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Mold can grow rapidly in damp environments, making it difficult to identify the source of moisture. It's essential to take proactive measures to prevent mold growth in new houses.

1. Ensure proper ventilation by installing windows and doors with screens, and consider adding insulation to reduce heat loss and moisture entry points.
2. Use a dehumidifier to control the humidity levels in your home, especially in areas prone to high moisture, such as basements or crawlspaces.
3. Regularly inspect your home for signs of water damage, condensation, or musty odors, and address any issues promptly to prevent mold growth.
4. Clean and dry surfaces regularly, including floors, walls, and ceilings, using a solution of water and bleach (1:10 ratio) to prevent moisture buildup.

https://www.scalingupexcellence.com/6-mold-prevention-tips-for-your-new-house/