Diehl Concrete Rating (average): (1) Business Name: Diehl Concrete Category: Concrete Work Description: Concrete flat work services including driveways, stamped concrete patios, walkways and garage floors. Website: http://www.denvercustomconcrete.com Phone: (720) 277-3593 Suggested by: Richard Fassione Ratings There are no reviews yet. Ryan Diehl did the stamped and stained patio at our home. Incredible work. This guy is truly an artist. Unfortunately, I recently found out that he only bids on projects that are 1000+ sq ft now. If you have a large project, this guy's for you. Richard Fassione | June 23, 2020 Please login to rate this listing.