Seattle City Hall (SCH) Roof and Windows Replacement

The City of Seattle is seeking a qualified contractor to perform extensive roof and building envelope work on Seattle City Hall. The scope includes removal and replacement of existing roofing systems, installation of a new green roof, waterproofing, roof drainage repairs, replacement of curtain‑wall window panels, and installation of fall‑protection and bird‑deterrent systems. Work must be coordinated to keep the building fully operational, with security clearances required for all personnel. The project also involves selective demolition, salvaging of existing materials, and compliance with multiple Seattle building, fire, and energy codes. • Reroofing of multiple roof types (RT‑1 through RT‑5) with options for PVC membrane, surface‑applied glaze, and waterproofing augmentations. • Replacement of 13 curtain‑wall window panes on the south elevation. • Installation of fall‑arrest anchors, guardrails, and bird‑deterrent systems on all roof levels. • Green roof removal, irrigation system replacement, and new roof protection courses. • Coordination of site access, temporary barriers, and traffic control in a downtown location. • Required background checks, fingerprinting, and security badge for all workers.