Commercial & Specialty Roofing Contractor 800-532-ROOF (7663)
Gradient Gradient Ready To Go Roofing Services
Gradient Gradient Built to Last Roof Types
Gradient Gradient Well Protected Building Envelope Products
Gradient Gradient Safe and Sound Roof Safety Solutions

Why GSM Roofing?

GSM Roofing is a private, family-owned, professional service company, specializing in the installation and maintenance of commercial and specialty roofing. We are known by our passionate dedication to customer service, commitment to our employees, support of our community and world-class professionalism. Our exceptional employees will deliver exceptional results while always striving to do the right thing.

Founded in 1946, we operate in the South Central & South Eastern PA, MD, DE and NJ region with a full scope of services that includes roof service & maintenance, re-roofing, new construction roofing, historic restoration and custom metal fabrication. GSM also offers roof safety solutions and other building envelope products. More


We believe the prevention of accidents and injuries is so important, that a safe working environment has precedence over productivity whenever necessary. To ensure we provide a safe working environment for ourselves, and customers, GSM employs a full-time and fully dedicated Safety Director. More

News + Videos

GSM Roofing Memory Marchers – Walk to End Alzheimer’s

The Lancaster Walk to End Alzheimer’s went very well! The weather was perfect, the donations were over the top and More

GSM Roofing 25 Year Club 2015

GSM Roofing is proud to announce that Tim Zimmerman has been inducted into our 25 Year Club. Tim is a More