Ground crack inducers have been used for many years to form an induced crack upwards. Many building products have been altered to achieve this and all are very labour intensive to construct.
Lesa's plastic Ground Crack Inducer is simple & quick to install, and best of all, very cost effective.
Connectors are also available to join the lengths together or at right angles in grids.
Available in two standard sizes 25 & 50mm with custom sizes and lengths on request.