There are many types of toxic mold which create health and structure hazards found in walls, ceilings, carpets, and basement crawl spaces. The effects on the health and safety of individuals within the indoor environment are crucial. Mold can wreak havoc on your immune system. Every day, people experience unpredicted sick symptoms and allergic reactions like dizziness, nausea, weakness, sleeplessness, headaches and prolonged flu-like symptoms - seemingly without reason.