Do grass or weeds grow in the joints of rubber granule tiles?

Grass and weeds can grow in the joints between rubber crumb tiles if the tiles are laid using plastic pins and the joints remain open down to the sub-base. The gaps can be closed during installation by bonding the edges of adjacent tiles together.

Even without bonding, weeds do not normally grow in the joints of tiles with a jigsaw interlock, whether visible or concealed, if the surface is used as intended and properly maintained. The joints are either too narrow for anything to grow in or do not reach the sub-base.

Whatever the joint type, keep the tiles and joints clean at all times to prevent unwanted growth from taking hold.