How To Install a Glass Tile Backsplash

Installing a glass tile backsplash can transform your kitchen. This project is an excellent way to update your kitchen’s look without breaking the bank or requiring extensive renovation skills. In the video above, This Old House general contractor Tom Silva demonstrates a fast, no-fuss method for tiling a kitchen backsplash.

Tools and Materials for Installing Glass Tile Backsplash

To install a glass tile backsplash, you’ll need the following tools and materials:

• Chalk line
• Utility knife
• Steel straightedge
• Wet tile saw
• Rubber grout float
• Margin trowel
• Grout sponge
• Bucket
• Cotton cloth
• Glass tile sheets
• Tile adhesive strips
• Premixed tile grout
• Masking tape

Pro Tip: Tiling contractor Joe Ferrante, a veteran of many This Old House projects, advises: “The best thinset adhesives for glass tile have two parts: a white powder and a latex liquid additive.” He recommends products such as Laticrete’s 317 thinset and 333 additive, noting that “mixed together without water, these two components bond tightly to the glass and provide a uniform substrate.” For grout, Ferrante says to use an unsanded product fortified with polymers.

Glass Tile Backsplash Installation Process

Before diving into the project, clear your countertops so you have plenty of space to work. Pull any appliances away from the wall if they’ll be in your way, taking care to disconnect them safely. Cover your countertops with a sheet to protect them from tools and debris. Now, you’re ready to begin.

Preparing the Wall Surface

First, you need to prepare the wall where the tiles will adhere. Here’s how to do it:

1. Clean the wall thoroughly, removing any grease, dirt, or debris.
2. Repair any damaged areas of the wall, ensuring a smooth and even surface.
3. Sand the wall lightly to create a slightly rough texture for better adhesion.
4. Wipe down the wall with a damp cloth to remove any dust from sanding.

Marking the Layout

Marking the layout is the backbone of a neat installation. Use a chalk line or laser level to mark the top and bottom of the space you want the tiles to go in so they’re placed uniformly. 

Applying Adhesive Strips

We recommend using adhesive strips to adhere the tiles instead of mortar because the mortar may show throw some of the glass pieces.

Use a utility knife and steel-rule straightedge to cut five 3/8-inch-wide strips of tile adhesive. Notch the adhesive strips, if necessary, to fit around obstacles. Peel off the protective membrane from the back of the tile-adhesive strips and press them to the wall inside the chalk lines. Ensure there aren’t any bubbles and that it’s completely flat.

Cutting and Preparing Tiles

Cut the tile sheets into 5 1/2-inch-wide strips by slicing through the mesh on the back of the sheets with a utility knife. Repeat to cut enough tile to cover the backsplash wall. Use a wet saw to square-cut the end of the first glass tile strip. Allow the tile strip to dry completely before proceeding.

Pro Tip: As with any tile, if glass mosaic gets cracked or broken, you can tape off and remove the damaged pieces and setting materials to patch in new tile. Keep a carton of extra mosaic sheets on hand to ensure that the replacements match perfectly—this is especially crucial if the repair involves plumbing behind the tile surface and requires removing and then replacing a section.

Installing the Tiles

Peel off the protective membrane from the tile adhesive on the wall. Lay the steel rule on the countertop and up against the backsplash wall to create an even grout-joint space beneath the tile. Lightly set the first tile sheet into place against the tile adhesive. Once satisfied with its positioning, firmly press the tile to the wall. Repeat to install the remaining tile sheets.

Pro Tip: Don’t be tempted to substitute a rubber mallet for the hammer when setting glass tile. Its “bounciness” will cause the tile to shift out of place on the wall. Instead, hold a block of wood over the sheet and lightly tap it with a hammer to apply even pressure across the entire surface.

Grouting and Finishing Your Tile Backsplash

Grouting completes the installation by providing a polished finish. Applying grout seals the tiles and creates a uniform look.

Applying and Cleaning Grout

Use a rubber float to force premixed tile grout into the joints between the tiles on the backsplash wall. Apply at a 45-degree angle, working diagonally. Scrape away excess grout from the countertop with a margin trowel. Allow the grout to firm up for about 10 minutes, then wipe the tiled surface clean with a sponge and clean water.

Wait about five hours for the grout to harden, then use a slightly dampened cotton cloth to buff off any hazy grout residue from the tiled surface.

Pro Tip: After grouting the entire backsplash, clean the surface with a soft sponge and clear water, rinsing the sponge often. Wipe diagonally to the grout lines so as not to pull any grout from the joints. Wait 30 to 45 minutes for the grout to set and for a hazy film to appear on the tiles, then buff off the haze with a clean, dry cloth until the tiles shine. Finally, squeeze a thin bead of tub-and-tile caulk—the same color as the grout—into the joint at the very bottom of the backsplash, in the corners, and between the tiles and the cabinets, and smooth it with a wet finger.

Maintenance and Care for a Glass Tile Backsplash

Some regular maintenance will keep your new backsplash looking its best. Here are some tips for caring for your tile backsplash:

• We suggest sealing the tiles to protect them from staining.
• Clean the surface regularly with a mild cleaner and a soft cloth. Avoid using harsh chemicals or abrasive materials that could scratch or damage the glass tiles.
• Seal the grout lines annually to prevent staining and moisture penetration.
• Address any chips or cracks promptly to prevent further damage.

Pro Tip: According to This Old House Magazine, use a Teflon grout sealant on cementitious grout after installation, as soon as it’s dry, to protect it from water and stains. You’ll still need to stay on top of spills and spatters—like tomato sauce on a backsplash —and wipe them up before they have a chance to seep in. If you have a glass-and-stone blend, ask whether the stone is presealed or if you need to take care of that after installation, then reseal periodically.

Alternative Design Ideas for a Glass Tile Backsplash

If you’re looking for design alternatives, consider these creative twists for your glass tile backsplash:

• Mix and match: Combine glass tiles with other materials, such as stone or metal, for a unique, textured look.
• Color patterns: Play with different shades of glass tiles to create eye-catching patterns or murals.
• Statement pieces: Incorporate decorative tiles sporadically among regular ones for a more personalized design.

Tools