My house is 50 yrs old. I replaced the old windows with the new ones
My question is: should I have condensation on the windows?
I am getting the sense that the wrong caulking was used <painters
caulk instead of windows doors silicon caulk> resulting in an enormous
amount of water forming on the inside pane.
If the wrong caulking was used, won't it be pretty simply to re-caulk
with silicon caulking?
Sounds good to me, if the new windows leak less air in wintertime,
so the house RH is higher, with condensation. Now you might try to
find and fix humidity sources in the house, eg rainwater leaks or
a damp basement floor. And maybe run a bathroom or kitchen exhaust
fan with a humidistat when the indoor RH rises to 50%.
On Jan 2, 11:43 am, firstname.lastname@example.org wrote:
All my neighbors windows get condensation, too, with the new windows
and old houses.... Prior owner used to run central air circulation
all the time, and told me to keep the house dry. It's only wet when we
are at 100% humidity (rain, fog, etc). I wipe the windows down, but,
geez, I would have stayed with the old windows if I knew there'd still
be this horrendous condensation....
Well, I will run fans to keep the air moving.
I don't know enough about your house to be completely sure about this,
but I'm guessing that you have gained more by replacing the windows
than if you hadn't.
In other words, assuming the new windows are more energy efficient
than the old ones, your energy costs should be lower over the long
term, even if you still have condensation.
Now that you've lowered your energy costs, you should deal with the
condensation as a separate issue. If the condensation is truly
"horrendous" then you have way too much humidity in the house and
perhaps should be running a dehumidifier. Too much humidity can lead
to mold, rot, peeling paint, etc. and if you've sealed the house
better by replacing the windows, then you are trapping the humidity in
and need to get rid of it some other way.
All things considered, you're probably still better off with the new
new windows will save money on heating and cooling even if you get
does your home have a humidifier?
a neighbor had this problem and found out his humidstat was bad, house
way too humid.
new humidstat fixed him all up fast.
excess humidity can cause all sorts of troubles like rotting roof from
really should be looked it.
cauling not the cause
On Wed, 2 Jan 2008 11:56:29 -0800 (PST), "MRS. CLEAN"
Thanks for posting this: we have almost all the original windows on
this 1930 house (with good triple-track storm windows), and I think
they look great and really aren't worth the $$ to replace, especially
given the risk of this kind of condensation.
Why do you feel that the caulk is the cause of the problem?
Here's an excerpt from a thread related to condensation found at
*** Begin Included Text ***
From the Simonton site:
Q. What causes condensation on windows?
A. Condensation, or "sweating," is a natural occurrence on all windows
and is caused by excess humidity, or invisible water vapor, present in
the air. When this water vapor comes in contact with a surface which
is at a cooler temperature, the vapor turns to visible droplets of
Each Simonton window has many features built in to keep the
temperature of the glass as warm as possible and thus reduce
condensation. Our insulating glass units provide superior energy
efficiency to reduce the potential for condensation. However, there is
no such thing as a condensation-free window in high humidity
conditions. Controlling the amount of moisture in your home is the
most effective action you can take to avoid condensation.
Continue to monitor the windows. Condensation,as you described, is
very common at this time the year. Many times this is just a temporary
You might want to check and make sure that all of your windows are
properly locked. Sometimes they get locked open and excessive
moisture will form. As mentioned by someone earlier you might want to
check your homes humidity level. 35-40 % should be adequate.
Condensation is enough of a performance issue it is rated and tested
as CDF and is listed if not on the window label then by reputable
major companies. What brand of windows and type did you use. I can
tell you Pella condense quicker than Anderson as I have both. Its not
the caulk, its the glass and how the frame was made. Windows are not
equal in performance.
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