We stock a large selection of plywoods in 1/4", 3/8", 1/2", 5/8", 3/4" and 1" thicknesses. Cdx plywood is often refered to as rough or sheating grade plywood. BC plywood is a good 1-side pine plywood product. AC plywood is a good 1-side pine or fir plywood product. Marine plywood is similar to AC fir plywood with fewer interior voids and face patches. The glue is stronger than regular plywood. Treated plywood is available in both weather resistant and fire resistant in Cdx, BC, AC and underlaymet grades.