Does making a home tighter lead to more issues with mold?

Not necessarily. Mold issues appear when a home has problems with moisture. These problems may be due to water from improper landscaping or plumbing leaks in the crawl space, improper flashing, lack of exterior rain planes behind siding and/or lack of proper ventilation. Homes should have proper ventilation to help prevent issues with mold. The best building practice is to build a home tight and control the home’s ventilation using mechanical ventilation such as kitchen, bathroom and whole house fans. Most new homes are tight enough to need mechanical ventilation with make up air to control moisture.

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