About Us

Cass Shumsky Overhead Garage Door Corporation has been serving the Merrimack Valley and Southern New Hampshire for over 20 years. We are factory approved dealers dedicated to the highest quality workmanship attainable. All of our technicians and field representatives are professionally trained, and have committed to treating our customers equally with kindness, courtesy, and respect.

Shumsky Door specializes in Residential and Commercial overhead doors and openers:

• Insulated steel
• Wood
• Vinyl
• Carriage house
• Rolling Steel overhead doors
• High Speed rubber roll-up doors
• Dock levelers, shelters, bumpers, and equipment
• All Electric Openers

We are fully equipped with service vehicles and stock all of the commonly used parts and hardware for your overhead garage door. Our commercial truck includes an electrically operated scissor lift for fast, economical service in all types of industrial situations