. We are happy with the windows etc, but in winter sometimes get condensation on the windows. This only happens on mornings where it is particually cold and wet out, it burns off by midday, and is worse in rooms where people have been sleeping. The water is not inbetween the pannels (as I can wipe it off) and the panels dont feel particually cold. The links below are some pictures of the condensation, I just wanted to know if it is a result of buying cheap double glazing (in which case fair enough) or if it means they are faulty. Is there some kind of measureable leagal minimum that the windows need to comply with? http://www.websphereusergroup.org.uk/temp/IMGP1572.JPG http://www.websphereusergroup.org.uk/temp/IMGP1573.JPG http://www.websphereusergroup.org.uk/temp/IMGP1574.JPG Thanks David Bevan http://www.davidbevan.co.uk |
#2
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Condensation on double glazing
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#3
Posted to uk.d-i-y,alt.home.repair,alt.building.construction
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Condensation on double glazing
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#5
Posted to uk.d-i-y,alt.home.repair,alt.building.construction
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Condensation on double glazing
In article .com,
wrote: We are happy with the windows etc, but in winter sometimes get condensation on the windows. This only happens on mornings where it is particually cold and wet out, it burns off by midday, and is worse in rooms where people have been sleeping. Double glazing doesn't prevent condensation but merely reduces it. People in a room produce water vapour from their breath, and this tends to condense out on the coldest part of the room which will still be the window. You need either more ventilation or stopping the temperature dropping so low inside to prevent it. -- *The most wasted day of all is one in which we have not laughed.* Dave Plowman London SW To e-mail, change noise into sound. |
#6
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Condensation on double glazing
The surface temperature of the inside pane of glass is colder than the
dew point of the air in the room. Either you are running a humidifier with too high a setting or you bought cheap glass, which is the most likely answer. I just replaced my widows 2 years ago. The company had a good reputation and was not the most expensive, but I got the most expensive windows they had. It was worth the money. Note, the colder it is outside, the more likely it is the condensation will occur, as it makes the glass colder. Moisture levels outside will have less impact than temperature outside. Stretch |
#7
Posted to uk.d-i-y,alt.home.repair,alt.building.construction
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Condensation on double glazing
"Harry Bloomfield" wrote in message ... explained : I had some double glazing fitted last year, it was fitted by a FENSA registered company, but was the cheapest quote we found - approx £4000 for 6 leaded windows and a patio door. We are happy with the windows etc, but in winter sometimes get condensation on the windows. This only happens on mornings where it is particually cold and wet out, it burns off by midday, and is worse in rooms where people have been sleeping. Cavity wall insulation will also help prevent in a small way - moisture being absorbed by the walls to be released later in the day. On the contrary - we found that we had MORE condensation on dg windows after our cavities were insulated - donkey's years ago. The walls were then warmer than the glass so the condensation appeared on the glass. It proved that the cavity insulation was working! Mary -- Regards, Harry (M1BYT) (L) http://www.ukradioamateur.co.uk |
#8
Posted to uk.d-i-y,alt.home.repair,alt.building.construction
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Condensation on double glazing
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#9
Posted to uk.d-i-y,alt.home.repair,alt.building.construction
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Condensation on double glazing
wrote in message oups.com... I had some double glazing fitted last year, it was fitted by a FENSA registered company, but was the cheapest quote we found - approx £4000 for 6 leaded windows and a patio door. As others have said..it's due to a lack of ventilation. Replacing old windows with double glazing can sometimes make condensation worse because it eliminates ventilation through the badly fitting old windows. When people breath they put water vapour into the air. The amount of water vapour that the air can hold depends on the temperature. If the temperature drops - for example when the damp air comes into contact with cold glass the excess can condense out (=rain). There are two main solutions.... 1) Add ventilation (open windows or trickle vents) to let the damp air out and dry air in (outside air is normally dryer even in winter). 2) Use a dehumidifier to remove the water vapour from the air. Personally I feel the only "perfect" solution is to install whole house ventilation system with heat recovery. Think of it like opening a windows without loosing the heat. http://www.toolbase.org/techinv/tech...chnologyID=202 http://www.villavent.co.uk/domestic-...on-systems.htm Note that UK Building Regulations require replacement windows to meet the Building Regulations. This can include the need for them to have built in trickle vents (if the house doesn't have a ventilation system). If your new windows have trickle vents in the frames make sure they are open - that might be sufficient but I suspect not as they are frequently a bit on the small side. |
