Nail Installation: Not preferred, but an occasional nail can be used in conjunction of glue down method when over plywood only.
Floating Installation: Not allowed
Wood Species: Walnut
Grade: Light Rustic [frequent knots and character markings approx. every 12” and with knots up to 4” allowed, may contain small surface/face cracks, open knots and cracks that show the substrate will be filled, and all other knots and cracks will be left open unless specified]