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

Design-build window remediation at Nils Hasselmo Hall

**Posted:** October 20, 2026
**Respond By:** November 09, 2026
**Identifier:** 01-000-25-3505 Addendum 1
**NAICS:** 238150, 238190

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.

[View original listing](https://mbid.ionwave.net/PublicDetail.aspx?bidID=7597&SourceType=1)