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How to Install Stone Tiles on an Existing Chimney

Posted on November 26, 2023

How to Install Stone Tiles on an Existing Chimney

You can install stone tiles to give your old chimney a new look. Stone tiles are thin pieces of natural or manufactured stone that can create a beautiful and durable surface. Here are the steps to install stone tiles on an existing chimney:

Prepare the Chimney

It would help if you cleaned the chimney of any dirt, dust, debris, vines, nests, or flaking areas. You can use a wire brush, a scraper, and a hose to do this. You must also inspect the chimney for any cracks or damages. Use mortar or caulk to fill in any gaps or holes.

Choose the Stone Tiles

You can find stone tiles in various colors, shapes, sizes, and textures. Choose natural stone tiles, such as slate, granite, marble, limestone, or manufactured stone tiles made of concrete and pigments. Mix and match different stone tiles to create a unique pattern. Before selecting your stones, measure the area of your chimney and buy enough stone tiles to cover it, plus 10% extra for waste and cuts.

Apply the Mortar or Adhesive 

You need to use a particular type of mortar or adhesive suitable for stone tiles and outdoor use. Find these products at your local hardware store or online. Follow the manufacturer’s instructions on how to mix and apply the mortar or adhesive. Generally, you need to spread a thin layer of mortar or glue on the back of each stone tile with a trowel and press it firmly onto the chimney wall. You must start from the bottom corner of the chimney and work your way up, leaving about 1/4 inch of space between each tile for grout.

Cut and Fit the Stone Tiles 

You need to cut and work the stone tiles around the corners and edges of the chimney with a wet saw or a grinder. You need to wear eye protection and gloves when doing this. It would help if you also made sure that the stone tiles are level and aligned with each other. You can use a level, a tape measure, and a pencil to mark and adjust the stone tiles as needed.

Grout the Tiles

After the mortar or adhesive has dried, you must grout the stone tiles with a grout bag and a trowel. You must choose a grout color that matches or contrasts your stone tiles. It would help if you filled in the gaps between the stone tiles with grout, ensuring no air bubbles or voids. It would help to wipe off any excess grout with a damp sponge or cloth before it hardens.

Seal the Tiles

To protect your stone tiles from moisture, stains, and weathering, you must seal them with a stone sealer. You can find this product at your local hardware store or online. You need to follow the manufacturer’s instructions on how to apply and cure the sealer. Generally, you need to spray or brush the sealer on the surface of the stone tiles and let it dry for 24 hours.

Follow-up Care

Regularly clean and check your chimney to ensure no structural damage. Find a local masonry company to guarantee your chimney is in peak condition. Consider an inspection before you install the tiles. Once your tiles are installed, check them throughout the seasons and care for any damaged tiles as needed. Enjoy this beautiful addition to your home for years to come.




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