Elevated relative humidity at a surface–70 percent or higher—can lead to problems with mold, corrosion, decay and other moisture related deterioration. When relative humidity reaches 100 percent, condensation can occur on surfaces leading to a whole host of additional problems. An elevated relative humidity in carpet and within fabrics can lead to dust mite infestation and mildew (mildew is mold growing on fabrics).

Related Documents for Further Reading:

RR-1010: Innovative Passive Ventilation Water-Resistive Barriers—How Do They Work?

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