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Foot Print

This is a typical footprint that was embedded in an old slab where the contractor was not aware that the floor would be polished.

A Concrete Polisher can try to grind down further over a footprint but in some instances a footprint might have pushed down stone to over 20 or 30mm.

In the example below we were able to hide the heel of the print however the front part of the foot is still visible as the aggregate was pushed down deep. To continue to grind further creates an uneven surface and may start to expose re-enforcing mesh that was embedded in the original slab which can create another problem.

Footprints must be treated carefully and the appearance of less aggregate sometimes cannot be avoided.

If pouring a new slab a contractor with experience will not leave any footprints. See our "Tips for contractors" for more info or Call Before Your Pour!

Image one - Footprint impression at 5mm (typical level of grind)

Image two - Same footprint at 10mm

Image three - Same footprint at 15mm

 
 
 
 
 
This case study shows how important it is to use a qualified concretor who knows the importance of producing a level slab without the blemishes of footprints and other inconsistencies. At 15 mm the footprint is still visible. To grind down this far creates other issues with visual inconsistencies of the level of the slab and water pooling etc.
 
In some cases a footprint may still be visible at 50mm. Grinding down to far can expose mesh and will go beyond engineering standards.