#10
Posted to uk.d-i-y,alt.home.repair,alt.building.construction
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Condensation on double glazing
It happens that Mary Fisher formulated :
On the contrary - we found that we had MORE condensation on dg windows after our cavities were insulated - donkey's years ago. The walls were then warmer than the glass so the condensation appeared on the glass. It proved that the cavity insulation was working! Hi Mary... That was not our experience, though I suppose it depends how much moisture is absorbed into the cold walls. The DG was installed first and we initially had similar problems to the OP. I then added ventilation followed some years later by the CWI. Our internal atmosphere is now so dry, that we have had to resort to adding water evaporation trays to the tops of radiators to increase the humidity in winter. -- Regards, Harry (M1BYT) (L) http://www.ukradioamateur.co.uk |
#11
Posted to uk.d-i-y,alt.home.repair,alt.building.construction
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Condensation on double glazing
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#12
Posted to uk.d-i-y,alt.home.repair,alt.building.construction
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Condensation on double glazing
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#13
Posted to uk.d-i-y,alt.home.repair,alt.building.construction
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Condensation on double glazing
wrote: I had some double glazing fitted last year, it was fitted by a FENSA registered company, but was the cheapest quote we found - approx £4000 for 6 leaded windows and a patio door. We are happy with the windows etc, but in winter sometimes get condensation on the windows. This only happens on mornings where it is particually cold and wet out, it burns off by midday, and is worse in rooms where people have been sleeping. The water is not inbetween the pannels (as I can wipe it off) and the panels dont feel particually cold. The links below are some pictures of the condensation, I just wanted to know if it is a result of buying cheap double glazing (in which case fair enough) or if it means they are faulty. Is there some kind of measureable leagal minimum that the windows need to comply with? http://www.websphereusergroup.org.uk/temp/IMGP1572.JPG http://www.websphereusergroup.org.uk/temp/IMGP1573.JPG http://www.websphereusergroup.org.uk/temp/IMGP1574.JPG I had the same thing with my patio door, a metal-framed one installed circa 30 years ago. Moisture would condense on the frame, and on the lower part of the glass, eventually leaving small patches of mould on some of the hardwood frame. It took me a little while to work out what was happening. The pictures you took show exactly the problem here. I traced the problem to a 'reverse chimney' effect due to the curtains being closed. There was circa a 1" gap between the top of the curtains and the ceiling, and similar one at the bottom. As air trapped by the curtains cooled, it sank and emerged into the dining area, to be replaced by warm moist air at the top. There comes a point somewhere near but not at the bottom of the glass where the temperature falls below the dew-point, and moisture condenses out. The pattern of condensation is exactly as depicted in your photos. This continues ad infinitum, drawing moisture from the room and depositing it on the glass and frame. The colder the night, the farther up the glass the condensation started. Putting 'sammy snakes' (draught excluders) along the bottom of the curtains stopped the problem completely. Although cutting off the flow of air made the glass colder, the very limited airflow meant that condensed vapour could not be replaced, and the problem has gone away. The dining area is also a lot warmer! I put a wireless thermometer between the curtains and the glass. With no draught excluder in place, the temperature drop from ambient was about 5 degC or so. With the sammy snakes in place, the thermometer read just above the outside temperature, a drop on the night in question of over 20 degC. My suggestions: make sure that obvious sources of dampness are removed from the rooms concerned (towels, clothing, large plants, etc) and cut the air-flow off with draught-excluders. Your window-cills look ideal for this. It may take a day or two for your rooms to reach any new humidity equilibrium. HTH |
#14
Posted to uk.d-i-y,alt.home.repair,alt.building.construction
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Condensation on double glazing
Condensation is NORMAL
