Window Condensation

Every winter we get questions regarding window condensation, since it’s such a concern to Homeowners. When John and I were younger, we use to think it was fun to watch our kids leave notes in the fogged glass. We now know that it is an important problem to fix.

Our friends at Marvin Windows provide a great answer to this question about Condensation.

When the temperature drops outdoors, the glass on your windows and doors tends to have lower temperatures than other surfaces in your house, and is the first place that you’ll notice condensation in your home. Warmer air is capable of holding much more moisture than cooler air. When the temperature reaches its dew point, the moisture condenses, attaching to the nearest cool surface. Condensation is an unsightly problem. The last thing you want on your windows is a fog blocking the view. If water is chronically accumulating on glass, chances are it is accumulating on other harder to see surfaces such as wall and roof cavities. If left uncontrolled, excess moisture can have serious consequences, including:

  • Mold or mildew
  • Wood rot and warping
  • Roof ice build-up
  • Damp, ineffective insulation
  • Discolored, blistered or bubbling paint
  • Damaging moisture inside walls and attic

Read about Excess Moisture: Causes & Cures and the entire explanation at this link: http://www.marvin.com/windows-and-doors/condensation/

Here’s another good link from the NFRC: http://www.nfrc.org/documents/condensation.pdf

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