How to Cover Tile Countertops with Thin Quartz

Covering existing tile countertops with a fresh layer of thin quartz can transform your kitchen or bathroom without requiring a full countertop replacement. With the right materials and techniques, you can achieve a stylish, modern look in just a weekend. Here is a step-by-step guide to covering tile countertops with thin quartz.

Assessing Your Existing Countertops

Before beginning this project, carefully inspect your existing tile countertops to determine if they are suitable candidates for resurfacing. Ideal countertops for overlaying with thin quartz should have the following characteristics:

  • A sound, sturdy substrate without cracks or damage
  • Minimal grout lines between tiles
  • Tiles that are securely attached and level with one another
  • No uneven tile edges or lippage between tiles
  • A clean surface free of grease, wax, or other residues

If your countertops are damaged, uneven, or show signs of moisture damage, it is best to replace them fully rather than attempting to overlay them.

Choosing Your Thin Quartz Material

There are a few different branded options when it comes to thin quartz countertop overlays. Two of the most popular choices include:

  • Silestone Quartz Overlays: Come in slab thicknesses of 1/16″ to 1/8″ and allow installation over most existing countertops. Offered in a wide range of colors and finishes.
  • Cambria Quartz Overlays: Available in 1/16″ to 1/2″ thicknesses. Can be installed seamlessly over existing countertops. Durable and low-maintenance.

No matter which brand you choose, always consult the manufacturer’s recommendations and specifications before purchasing your thin quartz material. Some quartz may not be suitable for installation over all surfaces.

Preparing the Surface

Proper preparation is crucial for a successful thin quartz overlay installation. Here are the key steps:


Use a degreasing cleaner to remove any waxes, oils, or soap residues from the existing tile. Rinse thoroughly and allow to fully dry.


Lightly scuff up the glazed tile surface using a diamond-grit scarifying pad. This helps the overlay bond properly. Take care not to remove too much tile glaze.

Filling Grout Lines

Use a thin-set mortar or epoxy filler to fill in any wide grout lines and smooth over the transition between tiles. Allow filler to cure completely per manufacturer instructions before overlaying.

Leveling Uneven Surfaces

For countertops with slight variances in height between tiles, use a self-leveling underlayment to create a smooth, even surface prior to overlay.

Proper prep work allows the thin quartz to bond tightly and prevents future cracking or delamination issues.

Installation of the Thin Quartz Overlay

Follow all the manufacturer’s instructions for the quartz overlay product you have selected. Here is a general overview of the process:

  • Cut overlay pieces to fit your countertop layout. Allow for 1/8″ gaps between pieces to account for expansion.
  • Mix thin-set mortar adhesive per directions and apply evenly to the back of the quartz pieces.
  • Carefully position and press quartz pieces into place, working any air pockets out towards edges.
  • Use painter’s tape strips to hold pieces tightly together while adhesive cures.
  • Once adhesive has set, use a razor blade to trim any overhanging quartz edges flush with the countertop perimeter.
  • Finally, use color-matched caulk to fill in the seams between overlay pieces for a seamless look. Wipe away excess caulk with a wet cloth before it dries.

Follow all adhesive cure times specified before using your new quartz countertops! Proper installation ensures your overlay provides years of beauty and durability.

Achieving a Flawless Finish

To complete your thin quartz overlay countertop transformation, follow these finishing steps:

  • If needed, carefully sand any minor uneven spots or quartz edges with 220 grit sandpaper. Avoid over-sanding.
  • Clean the entire surface with a quartz-safe cleaner and wet microfiber cloth to remove residue.
  • Consider sealing the quartz to increase stain resistance, especially for kitchen use. Use a product designed for quartz.
  • Finish edges and integrate backsplashes for a built-in look. Match caulk color to quartz.
  • Add any desired backlighting, outlets, sinks, faucets and accessories to truly customize your new workspace.

Take pride in your DIY thin quartz countertop project that saved time and money compared to a full replacement. Enjoy the renewed look and feel that this upgrade provides.

FAQs About Overlaying Tile Countertops with Thin Quartz

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

With some DIY experience, you can install a simple thin quartz overlay on existing countertops yourself, provided the overlay pieces are not too large or heavy. Complex jobs may benefit from hiring a professional installer.

What thickness of quartz material should I use for the overlay?

1/16″ to 1/8″ overlays are common for a smooth finish over most tile countertops. Go thicker if you need to compensate for uneven tile edges or grout lines.

Should I demolish my old tile countertops instead of overlaying them?

In most cases, an overlay is much quicker and cheaper than a full countertop replacement. As long as your tiles are in good condition, an overlay is a great option.

Can I use thin quartz on a laminate, solid surface, or granite countertop?

Always check with the manufacturer, but many thin quartz products can be installed over other materials beyond just tile, expanding your options.

How long will a quartz overlay last compared to new countertops?

Installed correctly, a thin quartz overlay should last 15-20 years or more before needing replacement, similar to a new full quartz countertop.


Installing a DIY thin quartz overlay offers a fast, affordable way to update existing tile countertops with dramatic results. With proper materials and preparation, you can achieve a smooth, seamless look that appears brand new. Take the time to carefully assess your existing countertops, choose the right quartz product, and follow all installation steps closely. The end result will bring your kitchen or bath into the modern age with eye-catching style.