Great job on office stairwells and tile leading into the office building. He applied a non-slip stain over the tile outside that leads into the front door of our office. We see a lot of elderly patients and the non-slip stain has been great especially with the recent wet weather. The transformation of our stairwells is amazing! In the past we have had several people fall or almost fall down the stairs due to the slippery surface. Zack transformed the stairwell and since we have not had anyone slipping as well it is more appealing to look at, what a great job! Zack is professional, affordable, reliable and friendly.