*SOUTHERN YELLOW PINE* 3/4"-4'x8' CDX SYP PLYWOOD | Southern Yellow Pine CDX Plywood Sheathing is designed for excellent performance. It is perfect for all traditional plywood panel Sheathing applications. Use appropriate fasteners at the recommended schedule and gap panels 1/8" on the ends and edges of each panel. For Roof Applications; do not exceed the span limitations printed on each panel. Check local building codes for panel edge support requirements. Without edge support, you may need to decrease the support on-center spacing to less than the span rating of the panel. Check local code for requirements. Exposure 1 rated for limited exposure.