On 18 Feb 2006 01:38:37 -0800, wrote: I had some double glazing fitted last year, it was fitted by a FENSA registered company, but was the cheapest quote we found - approx £4000 for 6 leaded windows and a patio door. We are happy with the windows etc, but in winter sometimes get condensation on the windows. This only happens on mornings where it is particually cold and wet out, it burns off by midday, and is worse in rooms where people have been sleeping. The water is not inbetween the pannels (as I can wipe it off) and the panels dont feel particually cold. The links below are some pictures of the condensation, I just wanted to know if it is a result of buying cheap double glazing (in which case fair enough) or if it means they are faulty. Is there some kind of measureable leagal minimum that the windows need to comply with? http://www.websphereusergroup.org.uk/temp/IMGP1572.JPG http://www.websphereusergroup.org.uk/temp/IMGP1573.JPG http://www.websphereusergroup.org.uk/temp/IMGP1574.JPG Thanks David Bevan http://www.davidbevan.co.uk |
#15
Posted to uk.d-i-y,alt.home.repair,alt.building.construction
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Condensation on double glazing
wrote in news:1140255517.105098.318840
@g44g2000cwa.googlegroups.com: I had some double glazing fitted last year, it was fitted by a FENSA registered company, but was the cheapest quote we found - approx £4000 for 6 leaded windows and a patio door. We are happy with the windows etc, but in winter sometimes get condensation on the windows. This only happens on mornings where it is particually cold and wet out, it burns off by midday, and is worse in rooms where people have been sleeping. The water is not inbetween the pannels (as I can wipe it off) and the panels dont feel particually cold. The links below are some pictures of the condensation, I just wanted to know if it is a result of buying cheap double glazing (in which case fair enough) or if it means they are faulty. Is there some kind of measureable leagal minimum that the windows need to comply with? http://www.websphereusergroup.org.uk/temp/IMGP1572.JPG http://www.websphereusergroup.org.uk/temp/IMGP1573.JPG http://www.websphereusergroup.org.uk/temp/IMGP1574.JPG Thanks David Bevan http://www.davidbevan.co.uk Surprised no one has asked (or I missed it) if you have exhaust fans in the shower(s) and using them with the door closed. Or if person(s) tend to exit and leave door open shortly after shower. Better to leave fan on after exiting and close door until at least the mirror clears. May not have made a difference before but does now. Just one of many possible contributors but a significant one. This only happens on mornings where it is particually cold and wet out Are there other types in the UK? :-) "websphere" - don't see many of those users in the general population. |
#16
Posted to uk.d-i-y,alt.home.repair,alt.building.construction
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Condensation on double glazing
"Al Bundy" wrote in message ... Surprised no one has asked (or I missed it) if you have exhaust fans in the shower(s) and using them with the door closed. Or if person(s) tend to exit and leave door open shortly after shower. Better to leave fan on after exiting and close door until at least the mirror clears. May not have made a difference before but does now. Except that the fan uses power, an open door doesn't. Mary |
#17
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Condensation on double glazing
Mary Fisher wrote:
Except that the fan uses power, an open door doesn't. A fan uses very little power, and provides a huge improvement in the air quality. An open door uses no power but simply moves the moisture from one place to another - hardly a solution. -- Grunff |
#18
Posted to uk.d-i-y,alt.home.repair,alt.building.construction
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Condensation on double glazing
"Grunff" wrote in message ... Mary Fisher wrote: Except that the fan uses power, an open door doesn't. A fan uses very little power, and provides a huge improvement in the air quality. An open door uses no power but simply moves the moisture from one place to another - hardly a solution. The poster was complaining about condensation on windows. Opening a door, in my experience, solves the problem. Mary -- Grunff |
#19
Posted to uk.d-i-y,alt.home.repair,alt.building.construction
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Condensation on double glazing
"Mary Fisher" wrote in message t... "Grunff" wrote in message ... Mary Fisher wrote: Except that the fan uses power, an open door doesn't. A fan uses very little power, and provides a huge improvement in the air quality. An open door uses no power but simply moves the moisture from one place to another - hardly a solution. The poster was complaining about condensation on windows. Opening a door, in my experience, solves the problem. Don't let it hit you in the ass on your way out...... |
#20
Posted to uk.d-i-y,alt.home.repair,alt.building.construction
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Condensation on double glazing
Mary Fisher wrote:
The poster was complaining about condensation on windows. Opening a door, in my experience, solves the problem. You were specifically referring to bathroom fans (in your reply to Al's post) - a bathroom fan is infinitely superior to just opening a door. -- Grunff |
