University of Minnesota Ionwave #01-000-25-3505 Addendum 1

Design-build window remediation at Nils Hasselmo Hall

The University of Minnesota seeks a design-build contractor to remediate windows and stabilize the exterior envelope at Nils Hasselmo Hall. - Buyer and location: Board of Regents of the University of Minnesota; Capital Project Management and Facilities Management; Twin Cities campus, Minneapolis. - Requested work: Replace glazing in 12 ground-level punched-window openings and 12 Level 7 curtainwall daylight openings on the west elevation. Retain existing aluminum frames and curtainwall grid; replace Level 7 spandrel glass while retaining its insulation backing; replace exterior gaskets; install new snap covers in place of existing pressure plates; and repair and reseal sealant joints and internal zone dams. - Related work: Carefully remove and salvage exterior precast stone or granite as needed to access concealed joints, and protect, salvage, and reinstall applicable interior window sills and shades. Design-build responsibilities include engineering, drawings and submittals, procurement, installation, logistics, and coordination of testing. - OEMs and product references: Viracon was contacted about glass makeup; Wausau products are referenced for glazing, nose gaskets, and pressure-plate fasteners; Alpana is identified as the existing curtainwall system. These are contextual references, not stated mandatory brands, and no part numbers are specified. The supporting study also names BWBR and WL Hall; no bidding contractor or reseller is identified. - Key requirements: Meet or exceed AAMA GS-001 and provide single-source performance responsibility for the window, glazing, gasket, and joint-caulking scope. The contractor, installer, and sealant manufacturer must jointly provide a 10-year system warranty covering labor, materials, access or scaffolding, and structural repairs for covered failures. The University will arrange independent air/water testing of 2% of installed openings; the contractor is responsible for coordinating testing and for corrective work and retesting if a test fails. - Occupied-site conditions: Minimize disruption to active research, classroom, and administrative operations; provide dust containment and interior protection; and engineer and coordinate staging and lifts to protect structural slabs. Prevailing wage requirements apply. The limited asbestos survey found no asbestos-containing materials in the sampled exterior window sealants, gaskets, and tapes; dust-minimizing precautions are recommended. - Budget and schedule: The stated project budget is $360,000. Construction is anticipated to begin in spring 2027, with substantial completion required by late May 2027. No option years or recurring subscription are stated.

Description

The University of Minnesota is requesting proposals for design-build lump-sum services for targeted window remediation at the West Elevation of Nils Hasselmo Hall. Work includes glazing replacement, gasket and sealant repairs, and exterior building-envelope stabilization, covering 12 ground-level punched window openings and 12 Level 7 curtainwall daylight openings. The selected contractor is responsible for design, engineering, shop drawings, permitting, procurement, construction, field-testing coordination, and warranty coverage. The work must be coordinated to minimize disruption at the active campus facility.

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