Since 2003, GLS Engineering & Testing has been providing homeowners in Charleston and the surrounding areas with high-quality mold testing and many other indoor air quality services. We’re uniquely qualified to handle these tasks thanks to our combination of in-depth education and vast real-world experience. Our founder, Louis Schweers, has more than 25 years of experience with residential and commercial HVAC systems, moisture control, and indoor air quality. He is recognized as a leading authority in the field and is often asked to provide experts testimony in legal cases that involve HVAC, mold, moisture, building performance, and indoor air quality issues.