Can I put Rubberific on top of my existing mulch?
The ideal way to install Rubberific is over a weed fabric. We recommend using a weed fabric and not a plastic material because plastic is not permeable. When installing Rubberific over a weed fabric, you will never have any weed problems and you won’t have to worry about previous mulch debris mixing in with the Rubberific Mulch. Rubberific Mulch can be installed over your previous wood mulch. If you do install Rubberific Mulch over existing wood mulch, make sure the wood mulch has had time to decay and become compacted.