Excessive Window Condensation – Ways To Reduce and Control Household Humidity

What is humidity/condensation?
It’s common knowledge that too much humidity can cause extensive and expensive damage throughout a home. It would help, of course, if we could see (and thus get a warning from) this harmful humidity build-up as it is occurring in the air. But we can’t. Humidity is as invisible as the air that carries it.

Fortunately there is one reliable visible warning sign. We see it when the build-up of water vapor condenses to form fog or frost on the window panes. This brochure is published to help you understand and come to grips with the problems excessive home humidity can cause and ways to remedy the problem.

Fogged-over or frost-coated windows: A problem or a symptom?
Both. However, it should be pointed out that a little fogging or frosting that comes and goes on the lower corners of your windows is nothing to be concerned about.

Condensation that blocks the whole window with fog or frost, though, presents more of a problem. Runoff can cause staining on woodwork, wallpaper, and plaster.

Heavy condensation of this type on your windows is symptomatic of moisture damage that can be occurring throughout your home. Household humidity is a modern problem. That’s because more and more of us are living in moisture trapping “tight” homes that are more economical to heat and cool as well as being cleaner and more comfortable. So…were we unwise or even a little hasty in opting for the energy-efficient “tight” home? Definitely not. This information explains the moisture problems of  the modern home and offers practical and easy to follow suggestions for solving the problem of excess indoor humidity.

How does excess humidity cause home damage?
Outside air is usually drier than the air in your home. The moisture in wet air is compelled to flow toward and mix with the outside drier air. And it does so with a force of nature that is known as vapor pressure. A relentless force, vapor pressure can even go upstream to air flow as it forces moisture through wood, plaster, brick, cement and most of the other materials we use to build our homes. This phenomenon can force excessive indoor humidity through siding to form blisters under the exterior paint.