I live in less than a year old house with the latest energy efficient
windows. This is my first winter at this house. I see lots of
water/moisture around window, top to bottom, where they are literally
dripping to floor. I check other postings. I don't see any visible
leak (or at least I don't feel it). My wall clock which has humidity
level check is telling me it's at 30, so I think that's pretty low.
I'm keeping the house at 70 degrees and currently here at North Texas
the outside temperature is at above freezing (around 35??). All my
windows are like these. What can I do to get rid of this problem? I'm
contacting the home builder in mean time.
Is this on one window or all of them?...........how many are sweating?
Do you raise or lower the inside temp when you leave the home? Then
raise/lower the temp when you again arrive home, etc? Do you also have
storm windows on the outside of these windows?
Me...live in New England and always have this problem. After shutting
storm windows......no more problem.
All my windows are having the same problem, upstairs and downstairs,
some more than others. We keep the house at the same temp all day. No
such thing as storm windows, just dual layer with tiny gap between (no
air, someone told me) and it is slightly tinted blue per new city code
for hot summer here in Texas. The frames are aluminum and water is on
there, too. I'm gonna try getting reliable humidity meter and then try
de-humidifier. I think the reading is wrong, too. I also read that on
new house, the new lumber and concrete will generate more moisture
than, say old house. I asked my wife to do the followings meanwhile.
open blinds for better circulation.
circulate air from outside for an hour or so.
keep the fans running at "on" instead of "auto".
and keep mopping .....
Sorry to hear that. It is nearly certain that the problem is the
frames. Aluminum is a terrible material for frames. It happens to be a
great conductor. It is so good it is even draining the heat from the edges
of the window on the inside which is why they are also sweating.
Some aluminum frames have thermo brakes built in, but it sounds like
Sorry, but the only fix I know is to replace the windows.
Replace all windows?? I don't know how to convey that message to my
builder. All our subdivision homes (200+) will have to do the same. I
said aluminum but that's my best guess. They are metal for sure and
very thin. I can push them and bend them a little. I don't think I
can bend steel by my finger. Moisture is building at the frame, too.
I'm sure these are massively produced windows, probably well known
brand due to high efficiency rating.
Joseph Meehan wrote:
Let me add one thing. Sometimes you can have luck by allowing
additional air circulation to the windows. Open any curtains or drapes and
maybe even use a fan to move the air around. Try that for a couple of hours
and see if it helps.
First, buy a reliable humidity meter. The component
in your wall clock is probably malfunctioning.
Secondly "the latest energy efficient windows" suggests
your new house is probably more airtight than you were
formerly used to.
Condensation occurs on a surface (e.g. window glass) when
it is cooler than the "dew point," the temperature at which
dissolved H2O vapor in the air turns to visible liquid water.
This can easily happen when it is freezing outside and
you have single-pane windows. Double glazing reduces
the likelihood of interior condensation but it can still happen,
depending on actual temperatures and humidities. You
may feel the benefit of a dehumidifier (but not if your
actual humidity were truly 30 per cent.)
We had an almost identical posting string to this recently. In which
someone wondered whether to blame the condensation on their new
window. Sounds like high humidity in a well sealed house. Ventilate
and/or air exchange!
At 70 degree indoor temp. at 30% RH the window temperature would have to
reach 28 degrees or less for the moisture in the air to reach dew point.
With a accurate indoor temperature and RH reading you can determine the
temperature the glass must reach for moisture to condensate on the glass.
If the outdoor temperature dropped suffiently over night water droplets on
the glass could occur.
You might try if you have a humidifier turning it down, or if several long
showers are taken in the home each day, use the venting fan while taking a
shower. Also sometimes after boiling something like pasta this will happen
no matter what else you do if the home is very tight. If it is constant
problem it maybe worth monitoring the RH by purchasing a hygrometer or sling
About this energy efficient windows. I have to say that these windows
really work during summer. I had 2500 sq ft house just 2 miles south
from where I'm at and my electricity bill was about $300 per month.
Now with 4000 sq ft house with these windows, I'm still at $300 per
month, max !!! My old house was built in 1999. I'm sure other factors
helped, like SEER 14 AC (two of them), which I paid extra for. And
these blue tint actually looks pretty good. Sorry, off the subject.
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