Uncontrolled moisture in your crawlspace can create a breeding ground for mold, pests, and structural damage, which can cause serious health and safety problems for your family. Call Helitech. The experts in crawlspace waterproofing and encapsulation. Helitech, your hometown waterproofing contractor for over 30 years, proudly serving Illinois, Missouri, Quad Cities, and Western Kentucky. “They healed my home, they’ll heal yours, too,” says Joe Buck. Heal your home with Helitech.