Flatline Concrete Grinding is a Phoenix, AZ-based concrete contractor owned and operated by Kerry Burkart, who has more than 20 years of hands-on experience in the concrete industry. The company is licensed under ROC214703 and carries bonding and insurance on every job. Flatline handles concrete grinding, scarifying, asphalt grinding, trip hazard concrete repair, concrete floor leveling, sidewalk remediation, concrete polishing, concrete repair, grind and seal, foundation repair, and flooring demo and prep. Work ranges from small trip-hazard... read full review »