Pioneer Millworks. Reclaimed FSC-certified flooring (such as flat-sawn heart pine, shown) is now available in engineered format, featuring a 4.8-mm reclaimed wood layer, FSC-certified domestic plywood, and formaldehyde-free glue. A range of recycled wood species is available, including ash, chestnut, oak, grey elm, maple, and jarrah. Fresh-sawn FSC-certified species also are available, along with siding reclaimed from old barns. 800.951.9663.