One Frederick Street

Licenses and Services
MD State Journeyman Licensed Plumbers
Medical Gas Certification
Backflow Prevention Certification
Certified Welders
MD State Master Plumber License #7401
Maryland State HVAC License #5531
Steam and hot water boiler installation
Design and build plumbing systems
Perform pipe and duct work insulation
Complete refrigeration installation service
MD State licensed sprinkler contractor






One Frederick Street
R.H. Lapp & Sons, Inc. performed all mechanical work on a three-story professional building located in Cumberland, MD, for a contract price of $700,000. The general contractor on the job was One Frederick, Inc. of Snow Hill, MD.

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