For most floors condensation is the main reason for the sweating especially in warm weather.
House roof shingles sweat in summer.
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In the summer of 2000 they studied this very issue.
The low e coating minimizes the heat transfer from inside so the outside glass surface can cool notably below the outside air temperatures.
When warm humid air from outside comes into contact with the cold concrete the air rapidly cools and condenses on the surface causing the wetness.
Roof condensation has a very specific cause.
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It s no surprise that this tends to occur more in colder months when home heating is more common and intense.
High levels of humidity inside the home cause moisture to condense on the walls and sometimes the windows as well.
What you see is condensation also known as ductwork sweating.
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This is sometimes common in older houses that do not have the proper vents or fans to eject excess moist air.
Moisture occurs when heated air inside the home rises up to the roof where it meets the colder temperatures of outside air.
The rapid cooling leads to immediate condensation.
Summer is the time of year when your air conditioning unit has to work the hardest to cool your home.
On hot days you may notice water droplets forming on your visible air ducts and wonder whether this is normal.
With just the right mix of inside temperatures accompanied by outside temperature then adding the outside humidity the windows with low e shield can develop condensation.
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Prolonged periods of high moisture in the house can lead to mold and the walls may even begin to rot.