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About Us

M.J. Dalsin

At MJ Dalsin our customers come first. We are the leader that is looked upon for roofing, repairing and maintaining commercial low-slope roofs and sheet metal fabrication. We are versatile enough to install EPDM rubber, TPO, PVC or sheet metal for your needs or to service nearly any type of flat roof.

We have made a strong presence in our industry and are continuously striving to offer the best results to our customers. Our experience with nearly all types of roof systems has made us become one of the top roofing companies in the nation. We also fabricate our own sheet metal for roofs and wall panels for practically any size project.

MJ Dalsin is proud of its long-standing relationship with national roofing manufacturers. We have achieved certified installer status with Carlisle, Firestone, Johns Manville, GAF and Sarnafil to name a few. These state-of-the-art materials are now recognized as a standard in the roofing industry. But we haven’t stopped there…we are continually “reinventing the wheel” and fine-tuning their products to meet the needs of all our customers—including you! With ongoing recognition from Carlisle as an ESP contractor and the satisfaction of our customers, MJ Dalsin continues to lead the commercial roof business.

Our central location in Sioux Falls, South Dakota allows us to provide professional roofing and sheet metal service around the United States.

If you have any questions or concerns, please don’t hesitate to contact us at any time.

We look forward to hearing from you soon!

M.J. Dalsin A Tradition Since 1912.