# Washington County Ionwave #ENG-26-09 Addendum 3

Washington County 540 Western Maryland Parkway Roof Replacement

**Posted:** September 25, 2026
**Respond By:** October 28, 2026
**Identifier:** ENG-26-09 Addendum 3
**NAICS:** 238160

Washington County is seeking a contractor to replace the roof at its 540 Western Maryland Parkway facility in Hagerstown.
- **Government buyer:** Board of County Commissioners of Washington County, Maryland, through the Division of Engineering; the County Project Manager is identified as the project office contact.
- **Project:** Roof Replacement Project, Contract MS-PR-328-28 (ENG-26-09), at 540 Western Maryland Parkway, Hagerstown, Maryland. Estimated contract value: **$500,001–$1,000,000**.
- **Roof system and named manufacturers:** The basis of design is **Sika’s Sarnafil S327 80-mil RhinoBond PVC roofing system**. **Johns Manville (JM)** and **Verisco (Verisflex)** are named as potential alternative system manufacturers; proposed alternatives require documentation demonstrating equivalency. **Hickman** is specified for the TerminEdge EX coping assembly.
- **Main work and materials:** Replace approximately **102,768 square feet** of existing EPDM roofing with a true 80-mil mechanically attached PVC system. Add 1 inch of polyisocyanurate insulation over existing 4-inch insulation, plus high-density cover board, to achieve at least R-30 overall. Provide a continuous 30-inch-wide PVC walkway.
  - Remove skylights and infill openings with matching Type-B, 22-gauge metal decking. Remove and recycle or legally dispose of the existing membrane.
  - Remove abandoned rooftop mechanical equipment, electrical items, and vent pipes; make safe, cap or dispose of items as applicable, and pump down refrigerant before cutting refrigerant lines where required.
  - Install **Hickman TerminEdge EX** two-piece wall copings with an extruded aluminum anchor bar and 24-gauge Kynar-finished steel fascia. Existing roof drains remain, with an 8-foot sump at each drain.
  - Provide installed contingency unit prices for 4-by-8-foot-by-2-inch polyisocyanurate insulation sheets and 4-by-8-foot Type-B, 22-gauge metal decking sheets. Quantities for these contingency materials are not specified.
- **Notable technical and warranty requirements:** The roof system must meet wind-uplift requirements for Risk Category IV buildings under the 2021 International Building Code and accommodate curbs as low as 3 inches while preserving the manufacturer warranty. Include a 30-year manufacturer warranty and a five-year general-contractor workmanship warranty.
- **Performance period:** The bid documents state that work must begin within 10 calendar days after the Notice to Proceed and be completed within 60 consecutive calendar days. Other bid materials describe a later anticipated completion window, so the schedule should be confirmed against the final contract documents. No recurring subscription or option years are indicated.
- **Other vendor named:** Washington County is the buyer; no reseller or distributor is identified. The attachment also describes independent contractor work or services but does not name a service vendor.

### Description

The project replaces approximately 102,768 square feet of existing EPDM roof membrane with a true 80-mil, mechanically attached PVC roof membrane. Work includes adding polyisocyanurate insulation and high-density cover board to provide a minimum overall R-30 value, removing skylights and infilling openings with metal decking, and removing abandoned rooftop mechanical equipment, electrical items, and vent pipes. The scope also includes a continuous PVC walk path and replacement of all wall copings. The existing roof drains remain in place, and the contractor must recycle or legally dispose of the existing EPDM membrane.

[View original listing](https://washco-md.ionwave.net/PublicDetail.aspx?bidID=529&SourceType=1)