Restoring History: Ceiling Repairs Underway at Kentucky's Old State Capitol

The Kentucky Old State Capitol, a nearly 200-year-old National Historic Landmark, is currently undergoing critical restoration work following a recent ceiling collapse caused by water damage. This historic structure—considered the most historically significant building in Kentucky—is receiving expert care from John Canning & Company, a nationally renowned firm specializing in historic preservation.

The collapse occurred in one of the upper chambers, prompting an immediate assessment that revealed additional moisture-related damage. Recognizing the urgency and importance of the situation, the Kentucky Historical Society (KHS) swiftly mobilized to address the issue and protect the integrity of the building.

John Canning & Company brings decades of experience in historic preservation, with a portfolio that includes some of the nation’s most iconic landmarks such as the White House, the U.S. Treasury Building, the Sterling Memorial Library at Yale University, and the Mellon Auditorium. Known for their mastery of historic plaster, decorative painting, and architectural finishes, the firm has earned a reputation for blending traditional craftsmanship with modern conservation practices—making them an ideal partner for safeguarding treasured historic spaces like the Kentucky Old State Capitol.

Leading the plaster restoration efforts is John Canning Studios' Historic Plaster Restoration Division. Their skilled team is resecuring the ornamental plaster ceiling using time-tested methods. The process involves locating the original ceiling joists and marking them out. Technicians then install screws with metal plaster washers approximately every 12 inches, anchoring the plaster directly back into the joists to ensure lasting stability.

In areas where deep cracks have formed, the team is performing detailed repairs by opening the cracks, then filling them with a mixture of molding plaster and hemp. This traditional technique allows the plaster to bond securely, both structurally and aesthetically, with the original material.

Each room undergoing repair will take approximately three weeks to complete with a two-person crew, highlighting the careful and deliberate approach needed for such delicate work.

This restoration is part of a broader, long-term preservation plan for the Old State Capitol. As the largest artifact overseen by KHS, the building requires continual maintenance to ensure it remains structurally sound and historically authentic for future generations.

Thanks to the meticulous work of John Canning & Company and the stewardship of the Kentucky Historical Society, the Old State Capitol is well on its way to renewed strength—preserving its legacy as a cornerstone of Kentucky’s history.

For more information on the restoration team, visit: John Canning & Company.

Watch our interview below with Scott Campbell from John Canning & Co., Historic Plaster Restoration Division, as he explains the process.