This CCA treated marine grade plywood has a B face and C bottom.  The top is sanded smooth but may have small knots and the bottom will have unfilled voids.  This does not effect the durability of the plywood, it just may not look as nice as you expect. These superficial blemishes will not effect the lifetime warranty on the plywood, it will be covered by carpet.

PontoonStuff always offers free shipping on plywood and decking kits! 

CCA treated plywood should not be coated or treated before installation and has 6 plys that have been pressed and glued together then kiln dried, it will not warp or rot.

This plywood is the best product to ensure you pontoon boat last another 20 years and is the same plywood used on most new pontoon boats.