Nitro Roofing & Construction

Dahm Brothers, Inc. was formed in 1928 by Paul and Bert Dahm. These ambitious brothers believed that by using the best materials available and employing a highly trained workforce their business would grow and thrive for many years.Thanks to their dedication and commitment to excellence and quality, Dahm Brothers has over 85 years of experience with generations of satisfied customers.

Covering Our Customers Since 1978.Welcome to Cotterman and Company, Inc. Since our inception in 1978, Cotterman and Company, Inc. has become an award winning leader in the Industrial and Commercial roofing industry specializing in New Construction, Re Roofs, Roof Repairs and Roof Maintenance Programs.Some of our services include: re-roof/new construction sheet metal fabrication 24/7 emergency response GPS roof drawings & infrared roof inspection preventative maintenanceWith over 75 qualified and dedicated employees, a fierce commitment to customer service, and offices in Dayton, Columbus, and Minster Ohio, Cotterman and Company, Inc. has developed a reputation for quality work, quick response time, professionalism. As well as getting the job done right, on time, and meeting or exceeding our customers expectations.Select Cotterman and Company, Inc. as your roofing specialist and enjoy a lasting relationship that will merit your continued trust and confidence.