Very recently, I contracted Chris to seal an exterior basement block wall, a small area. He arrived on the time he said he'd be there, he quoted me the price at the site and I agreed. He was very knowledgeable about the products he was using, what they would accomplish, and the problem he was tackling. He went step by step explain this to me. I appreciated that. And before he and his assistant left, he gave me some information on retaining walls and how they're constructed. He and his assistant were very personable. I would definitely recommend Chris.