Weyerhaeusers Pro Series Lumber, part of the companys iLevel line, carries a Green Approved rating from the National Association of Home Builders Research Center for use under the National Green Building Standard. All pieces are also certified to the Sustainable Forestry Initiative standard. Weyerhaeusers proprietary technology and quality-control checks remove boards that have a greater tendency to eventually crook, twist, or bow, and Pro Series Lumber is treated with a mold inhibitor to help it stay clean and bright. ilevel.com

Weyerhaeuser’s Pro Series Lumber, part of the company’s iLevel line, carries a Green Approved rating from the National Association of Home Builders Research Center for use under the National Green Building Standard. All pieces are also certified to the Sustainable Forestry Initiative standard. Weyerhaeuser’s proprietary technology and quality-control checks remove boards that have a greater tendency to eventually crook, twist, or bow, and Pro Series Lumber is treated with a mold inhibitor to help it stay clean and bright. ilevel.com