#21
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Condensation on double glazing
On Mon, 20 Feb 2006 12:12:55 +0000, Grunff wrote:
Mary Fisher wrote: The poster was complaining about condensation on windows. Opening a door, in my experience, solves the problem. You were specifically referring to bathroom fans (in your reply to Al's post) - a bathroom fan is infinitely superior to just opening a door. She's probably bathing in a tin bath located in the outhouse next to the chicken run. Opening a door in those circumstances obviously lets any condensation out. (and the bird flu in) -- |
#22
Posted to uk.d-i-y,alt.home.repair,alt.building.construction
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Condensation on double glazing
"Matt" wrote in message ... On Mon, 20 Feb 2006 12:12:55 +0000, Grunff wrote: Mary Fisher wrote: The poster was complaining about condensation on windows. Opening a door, in my experience, solves the problem. You were specifically referring to bathroom fans (in your reply to Al's post) - a bathroom fan is infinitely superior to just opening a door. She's probably bathing in a tin bath located in the outhouse next to the chicken run. Opening a door in those circumstances obviously lets any condensation out. (and the bird flu in) Can't afford tin. Galvanised has to do for us - when it's allowed again because of the toes. The hens don't have a run, they're free range until Defra says we have to take them indoors. -- |
#23
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Condensation on double glazing
First it's normal to see a SMALL amount of condensation (usually in the
corners of the windows) overnight. You however, have a little too much moisture in the air (windows are fine.) As others have pointed out, either turn down the humidifier during cold weather and use the kitchen fans when cooking and bath fans when bathing in the winter. (What you see on the windows is also being seen in the attic cavity and inside the walls as condensation when the moisture hits the dew point inside the insulation.) Dennis wrote in message oups.com... I had some double glazing fitted last year, it was fitted by a FENSA We are happy with the windows etc, but in winter sometimes get condensation on the windows. This only happens on mornings where it is particually cold and wet out, it burns off by midday, and is worse in rooms where people have been sleeping. |
#24
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Condensation on double glazing
Matt wrote in
: On Mon, 20 Feb 2006 12:12:55 +0000, Grunff wrote: Mary Fisher wrote: The poster was complaining about condensation on windows. Opening a door, in my experience, solves the problem. You were specifically referring to bathroom fans (in your reply to Al's post) - a bathroom fan is infinitely superior to just opening a door. She's probably bathing in a tin bath located in the outhouse next to the chicken run. Opening a door in those circumstances obviously lets any condensation out. (and the bird flu in) I suspect Mary Fisher is just a fun'in ya. I mean look at the stupid remarks. Then look at her "handle". Fisher as in fishing for a sap. Mary as in happy == Merry Fisher. |
#25
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Condensation on double glazing
Al Bundy wrote:
[snip] I suspect Mary Fisher is just a fun'in ya. I mean look at the stupid remarks. Then look at her "handle". Fisher as in fishing for a sap. Mary as in happy == Merry Fisher. Oh FFS have you never read a book in your life? |
#26
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Condensation on double glazing
Steve Firth wrote in
: Al Bundy wrote: [snip] I suspect Mary Fisher is just a fun'in ya. I mean look at the stupid remarks. Then look at her "handle". Fisher as in fishing for a sap. Mary as in happy == Merry Fisher. Oh FFS have you never read a book in your life? Does the TV Guide count? |
#27
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Condensation on double glazing
wrote:
I had some double glazing fitted last year, it was fitted by a FENSA registered company, but was the cheapest quote we found - approx £4000 for 6 leaded windows and a patio door. We are happy with the windows etc, but in winter sometimes get condensation on the windows. This only happens on mornings where it is particually cold and wet out, it burns off by midday, and is worse in rooms where people have been sleeping. The water is not inbetween the pannels (as I can wipe it off) and the panels dont feel particually cold. The links below are some pictures of the condensation, I just wanted to know if it is a result of buying cheap double glazing (in which case fair enough) or if it means they are faulty. Is there some kind of measureable leagal minimum that the windows need to comply with? http://www.websphereusergroup.org.uk/temp/IMGP1572.JPG http://www.websphereusergroup.org.uk/temp/IMGP1573.JPG http://www.websphereusergroup.org.uk/temp/IMGP1574.JPG Thanks David Bevan http://www.davidbevan.co.uk Hi, Think ventilation and humidity control. |
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