The sheets are very easy to cut. One way which works well is with a box cutter knife with the blade extended. Cut with the geotextile up to reduce shaggy edges if the geotextile is on the far side. Fine tooth saws and power saws are fine too, as are serrated bread knives! They are very easy to cut, the plastic in the matrix is only 1.2mm thick plastic. Each sheet is made of a number of smaller grids welded together. The join double thickness so with a box cutter you have to gnaw the knife a little, but it is quick and simple.