Signs can include odours, mould or damp materials in the foundation. If you want to be absolutely sure of the moisture level in the crawl space, you can buy a hygrometer and measure the moisture level.
To prevent mould growth, you need to keep the humidity around 50%. A powerful dehumidifier is a simple and effective solution.
Crawl spaces often have high humidity because they are close to the ground. When humidity is high for a long time, mould can start to grow. A powerful dehumidifier keeps the humidity at a suitable level.





