Commercial Roofing Installations in Pennsylvania, New Jersey, Delaware, and Maryland
Pennsylvania Public Entity? Skip the Bid.
GSM Roofing is a registered COSTARS supplier (No. 008-E23-1112). Pennsylvania school districts, municipalities, county governments, and state agencies can hire us directly without a competitive bid. Learn more about our affiliations and certifications.
Every commercial roof application has its advantages and disadvantages — but one thing’s for sure: there is a perfect roof for your structure. Whether it’s a low-slope roof, a steep-slope roof, a historical building, or other specialty application – trust the roofing contractor who’s been doing this for over 75 years. GSM Roofing proudly serves New Jersey, Delaware, most of Maryland, and Pennsylvania, from Philadelphia and Bucks County to Allegheny County and everywhere in between.








