How to Install Quartz Countertop on Island

Installing a quartz countertop on your kitchen island can really upgrade the look and feel of your space. Quartz is an engineered stone that is very strong, durable, and low maintenance. With a few tools and some careful planning, you can install a quartz island countertop yourself. Here is a step-by-step guide to installing quartz countertops on your kitchen island.

Choose the Right Quartz Slab

When selecting your quartz slab, consider the color, pattern, and finished edges. Think about how the new countertop will complement your existing kitchen decor. Most quartz has consistent color and patterning throughout, but some types have more variation. Choose a reputable brand like Caesarstone, Cambria, or Silestone. Order your slab based on accurate measurements and allow extra for overhangs and seams.

Prepare the Island for Installation

Installing the countertop is the last step, so be sure your island cabinetry is ready. Remove any existing countertop. Then:

  • Ensure the cabinet base is level and secure.
  • Fill any imperfections with wood putty.
  • Sand and clean the surface thoroughly.

Test fit the quartz slab on the island to check measurements. Have your installer mark the overhangs and any cutouts needed for a sink or other features.

Cut the Quartz Pieces

Have your quartz slab fabricator cut the pieces according to the marked measurements. This includes:

  • Main countertop section(s)
  • Backsplash
  • Any cutouts for sinks, cooktops, etc.

The fabricator will cut the quartz using a special saw. This expertise ensures precise cuts and edges. Perform this step before beginning installation.

Apply Adhesive to the Island

Quartz countertops are installed using adhesive and seam tape/caulk. Use a premium construction adhesive made for solid surfaces. Apply a generous zig-zag bead across the top of your island using a caulking gun. Stay 2 inches away from the edges.

Set the Quartz in Place

Carefully place your main quartz slab pieces on the island. Have helpers to manage the heavy material. Ensure the overhangs align correctly. Apply firm pressure across the surface to adhere the quartz. Tape any seams with the provided seam tape. Weight down the countertop while the adhesive sets per the manufacturer’s directions.

Install Backsplash and Attach Quartz

Apply a small bead of adhesive along the wall where the backsplash meets the countertop. Carefully set the backsplash in place. Once the main slabs are fully adhered, run a bead of clear silicone caulk along all the edges and seams. Smooth with a wet finger for a clean finish. Allow the caulk to fully cure.

Finish the Edges

The finishing touch is dressing up the finished edges! Your fabricator will have shaped the overhangs and ends of your quartz pieces. For a clean, polished look:

  • Sand any rough spots with fine (220+) grit sandpaper.
  • Thoroughly clean and wipe down all edges.
  • Apply a clear marine epoxy resin designed for quartz edges.
  • Allow to fully cure per product instructions.

That completes the installation process! Proper care and cleaning will keep your quartz island countertop looking like new for many years. Enjoy the upgraded look and durability.

Frequently Asked Questions About Installing a Quartz Island Countertop

Can I install a quartz island countertop myself?

Yes, with some DIY experience, the right tools, and help lifting the heavy slabs, you can install a quartz countertop on your kitchen island yourself. Precise measurements, proper adhesive, and careful seam placement are key.

What adhesive do you recommend for a DIY quartz install?

We recommend a premium construction adhesive made specifically for solid surface materials like quartz. Examples include solid surface epoxies or polyester resin adhesives. Follow all product instructions carefully.

How thick should my quartz island countertop be?

The standard thickness for a quartz countertop is 3 cm or 1.25 inches. That provides an ideal balance of durability and weight. Go thicker if you prefer a beefier look or need it to span a broader island base.

Can you cut quartz countertops yourself?

It is not recommended. Quartz is very difficult to cut and requires special tools. Leave this step to the professionals to get perfectly straight cuts and edges without cracking or chipping the slab.

Should I hire a pro to install my quartz island top?

While possible as a DIY project, many homeowners prefer to hire a professional installer for quartz countertops. They have the expertise to properly cut, seam, and mount the quartz perfectly on the first try.

Does quartz need to be sealed after installation?

No, quartz does not require sealing or waxing. Proper cleaning is all that is needed after installation. Avoid abrasive cleaners or scouring pads, as those can dull the finish. Quartz is much lower maintenance than natural stone.


Installing a quartz countertop on your kitchen island provides a gorgeous, functional upgrade to your space. With some careful preparation, adhesive, and elbow grease, it can be a manageable DIY project. Or, hire a professional for a flawless install. Either way, a quartz island countertop will provide beauty, durability, and style for years to come. Be sure to care for it properly by using the right cleaners and avoiding damage from cuts. Enjoy your stunning new gathering spot! Let us know if you have any other questions.