Sometimes it seems like house problems come in pairs, and this is exactly the case if you have ceiling mold in your home. Ceiling mold is the product of either a roof leak or possible HVAC problems. In either case, water is leaking from above and pooling on your ceiling which eventually causes mold to grow. The first step in handling this issue is to determine the source of the leak so that it can be addressed, and then the damaged ceiling materials can be removed and repaired.