We're an Experienced Roofing Contractor RESIDENTS OF PASCO, WA AND BEYOND RELY ON US Columbia Roofing, Inc. is a preferred roofing contractor in the Pasco, WA area. Our satisfied customers appreciate our: Affordable prices. We offer free estimates so you can make an informed decision. Timely responses.Our dedicated team responds quickly to install new roofs. Reliable services. We provide warranties because we're confident in our work. Licensed professionals. We're a certified roofing contractor with the Home Builders Association of Tri-Cities.