Control joints are planned in your concrete to allow for movements caused by temperature changes and drying shrinkage. If the concrete does crack, the cuts play an active role in controlling the crack along the control joint instead of randomly. Although this happens most of the times sometimes the concrete will still crack in other places.
We space the joints no more than 25-40 times of the slab thickness. A 100mm slab should have joints 2.5-4.0 m apart at a depth of 30% the depth of the slab. A 100mm thick slab should have expansion cuts at least 30mm deep. We cut expansion joints as soon as the concrete is hard enough that the edges abutting the cut don’t chip from the saw blade.
Decorative 10mm cuts can then be placed over the top of this control joint and at other intervals to give the tile effect
Grouting is done to fill the 10mm decorative cutting that is done to achieve a flagstone paver look, at a fraction of the price. We use a specifically designed tool that compresses the grout into the cut lines, leaving a consistent, smooth finish. Grouting is the best look for your 10mm concrete cuts and prevents the cuts from filling with dirt and weeds. We use the correct Concrete Construction Grout to insure your job is completed to a high standard.