image of roof nails. as we peeled the layers away the damage was exposedso we removed all the bad wood and put in new pressure treated lumber and new plywood decking. rafters ready for purlins. particle-board-roof-decking-dscn5605jpg. waterproof deck coating for plywood. owens corning roof replacement \u0026 decking repair \u2013 hicksville, ohio. old skip sheeting in background and new cdx plywood laid to replace it.