How to Attach Granite Backsplash to Drywall

Installing a granite backsplash can add style and sophistication to your kitchen. Granite is durable, easy to clean, and available in many colors and patterns. While granite backsplash installation may seem daunting, it can be easily accomplished with proper planning and preparation. Here is a step-by-step guide on how to attach a granite backsplash to drywall.

Supplies Needed

  • Granite backsplash tiles
  • Drywall screws
  • Thinset mortar
  • Notched trowel
  • Grout
  • Grout float
  • Grout sealer
  • Caulk
  • Tape measure
  • Level
  • Utility knife
  • Screwdriver
  • Tile spacers

Preparing the Wall

Proper preparation of the wall is crucial for a successful granite backsplash installation.

Step 1: Remove Old Backsplash

If there is an existing backsplash, take time to remove it completely. Scrape off any leftover debris or adhesive on the wall.

Step 2: Inspect and Repair Drywall

Examine the drywall for any imperfections like cracks, holes or uneven sections. Repair and sand the drywall as needed to create a smooth surface.

Step 3: Apply Drywall Joint Compound

Use drywall joint compound and taping on drywall seams and corners. Allow to dry completely.

Step 4: Prime the Wall

Prime all the exposed drywall with a quality primer/sealer. This provides a uniform surface for the backsplash installation.

Installing the Granite Backsplash

Now that the prep work is complete, it’s time to install the granite backsplash tiles.

Step 1: Plan Your Layout

Dry fit the granite tiles on the wall in the pattern desired. Use spacers to get consistent grout lines. Make adjustments to get the layout centered.

Step 2: Apply Thinset Mortar

Use a notched trowel to spread a thin layer of thinset adhesive on the wall area where the backsplash will be installed. Apply only enough that can be tiled in 30 minutes.

Step 3: Mount Tiles

Starting at the base, press tiles into the thinset firmly. Use a level to ensure they are aligned straight. Place plastic spacers between tiles.

Step 4: Drill and Secure with Screws

Drill holes and secure each tile firmly to the drywall with drywall screws. Be careful not to crack tiles when drilling.

Step 5: Grout the Tiles

Allow thinset to cure fully per manufacturer instructions. Mix grout and apply it over the tiles, pressing into joints with a float. Wipe away excess grout.

Step 6: Seal the Grout

Once grout has dried, apply grout sealer as directed to protect from moisture and stains.

Step 7: Caulk Edges

Run a bead of silicone caulk along top edges, bottom, and sides of the backsplash. Smooth with wet finger for a clean finish.

Tips for Installing Granite Backsplash

  • Carefully review manufacturer instructions for thinset mortar and grout products.
  • Arrange tiles in a dry layout before installing to ensure the best placement.
  • Use tile spacers for consistent spacing and grout lines.
  • Wipe any excess mortar or grout from tiles to prevent drying on granite.
  • Tape off edges of countertops and walls to minimize mess during installation.
  • Work slowly and carefully to get tiles level and avoid cracking.
  • Allow adequate time for thinset and grout to fully cure before use.
  • Seal granite backsplash annually to protect from kitchen stains and moisture.

Installing a granite backsplash provides a high-end look with minimal maintenance. With proper planning and effort, you can have a stunning granite backsplash that enhances your kitchen’s style.

Frequently Asked Questions

What type of thinset should be used for a granite backsplash?

It is best to use a porcelain tile thinset adhesive to install a granite backsplash. Choose a white polymer-fortified mortar that provides a strong bond and some flexibility.

How soon can I use the backsplash after installing?

Allow the thinset mortar to fully cure for 24-48 hours before regular use of the backsplash. Allow grout to cure for 72 hours before heavy cleaning.

What’s the best way to cut granite tiles?

Use a wet tile saw with a diamond blade designed for granite. Mark tiles and cut slowly and steadily for clean cuts. Granite can also be cut with a carbide scoring tool.

Should I use sanded or unsanded grout?

For a granite backsplash with narrow grout lines (less than 1/8 inch), it is best to use unsanded grout. Sanded grout is better for wider grout lines.

How can I get thinset mortar off granite tiles?

Wipe any excess thinset off tiles with a damp sponge before it dries. Use a plastic putty knife to gently scrape off any hardened thinset. Be cautious not to scratch or chip the granite.


Attaching a granite backsplash to drywall adds luxury and visual appeal to any kitchen. With the proper tools and materials, as well as adequate planning and preparation, a DIY granite backsplash installation is totally achievable. Pay close attention to ensuring the drywall is in excellent condition, allowing materials to fully cure, and taking care when cutting and mounting the granite tiles. The result will be a stylish, easy-to-maintain backsplash that will upgrade your kitchen’s design for years to come.