How To Tile Over Cinder Block

How To Tile Over Cinder Block: A Comprehensive Guide

Tiling over cinder block is a project that requires careful preparation and execution to ensure a durable and aesthetically pleasing finish. Cinder block, also known as concrete block, is a porous material that can absorb moisture and cause problems with adhesion if not properly prepared. By following the steps outlined in this guide, you can successfully tile over cinder block and achieve a professional-looking result.

Step 1: Surface Preparation

The key to successful tiling is proper surface preparation. Start by removing any existing paint, dirt, or debris from the cinder block surface. Use a wire brush or power washer to clean the surface thoroughly. Allow the surface to dry completely before proceeding.

Next, apply a bonding agent specifically designed for cinder block to the surface. This will help create a strong bond between the tile and the cinder block. Allow the bonding agent to dry according to the manufacturer's instructions.

Step 2: Setting Up a Level Surface

Ensure that the cinder block surface is level before tiling. Use a level to check the surface in both directions and make any necessary adjustments by adding or removing mortar underneath the cinder blocks. A level surface will prevent tiles from sagging or buckling over time.

Step 3: Laying the Tile

Spread a thin layer of thin-set mortar over the prepared surface using a notched trowel. Hold the tile at a 45-degree angle and gently press it into the mortar, twisting slightly to ensure proper adhesion. Use spacers to maintain a consistent gap between the tiles.

Continue laying the tiles, working from the bottom up and ensuring that each row is level. Use a level and a tapping block to adjust the tiles as needed. Wipe away any excess mortar that squeezes out from between the tiles.

Step 4: Grouting

Once the tiles are set, allow the thin-set mortar to cure for 24 hours. Then, apply grout to the joints between the tiles using a grout float. Work the grout into the joints, making sure to fill them completely. Remove any excess grout from the surface of the tiles with a damp sponge.

Step 5: Sealing

After the grout has dried, apply a penetrating sealer to the tiles and grout. This will help protect the surface from stains and moisture. Allow the sealer to dry according to the manufacturer's instructions.