Derek did an amazing job on our pool deck. The deck "before" was moldy from an overhanging oak tree. The "after" looked like a brand new deck! Derek is courteous, ethical, professional and on time. He did not do a "rush" job by any means. He took the time to do the job right.He is very knowledgeable of all surfaces from roofs, pool decks, driveways, as well as painted surfaces. Based on the surfaces to be cleaned, he recommends the appropriate services for the job. His chemicals won't leave you with dying grass or plants.We will use him again and again.