Do You Have Excess Basement Humidity? Spot the Signs

Is there excess humidity in your basement? You may be wondering if there is, but you may not be sure how to spot the signs. It may not be as simple as a damp feel to the air, or an overall clamminess. There are times of the year and certain circumstances that can cause the humidity levels in your basement to be too great – and that overabundance of moisture can lead to problems. We’ve provided some information here that can help you to determine the level of humidity in your basement, and to help you decide what your next step should be.

During the months of October through the end of April, excess humidity in a basement is mostly a non-issue and the dew points and temperatures are relative low. Most homes and basements can average well below 40 percent humidity levels in the basement during these months of the year. During the months of May through September, however, humidity levels and the dew point average well above 55 percent for the humidity levels and the dew points well above 55 degrees. These conditions may not be the best for your damp dark basement.

Cool air and humidity fall to the lowest levels of every floor level due to the density of the air mass. As the humidity weights upon itself in settlement, this air often comes in contact with the cold basement walls, which have an annual average temperature of around 55 degrees. When the dew points begin to hit around 60 degrees, this dense moist air mass begins to turn from vapor to liquid. The dew point is simply the temperature at which moisture in the atmosphere will turn from humid vapor into condensed liquid.

Dew point, for example, is much like a glass of ice water on the picnic table on a hot humid day, forming water droplets that fall to the base of the glass. Many basements can form large puddles of this condensed humidity, and oftentimes, homeowners will open windows. Unfortunately, this will only accelerate this condition, bringing more humidity for the cold walls to condense. If you have carpet, foam furniture, books, clothes, or cardboard in your basement, these soft items will absorb this humidity. In the darkness, mold or bacteria will begin to grow. Once the bacterium dies off, it begins to leave a musty odor.

A Humidex installed in your home will begin to remove and control this dense settling humid air and the results can be fantastic, even beneficial health wise for your family. A Humidex system is highly effective in removing and controlling mold, mildew and bacteria before it begins to affect your family’s health. To learn more about basement humidity, and if a Humidex system is right for you, feel free to contact Basement Waterproofing, Inc. for more information, as well as for a free quote and evaluation for your home.

One comment

  1. Richmond on October 27, 2014 at 2:56 pm said:

    We bought an old house that has a very humid crawl space particularly in Spring and Summer. We are not sure why that is and want to explore solutions to deal with the problem to make the house sound and healthy.

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