Why do new homes typically have more mold?

New homes often have increased instances of mold due to their improved sealing techniques aimed at enhancing energy efficiency. While better sealing is beneficial for maintaining temperature and reducing humidity loss, it can inadvertently trap moisture indoors. If the interior humidity levels rise and there is insufficient airflow to evaporate this moisture, it creates an ideal environment for mold growth.

In contrast, older homes may have more ventilation, allowing for better air circulation and moisture control, which helps to mitigate mold issues. The use of materials and insulation techniques in new constructions also means that if moisture does accumulate, it may not dry out as effectively due to the tighter building envelope. This aspect underscores the importance of proper ventilation and humidity control in modern buildings, especially when aiming to prevent mold development.