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Founded 1985 • Angie's List since August 2010

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When it comes to industrial and commercial roofing, Cosam Contracting of Tiro, and Portsmouth, OH is the name to know. We specialize in single-ply membranes for roofing systems, using cutting-edge technology to your advantage. Contact our locally owned and operated company today to discuss your specific project demands. Two locations to serve you better....

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Black Diamond Renovations, LLC

We take great pride in our extreme professionalism, timeliness and superior customer service on every job. We develop lasting relationship so that the next time service is needed there is no question on who to call. Satisfaction is guaranteed! Call us today!

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Services Offered

Commercial Roofing Repair, Commercial Roofing Maintenance, Commercial Roofing Inspection, Roof Replacement, Flat Roof Experts, Roof Coating, New Construction, Storm Damage, Emergency Repair, Gutters, Service and Install Metal, Single-Ply Membranes, Roof Coatings, Rubber, TPO, Tile, and Slate roofs.

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