We have used IES for a number of years to help with crawl space moisture, indoor air quality, and attic insulation. They have done extensive work in our crawlspace (replacing, cleaning, sealing all ductwork; application of fungicide; sealing the space). Their work is excellent. A detailed breakdown of proposed work and cost with pictures of your particular situation is reviewed with you. Questions are answered promptly and completely. When you proceed with work, the crew arrives on time and quickly gets to work. The crew is friendly, knowledgeable, and go the extra mile (eg: changing some burned out light bulbs in the crawl space). They work almost nonstop and get the job done on time and leave the area spotless. Afterwards, you’ll get a full report with pictures of the before/after and any problems. Our crawl space has remained clean and dry over the years since their services. In all, we highly recommend them without reservation.