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A mass-timber pavilion is being included as part of the Willamette Valley Vineyards鈥� sparkling wine facility under construction in Dundee.

The new Domaine Willamette facility is perched on the hills of the Turner-based winery鈥檚 40-acre Bernau Estate adjacent to Oregon Route 99W. The two-story pavilion, designed by Scott Edwards Architecture, was a late addition to the project. The COVID-19 pandemic led to increased demand for outdoor seating, so the partially enclosed pavilion will provide roughly 80 seats.

The pavilion features a roof and beams made of Freres Engineered Wood mass-plywood panels. It is Scott Edwards Architecture鈥檚 first mass-plywood design, and it was nearly an instant decision for the firm to work with the material, architect Rebecca Littman-Smith said. Construction of the 17,530-square-foot main facility had begun and the pavilion鈥檚 completion needed to be timed with its opening.

On top of that, the 3,200-square-foot pavilion needed to be nestled between the Domaine Willamette facility and a small dwelling. Mass-plywood panels鈥� reputation for quick and easy installation, Littman-Smith added, was 鈥渄efinitely鈥� one of the selling points.

All 14 panels were prefabricated off-site at Freres鈥� facilities in Lyons and trucked to the project site. Kenny Hise, owner of KHC General Contractor, said it took four hours to fill the roughly 4,000-square-foot roofing area, which overhangs the pavilion鈥檚 main structure by about 600 square feet.

It was Hise鈥檚 first time working with mass-plywood panels, he said.

鈥淭hey went in just the way they told it would,鈥� he added.

The pavilion will feature concrete slab flooring, steel columns, vertical cedar siding and fiber cement panels that will be painted to match the main building. The ground floor will have seating able to accommodate large groups and the upper level will have an outdoor fireplace and lounge.

A big takeaway from working with mass plywood, Littman-Smith said, was understanding the manufacturer鈥檚 capacity 鈥� particularly regarding maximum and minimum dimensions. That allowed the team to avoid material waste as best it could, she added.

For the panels, the design team worked with an 8-foot-wide module 鈥� the standard width of a plywood sheet. This also meant that using multiples of 8 feet worked for the splines that would connect the mass-plywood roof panels to each other. The panels鈥� length was decided by what could fit on a truck, which ended up being 38 feet.

鈥淭rying to optimize our design spacing/span to the materials feels like it should just be commonplace, but it鈥檚 surprisingly not always taken into account to minimize waste.鈥� Littman-Smith stated later in an email.

After a nine-month hiatus due to the pandemic, construction of the Domaine Willamette facility restarted not long ago. It鈥檚 expected to wrap this month.

Completion of the pavilion is expected to follow in late fall or early winter.

鈥淔or something that was kind of put in at a later (time) because of the changes with COVID,鈥� Littman-Smith said, 鈥淚鈥檓 really hoping that it has a special and unique feel to it and doesn鈥檛 really feel like an afterthought.