I found this company on the online yellow pages. I had also had one other company in to give me a quote on some work in the basement and crawlspace. The other company wanted to tare up a one foot section all around the base (interior) of my finished basement. Roy from Clarke informed me that that would be quite dangerous as my basement did not have an actual footing and the block walls sat on my cement slab floor. Meaning if you tore up the edge of the florr, the walls would essentially be drifting on broken pieces of concrete. The area the other cmpany planned on putting my sumppump was also wrong. They never used a lazer level, and when Roy checked it out, it turned out they were going to put the pump and hole at the highest point of the basement floor. Hard for water to run up hill. Upon some more investigation Roy determined that I really didn't need to deal with that extensive of a job. He found that the finished part of the basement was fine and the couple tiny problems were ones I could take care of myself. From there we focused on the crawlspace. We determined that that was the only area of actual concern. From there he informed me of the products and service to seal that area up with the membrane system. The explanations and quotes were easily understood. I decided on the spot that I would work with this company. The crews showed almost right when they said they would and got right to work. I was surprised at the work they could do in some very tight areas. The job did take a little longer than was expected (nothing to be concerned over when looking at the scope and situations). When the work was done I was very happy with what they had done and have no complaints. They were very good in explaining what I should watch for and have the insulation crews do when they were to come and spray insulation into the crawlspace (see my other review about Georgian Insulation Systems). This company was great to deal with throughout the entire process. They saved the structural integrity of my home, by actually knowing the different types of foundations, they saved my thousands of dollars by informing me of what I REALLY needed to have done, and they greatly improved the air quality in my home. Nothing but satisfied with this company and I would highly recommend them.