Matt Deloney, Mid-Continental Restoration Company, Inc.
Renae Kwon, Wiss, Janney, Elstner Associates Inc.
North Dakota State Capitol Exterior Envelope Restoration
The North Dakota State Capitol Exterior Envelope Restoration Project was a unique and challenging project where the majority of the work had to be executed at night within a six month time frame on a high rise structure in a windy region with difficult work scopes 900 miles away. The scope of work on this project was unique because the limestone joints had been previously sealed with a layer of asbestos containing sealant, and a layer of silicone sealant. These joints were to be repointed with mortar requiring the removal of both layers of sealant. The asbestos containing sealant presented challenges from an environmental concern, and the silicone sealant presented challenges for achieving adequate bond between the new mortar and limestone substrate. A careful process had to be followed to achieve successful installation. There were other challenges that had to be dealt with during this project, which will be shared during this presentation, including resetting 700 lb stones, 250 feet up on the building at night.