Replacing Damaged Sections of Your Porcelain Slate Tile Floor Replacing Damaged Sections of Your Porcelain Slate Tile Floor

What You'll Need
Replacement tiles
Tile adhesive
Grout saw
Putty knife
Rubber float
Mild detergent

Porcelain slate tile is an excellent choice of material for flooring. The tiles are produced from extremely fine sand combined with clay and ground slate. Very high temperatures and pressure are used to cure the tiles. This produces a dense material with a high water resistance level suitable for exterior purposes. Stains do not develop easily on these tiles, which contributes to low maintenance requirements. Due to their hard properties, porcelain slate tiles have a high resilience and durability. However, damage by heavy impact is still possible. You can replace damaged sections of the floor with the help of the guide below.

Step 1 – Remove Grout

Use a grout saw to remove the grout around the damaged tiles. Use short strokes to scrape back and forth into the grout. Be careful not to damage the surrounding tiles as you scrape. You also need to make sure you do not saw into the substrate below. Remove as much of the grout as you can all around the faulty tiles.

Step 2 – Dislodge Damaged Tile

Insert the tip of a chisel at one point along the edge of the tile. Hold the chisel at an angle of 45 degrees. Hit the chisel at the back with a hammer. Use moderate pressure to tap the chisel so that it moves slightly underneath the tile. Once you make a slight entry, remove the chisel and place at another point about 3 inches away from the previous point. Repeat the action with the hammer. Work this way all around the tile to help loosen it from the substrate. Pry the loose tile from the substrate with your chisel. Proceed to remove other damaged tiles in the same way.

Step 3 – Remove Debris

Use a putty knife to scrape mortar and debris from the area. Dampen a rag with water and wipe the area. Let the site air-dry for about 1 hour.

Step 4 – Apply Adhesive

Spread an even coat of adhesive, about 1/8 inch thick, on the floor. Distribute the adhesive with your putty knife. Take a new tile and attach to the adhesive. Firmly press the tile all around so that it attaches to the mortar properly. The adhesive should cure properly overnight. Install tiles in other areas in the same way.

Step 5 – Apply Grout

Be sure to obtain a grout that matches the grout on your floor. Mix grout as outlined in the product instructions. Use a rubber float to apply grout around the newly installed tiles. Carefully wipe away excess grout with a damp sponge. Leave the grout to set for 24 hours.

Step 6 – Mop the Floor

Prepare a solution of water and mild detergent in a bucket. Use a mop to clean your newly repaired floor.


  • It is a good idea to purchase some extra tiles during initial installation. These will prove to be useful for future repairs. Sometimes it may be difficult to obtain tiles that match exactly with what you have at home.

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