Tight and Energy Efficient Construction Can Trap Moisture

Modern homes are designed to conserve or "trap" energy. That's good. But in the process, such homes can also trap moisture and that can cause big problems and costly damage. For example, if the soil around the foundation is soaked from roof drainage water, we can assume that at least some of that moisture will find its way into the basement, crawl space or the concrete floor. Some of this moisture will then be absorbed by the air in the home. If this occurs in the winter time, we can assume that the warmed air in the home will absorb a great deal of moisture (warm air can absorb more moisture than cold air). If this moisture saturated air finds itself into some spaces with cold surfaces - and it will, then some of this moisture will condense against these cold surfaces. This can happen at windows, attic plywood and inside exterior walls, etc.

Condensation at windows may just be bothersome, but in attics and walls it can cause fungal wood-rot and that can be very expensive to repair. A good gutter system helps to control the amount of water and moisture that gets into a structure. And that, in combination with various types of venting system, can prevent the damage from trapped moisture.