University of Minnesota Ionwave #01-204-24-2839A Addendum 3 (Wilson Library Waterproofing)

University of Minnesota Wilson Library Plaza Waterproofing Repairs and Construction Services

The University of Minnesota is seeking qualified contractors to provide comprehensive waterproofing repairs and related construction services for the Wilson Library Plaza on the Twin Cities campus in Minneapolis, MN. - Government Buyer: - University of Minnesota, Twin Cities Campus - Project Scope: - Replacement and installation of horizontal and vertical waterproofing systems at the basement level - Restoration of interior finishes damaged by water infiltration (walls, ceilings, vapor barriers, fireproofing, lighting) - Renovation of concrete paving, landscape, and hardscape (including alternates for additional landscaping and structural soils) - Demolition, substrate preparation, and installation of new waterproofing systems - Salvage and reinstallation of existing stone base - Installation of Hess City Elements light poles and allowance for 6 interior light fixtures - Replacement of 50 cracked stone units - Key Products and OEMs: - 80 mil thermoplastic sheet waterproofing membrane (Sika Corporation, Sikaplan WP 1130-20C) - Cold fluid-applied polyurethane waterproofing system (Sika Corporation, Sikalastic RoofPro WP 20) - Flexible self-adhering stainless steel flashing (York Manufacturing, York 304 SA) - Bentonite waterproofing composite sheets (Paraseal LG, Clay-Tite) - Hot fluid-applied rubberized asphalt waterproofing membrane - Molded-sheet drainage panels - Thermal insulation (polyisocyanurate foam board, mineral wool blanket/board) - Penetrating water repellents (BASF Hydrozo Silane 40 VOC, Degussa Protectosil Chem-Trete 40 VOC) - Hess City Elements light poles (Hess) - Unique/Notable Requirements: - Strict adherence to University of Minnesota Design Standards and environmental conditions - Compliance with prevailing wage requirements - Coordination with ongoing library operations to minimize disruption - Five-year minimum warranty on waterproofing systems (with some materials requiring up to 20 years) - Demonstrated contractor experience with similar waterproofing projects - University policies: smoke- and tobacco-free campus, zero tolerance for harassment and discrimination - Place of Performance: - Wilson Library, 309 S 19th Ave, Minneapolis, MN 55455 - Warranty Periods: - 5 to 20 years for waterproofing systems/materials, 2 to 10 years for workmanship, 2 years for water repellents

Description

The University of Minnesota is soliciting proposals for construction services to perform waterproofing repairs at Wilson Library, located on the west bank of the Twin Cities campus. The project includes replacing horizontal and vertical waterproofing at the basement level, restoring interior finishes damaged by water infiltration, updating concrete paving around the building, and renovating landscape and hardscape to the east of the building. The work must comply with University design standards and prevailing wage requirements, with a proposal submission deadline of April 7, 2026.

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