We’ve all had windows that fog up or sweat, but should you be worried about that window condensation?
The greater the difference between outdoor and indoor temperatures, the more likely you will see visible moisture on the interior of your windows. A common example of this type of temporary condensation is a window above the kitchen sink steaming up when you run the hot water for a long time, and that fog will disappear rather quickly.
Causes of temporary interior window condensation include:
• hot baths and showers
• cooking or dishwashing in the kitchen
• running the dryer or a hot-water washer
• the start of the winter heating season
• sudden drop in outdoor temperature
Exterior condensation usually happens in the summer when the glass temperature drops below the dew point temperature outside, during high relative humidity with no breezes, or if there are plants, shrubs or trees close to the window trapping some moisture. Exterior condensation tends to evaporate quickly as weather and sunlight conditions change, and does not affect the interior of your home so there usually is no cause for concern.
When Condensation Is a Problem
Excess moisture can eventually cause problems with the maintenance of your home or your health. You will want to find a solution if you see the following:
• Condensation stays on the window throughout a day, even after the outside temperature warms up
• Condensation is between the panes of glass, which may indicate a seal failure in your window
• Condensation is forming on the walls
• The air smells musty, in general, or regular household odors linger too long
• Mold, mildew or rot is visible on walls, ceilings and windows
Limiting the occurrence of condensation happens by reducing the conditions that cause it.
Reduce Interior Moisture
• Maintain proper humidity levels in your home; if it’s too high run a dehumidifier
• Limit the number of aquariums, plants or anything that requires water
• Keep gas appliances and plumbing in proper working order
• Avoid air-drying clothes indoors
• Crack open a window while showering, bathing, cooking or laundering to let excess moisture escape
• Run bathroom and kitchen exhaust fans for longer than you currently do
• Increase or add ceiling fans and a ventilation system that vents to the outside
• Properly ventilate crawl spaces and make sure attic louvers stay open all year
• Regularly open blinds and drapes because window coverings restrict air flow over the glass
If you still have concerns about condensation in your Metro St. Louis home, have the water management experts at Mosby Building Arts analyze your home and solve the problems once and for all. Call the Mosby office at 314.909.1800 or contact them here.