GDC Completes Slate Maintenance & Historical Copper ridge replacement at Holy Trinity Greek Orthodox Church Concord, New Hampshire

Amherst NH

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GDC always has a fully stocked inventory of all slate for our projects!

GDC is preserving New Hampshire’s Historical municipal buildings with beautiful result!! Preserving history for our future generations. 💪 GDC Slate & Copper, the benchmark in historic restoration of Slate & Copper roofs!

All details of our work for the USN is classified however we are proud to support our military in Slate, Copper & Historical restoration projects

Our Slate proprietary Slate guard system developed for the US Navy to meet both historical and personnel protection requirements our guard systems prevent falling Slate from causing damage to property & injuries. We have options in Copper, brass, stainless, aluminum & steel depending on the needs of our clients.

Slate Copper St Patrick’s

A beautiful access with our 92’ Z Boom. Incredible equipment operating skill by Jonathan Salisbury Supervisor GDC Aerial Division 💪

Coppersmithing in Bow NH

GDC Slate awarded Slate & copper maintenance of historical Slate roof on St Patrick’s Church Nashua NH Awarded 2025

GDC will perform Slate maintenance, copper maintenance, carpentry & masonry in historical restoration of Jack Buckley Commons building...

Slate maintenance in progress on Squam Lake Holderness NH