
Indoor vs. Outdoor Climate
Gilbert's outdoor humidity is famously low, but modern, energy-efficient homes are sealed tight. Activities like cooking, showering, and running the dishwasher generate significant indoor humidity. If this moisture cannot escape, it condenses on cool surfaces (like windows and exterior walls), providing enough moisture for mold to grow without a plumbing leak.
Always run exhaust fans in bathrooms and kitchens, and consider a whole-home dehumidifier if your indoor humidity consistently stays above 50%.



