How to Install Marble Slab Backsplash

Installing a marble slab backsplash can add natural beauty and elegance to any kitchen. With careful planning and some DIY skills, you can install a marble backsplash yourself. Here is a step-by-step guide on how to install marble slab backsplash.

Choosing the Marble Slabs

The first step is to choose the marble slabs for your backsplash. When selecting marble, consider:

Types of Marble

There are many varieties of marble to choose from. Some popular options include:

  • Carrara – White or gray with subtle veining patterns
  • Statuario – White with bold grey veining
  • Emperador – Rich brown tones with white accents
  • Calacatta – White background with dramatic gray veining

Select marble slabs that match your kitchen’s aesthetic and style.

Marble Thickness

Standard thickness for backsplash marble slabs is 3/8 to 1/2 inch. Thicker marble is heavier and needs strong support.

Marble Finish

Marble comes in polished, honed or tumbled finishes. Polished is glossy, honed is matte, and tumbled is textured.

Marble Sample Size

Get a marble sample to view the true colors, patterns and finishes before purchasing the slabs.

Prepare the Work Area

To install the marble backsplash, you’ll need to:

  • Clear the countertops and protect flooring near the work area.
  • Gather supplies – marble adhesive, grout, saw, etc.
  • Turn off electricity to outlets in the backsplash area.
  • Remove existing backsplash if present.
  • Clean and prepare the wall surface.

Cover nearby surfaces with rosin paper or plastic sheets to prevent damage from water and debris.

Measure and Cut the Marble Slabs

First, measure the backsplash area to determine the slab sizes needed.

Using a circular saw with a diamond blade, carefully cut the marble slabs to the required measurements. A wet saw is best for precise cuts without chipping.

Cut slabs about 1/8 inch smaller than the measured size to allow room for the adhesive and grout lines.

Use eye and ear protection when cutting marble to avoid dust and noise.

Apply the Adhesive

To attach the marble slabs, use a premium white marble adhesive suitable for wet areas.

Spread a layer of adhesive evenly over the back of the marble slab using a notched trowel.

Apply additional adhesive in a thin layer to the wall area where the slab will be installed.

Mount the Marble Slabs

Carefully press the marble slab into place on the adhesive-coated wall.

Tap gently with a rubber mallet to adhere it evenly. Use spacers between slabs to align and get consistent grout lines.

Make sure the marble pieces are level and properly supported, especially heavier thick slabs.

Allow the adhesive to cure fully per manufacturer’s instructions.

Apply the Grout

Mix marble grout – white or colored – as specified by manufacturer.

Spread grout over the seams between marble slabs using a grout float or rubber grout tool.

Push the grout into the crevices to fill completely and evenly.

Wipe away excess grout with a damp sponge and allow drying completely.

Polish lightly with a soft cloth once dry for a clean finished look.

Seal the Marble

Apply a marble sealer to protect the backsplash and grout lines.

Use a spray-on clear sealer made for natural stone. Apply evenly over the entire surface.

Allow sealer to dry then buff off residue for a polished look.

Re-apply sealer once a year to maintain the backsplash and prevent staining.

And that’s it – your new marble backsplash is now installed and ready to enjoy! Proper planning, careful measurement, and taking your time at each step will lead to success.

FAQs About Installing Marble Backsplash

How thick should marble backsplash slabs be?

For backsplashes, 3/8 to 1/2 inch marble slabs are standard and provide an elegant look. Go thicker if you need more stability and support.

What tools do I need to install marble backsplash?

You’ll need a wet saw or circular saw with diamond blade for cutting, notched trowel for adhesive, grout float, sponges, mallet, tape measure, and clamps. Safety gear like goggles is a must.

What type of adhesive works best for mounting marble slab backsplash?

Use a premium white thinset adhesive suitable for natural stone and wet areas like backsplashes. Avoid multi-purpose adhesives.

How soon can I use the kitchen after installing marble backsplash?

Allow the marble adhesive to cure fully – around 24-48 hours typically. Avoid direct water contact and wiping during this time.

Should I use sanded or unsanded grout for marble backsplash?

Unsanded grout is best for polished marble with tight joints like backsplashes. Sanded grout can scratch the marble surface.

How can I get clean grout lines in the marble backsplash?

Carefully push grout into crevices evenly. Wipe excess before drying using minimal water. Re-grout if needed to get clean lines.


Installing a marble backsplash provides a timeless, elegant finish for any kitchen. With some planning, effort, and care, you can add this touch of luxury yourself. Patience and attention to detail are key when cutting, mounting, grouting, and sealing the marble slabs. Follow the proper techniques for success. Be sure to use the recommended marble products and safety gear. Your new marble backsplash will provide natural beauty in your kitchen for years to come.