The Old Chemistry Building Rehabilitation presented a wide range of challenges requiring exceptional planning, coordination, and execution. Located in the heart of a prominent Cincinnati university, the site offered limited access, complex logistics, an aggressive schedule, and unpredictable weather conditions.

Rooftop Garden Hardscape Precision: This overview presents the completed rooftop garden as a series of interconnected planting beds, pathways, and precast concrete forms. Engineered lightweight soil supports diverse ornamental plantings while minimizing imposed loads on the building structure. The angular planters and intersecting paver walks required close coordination among landscape, roofing, structural, irrigation, and building trades. Precise grading and material placement produced clean drainage paths and accessible circulation, allowing the technical rooftop assembly to function as a cohesive and visually distinctive outdoor environment.

Completed Rooftop Garden Overview: This overview presents the completed rooftop garden as a series of interconnected planting beds, pathways, and precast concrete forms. Engineered lightweight soil supports diverse ornamental plantings while minimizing imposed loads on the building structure. The angular planters and intersecting paver walks required close coordination among landscape, roofing, structural, irrigation, and building trades. Precise grading and material placement produced clean drainage paths and accessible circulation, allowing the technical rooftop assembly to function as a cohesive and visually distinctive outdoor environment.

Geometric Precast Planter Detailing: This view emphasizes the sharp geometry and consistent finish achieved at one of the rooftop garden's prominent precast planters. The triangular planting bed creates a strong visual axis through the space and required accurate setting of multiple precast components, paver courses, and planting limits. Uniform joints, level coping surfaces, and clean transitions demonstrate the quality-control measures maintained during installation. The established plant mass softens the architectural form while preserving the deliberate geometry that defines the rooftop design.

Specialized Rooftop Material Handling: This construction photograph documents the specialized process used to place heavy precast elements on the rooftop. Compact equipment, temporary protection mats, and controlled travel paths allowed the crew to transport components without damaging the roof membrane or exceeding localized loading limitations. Each element required coordinated rigging, positioning, and hand guidance within a restricted work area. The operation demonstrates the careful planning, equipment selection, and crew communication necessary to execute heavy hardscape work safely above an occupied university facility.

Coordinated Precast Placement Over a Protected Roof Assembly: This image captures Obersons' crew positioning a precast component within the developing rooftop garden. The work area shows protective layers, temporary access panels, drainage components, and adjustable supports that had to remain intact throughout construction. With little room for conventional equipment, crews relied on compact machinery and precise hand signals to guide each placement. The controlled installation sequence protected the underlying roofing system while maintaining the elevations and alignment required for the adjacent pavers, planters, and circulation routes.

Compact Equipment and Phased Rooftop Construction: This active installation view illustrates the constrained conditions encountered on the roof. Compact equipment was selected to maneuver heavy materials through limited work zones while distributing loads across temporary protection surfaces. Precast units, waterproofing layers, drainage infrastructure, and future planting areas had to be coordinated in a carefully phased sequence. By maintaining clear communication among operators and ground personnel, Obersons advanced production efficiently while safeguarding completed work and the building systems beneath the installation.

Rooftop Garden Infrastructure and Lightweight Soil Installation: This progress photograph reveals the technical infrastructure beneath the finished rooftop garden. Precast walls define the future planting beds, while engineered lightweight soil, irrigation components, drainage features, edge restraints, and paver supports are visible throughout the work area. Accurate soil depths and elevations were critical to meeting structural loading requirements and supporting long-term plant performance. The image demonstrates the extensive coordination hidden beneath the completed landscape and the importance of sequencing each layer before final planting and surface installation.

Imported Natural Stone and Unit Paver Integration: This finished detail showcases the natural stone imported from Canada and its integration with the surrounding unit-paver walkway and ornamental planting. The large stone pieces were individually selected and positioned to create informal seating and grade transitions while preserving their natural edges and color variation. Precise setting and elevation control allowed the rugged stone to meet the refined paver surface cleanly. The contrast between natural materials and structured paving gives the rehabilitated courtyard a distinctive character that complements the historic campus architecture.

Completed Courtyard Circulation and Landscape Integration: This broad view demonstrates how the project's hardscape and landscape components work together to create an accessible and welcoming campus courtyard. Unit-paver walks, concrete stairs, stainless-steel railings, imported natural stone, ornamental plantings, river rock, and pedestrian lighting are organized across a challenging change in elevation. Obersons coordinated each interface to maintain safe circulation and consistent finish quality. The completed space provides multiple routes through the site while transforming a narrow area between existing buildings into a visually rich outdoor environment.

Naturalistic Stone and Drainage Feature: This detail highlights the naturalistic dry-stream feature constructed beside the unit-paver walkway. Rounded river stone, large accent boulders, imported cut stone, and layered plantings create a gradual transition between the hardscape and the surrounding garden. The feature was carefully graded to support drainage while appearing fully integrated into the landscape design. Accurate stone placement and clean paver edges demonstrate the craftsmanship required to combine irregular natural materials with the project's precise architectural surfaces.

Craftsmanship in Canadian Stone Construction: This close-up reveals the texture, color, and workmanship of the imported Canadian natural stone. Each piece was selected, oriented, and set to create stable horizontal surfaces while retaining the material's rugged character. Tight transitions between the stone construction and adjacent unit pavers required careful layout, cutting, and elevation control. The resulting feature serves as both a functional site element and a distinctive visual accent that ties the landscape to the substantial masonry character of the surrounding historic buildings.

Completed Old Chemistry Building Courtyard: This completed overview captures the transformation achieved through the Old Chemistry Building Rehabilitation. A broad unit-paver promenade is framed by imported natural stone, layered ornamental plantings, canopy trees, accessible walks, stainless-steel railings, and integrated lighting. The composition balances the historic brick architecture with contemporary landscape detailing while providing clear circulation and comfortable gathering areas. Delivered through phased construction, limited access, weather challenges, and continuous coordination with other trades, the finished courtyard reflects Obersons' commitment to quality, durability, and the university's long-term design vision.