How Do You Cover Tile Countertops With Thin Quartz?

Covering existing tile countertops with a thin quartz material is an attractive and cost-effective way to update the look of your kitchen or bathroom. With some careful planning and proper installation techniques, you can achieve a seamless, modern countertop surface. Here is a step-by-step guide on how to cover tile countertops with thin quartz.

Selecting the Right Quartz Material

When choosing a thin quartz material, opt for an engineered stone product that is at least 1/4 inch thick. Though thinner than a full slab, high-quality, 1/4 inch thick quartz offers durability and style. Look for a material with a flexural strength of at least 15 MPa. Flexural strength indicates how well the material resists breakage under pressure. A product with a high flexural strength will be more resilient.

Popular brands like Silestone, Caesarstone, Cambria, and Viatera all offer 1/4 inch thick quartz options. Select a color and finish that complements your existing tile and decor. Matte finishes hide scratches well, while glossy finishes offer a brighter, shinier look.

Preparing the Existing Tile Countertops

Proper prep work is crucial for a smooth installation. First, clean and dry the existing tile countertops thoroughly. Use a tile cleaning product to remove all grease, dirt, and soap residue.

Inspect the tile and grout lines closely. Any damaged, cracked, or missing tiles need to be repaired or replaced prior to installation. Re-grout any areas where the grout is cracked or missing.

For the quartz to adhere properly, the countertop must be completely smooth and level. Use a belt sander with coarse grit sandpaper to flatten any uneven tile surfaces or grout lines. Be careful not to remove too much tile.

Applying the Adhesive

To bond the quartz sheets to the tile, use a specialty countertop adhesive like liquid nails for countertops and tile. Choose an adhesive that works well on both quartz and ceramic tile.

Spread the adhesive evenly across the surface using a notched trowel. Maintain a uniform depth of 1/8 inch. Cover only a small section of the countertop at one time since most adhesives dry quickly.

Setting the Quartz Sheets

Have any seams or edges finished before installation. Carefully set the quartz sheets in place, pressing firmly to adhere to the tile substrate. Use a J-roller across the surface to remove air pockets and ensure a tight bond.

Support thicker edges as needed while the adhesive dries to prevent slipping. If there are any gaps between sheets, fill them with a small amount of adhesive.

Applying Grout and Finishing

Once the adhesive has fully cured, inspect the seams and edges. Use a coloring agent designed for quartz to disguise any remaining gaps or uneven sections.

Apply a grout specifically formulated for quartz countertops between the seams using a rubber grout float. Avoid traditional cement grout which can scratch the surface. Remove excess grout with a damp sponge.

Allow the grout to fully cure according to manufacturer’s directions before use. Your new quartz surface is now ready to use and enjoy! Proper cleaning and care will keep it looking like new for many years.

Frequently Asked Questions About Covering Tile Countertops with Thin Quartz

Can I install a thin quartz sheet over existing laminate countertops?

No, thin quartz sheets require a completely smooth and structurally sound substrate like tile, wood, or an existing full slab quartz surface. Laminate countertops don’t provide an adequate base.

What thickness of quartz material should I use?

Opt for at least 1/4 inch thick material. Quartz thinner than 3/16 of an inch will not have adequate strength and durability. 1/4 inch is ideal for a tile substrate.

Do I need to use a special saw to cut the quartz sheets?

Yes, you will need a wet saw with a diamond blade designed for cutting quartz or granite materials. Standard woodworking saws are not suitable and may damage the material.

Can I install a thin quartz sheet myself or do I need to hire a pro?

For DIYers with some home improvement experience, installing thin quartz over an existing countertop is definitely doable. Those less experienced may prefer hiring a professional installer.

Will seams between quartz sheets be visible?

When installed correctly, seams should be very subtle and nearly invisible. Precisely cutting the edges and proper application of grout and coloring agents minimizes the appearance of seams.

How long does the adhesive need to cure before using the countertop?

Most adhesives take 24-48 hours to fully cure. Avoid placing any heavy objects on the surface and do not use the sink or cooktop during this time.


Installing a 1/4 inch thick quartz overlay is an affordable and stylish way to transform existing tile countertops. With careful surface preparation, proper adhesive selection, precision cutting, and expert installation, thin quartz can conceal old tile and make your kitchen feel brand new. Taking the time to properly address each step in the process leads to a durable, seamless finished product.