Ram Board is made of 100 percent recycled materials and is certified as a green product by the FSC (Forest Stewardship Council). So, just what the environmentally conscious gardener would be ...

Remove the particleboard and screw the plywood to the floor joists with 1-5/8 in. drywall screws spaced every 6 in. Install a layer of 5/8-in. CDX plywood and screw it to the subfloor with 1-5/8 ...