We have several customers that get a leak fixed fast. In this case there is no collateral damage. On the other hand we have several customers that wait a few years to get repairs done. Waiting gives time for the mold to grow and make black stains on the walls, floors, molding, and furniture. Along with black stains the smell of mold can get pretty bad. People do not like that smell. At that case the carpet must be removed and hauled out. If a repair is caught early the carpet can be lifted up and a fan placed on it to dry it out quickly before mold grows. Remember to always use a de-humidifier in a basement because humidity is heavy and falls down the stairway causing more in the basement than upstairs. In this case time is money....