Interlocking Concrete Pavement Institute (ICPI) Certification Practice Exam

In reinstatement, creating a bedding sand border along the edge helps re-establish a stable, uniform bedding plane and protects the edge as the new pavers are seated and compacted. The six to twelve inch width provides a practical buffer that allows enough sand to be placed and compacted right at the edge, supports proper seating and joint alignment, and minimizes sand loss during the work. A border that’s too narrow, like two to four inches, may not give enough material for a stable edge and proper compaction. A border that's too wide, such as eight to sixteen inches, adds unnecessary material and cost without delivering additional benefit in most cases. Six to twelve inches offers the right balance for effective reinstatement.