I have Flagstone flooring in the house that was blackened and soiled particularly in the kitchen area. Darrel came out beforehand to inspect, advise and estimate the cost. He was good about explaining what he would do and the limitations due to defects in the condition of certain areas of the floor that existed. On the day of the job, he applied a pre-treatment cleaner, then used a high-pressure steam cleaning machine that easily lifted off most of the soil and grime, leaving a clean and fresh looking surface. Afterwards, he applied two heavy coats of water based, self-leveling sealer that gave the floor a nice, clean, even looking finish. Darrel is accommodating, thorough and very pleasant to work with. I also felt the cost was reasonable considering the quality results I highly recommend their services!