Polished Concrete Overlay Produces Showroom Quality

TTM Finishes Inc. installed an Ardex PCT polished concrete topping at Aritzia store at Lime Ridge Mall in Hamilton, Ontario.

An example of some of the height discrepancies in the floor. The high spots were taken down with a scarifier and Diamatic 780 grinders.

The floor after initial grinding to remove much of the underlayment. The visible patches are areas with remaining patch materials or simply holes and areas that were cut out and filled at some time over the last 30 to 40 years. The floor was full of patches.

Trenches in the floor waiting to be filled and repaired.

Applying the first coat of Ardex’s MC Rapid Moisture Barrier Epoxy. The epoxy is black so applicators can ensure spots are not missed.

The floor is divided into five sections. Even though they are long (about 100 feet), pouring narrower sections allows you to have better control of the concrete overlay material.

Crews mix small 2 bag batches of the Ardex PC-T (Polished Concrete Topping) overlay by hand to get good consistency.

Crews use a hopscotch method to apply the overlay, which consists of pouring the end and middle sections first and then the second and fourth sections. It took about an hour to pour each aisle.

Gage rakes are used to pull the overlay across the surface. Marco Chiesa, owner of TTM, follows the rake with a spiked roller to pop any air bubbles and break the surface tension of the overlay material so that it lays out smoothly with a uniform surface for polishing.

Gage rakes are used to pull the overlay across the surface. Marco Chiesa, owner of TTM, follows the rake with a spiked roller to pop any air bubbles and break the surface tension of the overlay material so that it lays out smoothly with a uniform surface for polishing.

Measurements are taken throughout the pour.

A crew member uses an HTC 500 machine equipped with Fenix Pads to remove densifier film and polish the overlay.

The finished floor exhibits mirror-like qualities.

This polished concrete floor reflects Aritzia fashion boutique’s casual, lounge-like atmosphere.

The client was very happy with this polished concrete floor, says contractor Marco Chiesa.

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