Should joints between layers of rubber tiles be staggered?

Where rubber tiles are laid in more than one layer, the joints in each layer should be staggered rather than positioned directly above one another. In a multi-layer build-up, each layer is offset from the one below so that the tiles in the upper layer bridge the joints in the layer beneath.

Staggering the joints in this way avoids joint lines running straight through the build-up and helps to keep the finished surface even. Outdoors, it also leaves no continuous path for vegetation to grow up from the ground beneath.