What Causes Condensation Between Windows & Storm Windows?
One of the most common ways to increase the energy efficiency of your home is to install storm windows. Not only do they cut down on uncomfortable drafts during cold winter months, but they can also help you save on energy costs. Unfortunately, storm windows can also pose problems when they collect condensation. Too much condensation can result in the deterioration of the paint on and around the sash of wood windows, damage to the wood and other forms of structural damage. Does this Spark an idea?
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High Humidity Inside the Home
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Storm window condensation often occurs when the relative humidity level inside of your home exceeds 40 percent. When the warm and excessively moist air of your home's interior comes in contact with the window--cooled from the lower outside temperature--the moisture in the air will condense on the cool surface of the glass.
Blocked Weep Holes
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Manufacturers design both aluminum and vinyl storm windows with small holes (called weep holes) along the bottom edge of the frame to allow condensation to escape. If these weep holes are clogged due to improperly performed caulking or painting jobs (or in some cases, by spider webs), the moist air will not escape, and will subsequently cause condensation.
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Aged Prime Windows
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Noticeably aged prime windows can also be the culprit of storm window condensation. If the pane of glass in the prime window is wobbly, or if there are gaps between the window frame and the sill, warm interior air can enter the buffer between the prime window and the storm window. Condensation can collect when this warm air comes in contact with the cool glass of the storm windows.
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- Photo Credit rain drops on the window image by Olga Shelego from Fotolia.com
