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Plastic / Drafty Window / Condensation ??

795 Views 3 Replies 4 Participants Last post by  SeniorSitizen
:vs_worry: Come Fall usual routine with Darfty Windows to install Plastic to cut down heat loss.. Have an older home built in the 70's that didn't come with Exhaust Fans Kitchen & Bathroom.. Consequently Condinsation Issues in the Bathroom.. If I had the Techno Where with all to Post a Picture to aid my discription of my query..lol..

Curious where the Condensation is going ?? Previous to putting plastic up the Condensation would pool on the window sill , if it wasn't wiped off it would run down the wall.. The Window is an Insert / Crank Style.. There is about a 3" Sill / Boarder around on the inside.. I installed the Plastic on the outside edge of the Sill.. The window has to be a good 20 yrs old, there is a small amount of Condensation that will still pool at the bottom of the window but only on the window frame itself, no condensation makes it onto the sill.. My Query is , any idea where the moisture is going ?? If the moisture was collecting on the Sill I know it would have to be leaking down inside the wall.. :vs_cool: Thoughts Appreciated , Cheers Thanks
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is probably evaporating into the air, as in the winter from heating the house the air becomes very dry..like putting a bucket of water on a wood stove it evaporates into the air....
The surface of that glass, when you have the plastic up, is also much colder because the room side heat is not getting to the glass and warming it up.

Warmer glass, less condensation.

http://www.dpcalc.org/
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is probably evaporating into the air, as in the winter from heating the house the air becomes very dry..like putting a bucket of water on a wood stove it evaporates into the air....
This is a common misconception because we've been told warm air is capable of holding more moisture than dry air. True, but that doesn't determine saturation point.

Using the link solve for relative humidity to determine which air mass is more dry or wet.

Example: Solve for RH by adjusting the temperature to 25° with the dew point set to 25° and observe the RH being 100 percent.

Now change the temperature to 80° while leaving the DP temperature at 25° and observe the RH.

http://dpcalc.org/
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