Phase I (2020): Exterior Masonry Restoration
- Cleaning and repair of limestone and granite masonry on the historic façade, plaza walls, and steps
- Cleaning methods:
- Use of mild, environmentally friendly detergent and biocide
- Alternating cycles of hand scrubbing and low-pressure wash and rinse
Masonry repairs:
- Repointing of failed mortar joints
- Fracture and shard repairs
- Stone patching
- New lead T-joint and sealant installation
- Retooling and re-polishing of granite
Phase II (2020): Emergency Restoration and Graffiti Removal
- Response to damage from civil unrest on May 30, 2020
- Immediate cleanup efforts
- Long-term restoration campaign:
- Restoration of damaged windows
- Safe removal of extensive graffiti from limestone, granite, and bronze surfaces
- Specialized techniques:
- Collaboration with top conservators for trial tests
- Implementation of laser cleaning in combination with other techniques
- Additional work:
- Select glazing repairs
- Upgrades and replacements of faulty window glazing on original steel windows
Phase III (2023-ongoing): Rooftop and Structural Repairs
- Extensive brick masonry restoration of rooftop-level parapet walls
- Replacement of all window lintels with new hot-dipped galvanized lintels
- Partial dismantling and reconstruction of high parapet walls to facilitate:
-
- Repairs of internal structural steel beams and columns
- Addressing moisture infiltration issues
- Repairs of internal structural steel beams and columns
- Replacement of fourth-floor balcony flat-locked copper roof on the south elevation
Phase IV (Planned through 2025): Metalwork Assessment and Restoration
- Assessment and repair recommendations for:
- Historic bronze doors on the south elevation
- Cast-iron door surrounds on the north elevation
The Tradesmen Group has demonstrated exceptional capability in managing and executing complex, multi-phase restoration projects over extended periods. This project showcases our ability to adapt to unforeseen circumstances, implement a wide range of specialized restoration techniques, and maintain consistent quality across various project phases.
Key aspects of TTG’s role included:
- Execution of diverse restoration techniques for different materials (limestone, granite, bronze, brick, copper)
- Rapid response and adaptation to emergency situations, as demonstrated in Phase II
- Collaboration with expert conservators to develop innovative solutions for challenging restoration issues
- Balancing structural repairs with preservation of historical integrity
- Long-term project management and coordination across multiple phases and years
This project underscores TTG’s commitment to preserving America’s architectural heritage through comprehensive, adaptive, and innovative approaches to restoration. Our ongoing successful execution of this multi-phase project further solidifies our position as a leader in complex historic preservation, capable of addressing diverse challenges while maintaining the highest standards of craftsmanship and historical respect over extended periods.
