Boise Cascade is the second largest softwood plywood manufacturer in North America. What's more, they have created a reputation for producing the finest plywood panels in the market. All of their plywood mills are certified by the APA Engineered Wood Association. The certifying ageny ensures consistent product performance. This is why we go to them to get our plywood panels. Boise Cascade manufactures rated sheathing in Western Fir and Southern Pine species. Their rated sheathing panels are 4’x8’ and are produced in thicknesses ranging from 11/32” to 1 1/8” depending on the mill.