PORTLAND — From its conception, the new mass timber roof at Portland International Airport was meant to evoke a walk through a Pacific Northwest forest. Wood for the impressive nine-acre, 9,000-ton roof came largely from sustainably managed forests in Oregon and Washington. …Construction of the roof is now completed, and installation is underway. …Similar to the farm-to-fork movement for food, mass timber embraces an ethos of “forest-to-frame,” changing the way people think about and relate to buildings. One of the project’s Oregon-based partners, Freres Engineered Wood, provided 73,527 cubic feet of mass plywood panels for Phase I… Tyler Freres, said he hopes mass timber will encourage policymakers to accelerate thinning of overstocked public forestland. “I think people are recognizing that we need to figure out the best way to build our buildings of the future,” Freres said. “I think wood is it, hands down.”