University of Minnesota Ionwave #01-000-25-3505 Addendum 2

Design-build remediation of 24 Nils Hasselmo Hall window openings

The University of Minnesota is seeking a design-build contractor to remediate windows at Nils Hasselmo Hall on its Twin Cities campus. - Government buyer: University of Minnesota, Board of Regents; Capital Project Management (CPM). - Scope and quantities: West elevation work includes 12 ground-level punched-window openings and 12 Level 7 curtainwall daylight openings. Replace glazing, gaskets, and specified spandrel glass; retain existing aluminum frames and curtainwall grid; install new snap covers; and repair or reseal accessible and concealed joints. Salvage and reinstall exterior stone or granite as needed for access, and protect and reinstall applicable interior sills and shades. - OEMs and system references: Viracon (glass), Wausau (referenced gasket profiles and pressure-plate fasteners), and Alpana (existing curtainwall system) are named in technical records; the solicitation does not mandate a specific manufacturer. Referenced Wausau gasket profiles are 6183, 5141, and 5037; existing fasteners are #14 x 1 HWH stainless-steel machine screws. BWBR and WL Hall are also named in the window assessment materials. - Key requirements: Meet or exceed AAMA GS-001; provide a jointly issued 10-year system warranty covering labor, materials, access, and covered repairs. Coordinate independent air/water testing; contractor is responsible for corrective work and retesting after failures. Work must minimize disruption to the active research, classroom, and administrative building, with dust containment, interior protection, and engineered staging and lifting plans. Prevailing wages apply. - Budget and schedule: Project budget is $360,000. Mobilization is anticipated in spring 2027, with substantial completion required by late spring 2027. No option years or annual subscription are specified.

Description

The University of Minnesota is seeking design-build lump-sum services for targeted window remediation, glass replacement, gasket and sealant repairs, and exterior building-envelope stabilization at Nils Hasselmo Hall. Work is limited to failing windows on the building’s west elevation, including 12 ground-level punched-window openings and 12 Level 7 curtainwall vision-glass openings. The selected contractor will be responsible for design, engineering, permitting, procurement, construction, testing coordination, and warranty coverage. The building is an active research, classroom, and administrative facility, so work must be coordinated to minimize disruption.

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