The borders must be completely set in a mortar bed, or ‘mud-set’, with a permanent spacer inserted between the border and the field cut piece. This important step ensures that the pavers are properly aligned and that the installation maintains its structural integrity over time. Years of hands-on testing and development have led us to design a fail-proof system, where the borders play a significant role, especially for driveway installations. An alternative solution is the use of the Fortress StrypRail Geo-Tension Restraint System. This system serves as a reliable alternative for installations where a conventional mud-set border may not be suitable. You can find more information here.