T1-11 plywood sheets are available in 48-by-96-inch or 48-by-120-inch sheets. Sheet thickness is either 3/8, 5/8 or 3/4 inch. T1-11 is available with a rough-surfaced, textured finish or a smooth, sanded finish. The choice between the two is determined by aesthetics. This smart wood exterior siding panel is a great way to cut back on installation time and cost. Wood is an abundant and available source of siding, so replacement is quick and easy in the event of damage. The plywood product is a little more expensive but is far superior to the OSB variety because of its greater durability and expanded finishing options. Plywood T1-11, also known simply as plywood siding, can be stained if you’re looking for a natural wood look, or it can be primed and painted as well. G1S (Good One Side) Plywood panels have a sanded smooth finish on one side which can be finished with paint, stain or polyurethane. These panels are economical and convenient for repair work and small projects.