A restoration of the roof at the Portland Expo Center has diverted 83 tons of material from landfills, material that would have otherwise resulted from a tear-off of the 200,000 square feet of roof surface area for Exhibit Halls D, E and the Connector.
Working with Anderson Roofing, Tremco provided a 30-year warranty on the AlphaGuard product used to seal the roofing. By using the liquid applied roofing system under professional installation, the Expo Roof project evolved from a complete tear-off into an environmentally friendly and sustainable roof restoration project.
“The Expo Center Roof Restoration project is the largest of its kind in the Portland area. Metro saved $1,900,000 in expenditures and the equivalent of 240 dump truck loads of roof debris from going directly to the landfill,” said project manager Jesse Flores.
Flores works in Metro’s construction project management office and provided exceptional oversight of the restoration which was completed $500,000 under budget in a time when most construction costs are escalating exponentially. Sealing the roof for waterproofing continuity was ultimately both the most sustainable and strongest economic option for this public asset.
At the project kickoff, the Portland Expo and Metro project team instilled the value of diversifying construction and the trades to all companies who submitted a bid on the project. Of the four qualified roofing contractors in the area, Anderson Roofing Company was selected as the most qualified bidder for the project and secured veteran-owned COBID subcontractor, Stryker Sheet Metal, for the gutters and downspouts needed on the restoration. The team also worked with SEA Architects and Professional Roofing Consultants for oversight on the project.
“I am thrilled with the finished product and the efforts put forth by Anderson Roofing as our primary contractor to complete this project on time, and under budget. We were able to complete the project with zero impact to our events and seamlessly for our patrons over an 18-month period. Additionally, Tremco assisted Sterling Pacific with gaining their certification to become the first COBID contractor able to apply AlphaGuard on future roof restorations,” said Matthew P. Rotchford, Expo executive director.