Video How Hardwood Flooring is Made at Advantage Lumber May 25, 2013 | 2:08 pm EDT Comments Advantage Trim & Lumber's Los Angeles base, where it is opening Wood Decking Inc. in Santa Fe Springs. 1 2 3 4 5 6 7 8 9 10 11 Lumber, flooring, trim and decking manufacturer Advantage Trim & Lumber, explains how hardwood flooring is made. The wood products firm has been expanding. Have something to say? Share your thoughts with us in the comments below.