How to Put Up a Backsplash with Glass Tiles

Installing a glass tile backsplash can add a touch of elegance and visual interest to any kitchen or bathroom. With proper planning and preparation, even novice DIYers can achieve beautiful results. Here is a step-by-step guide on how to put up a backsplash with glass tiles.

Choosing the Right Glass Tiles

When selecting glass tiles, consider the size, texture, and color that will work best for your design. Smaller tiles like mosaics can create a busy pattern, while larger tiles project a more seamless look. Frosted or textured glass diffuses light beautifully in a space, while glossy tiles reflect light and colors. Cool hues like blue and green glass tiles lend a relaxing vibe, while jewel tones amp up the glam factor.

Make sure to buy a few extra tiles than you need to account for breakage and cutting. Glass tile is prone to chipping, so handle it gently. Purchase tiles from the same production lot to ensure consistent sizing and color.

Preparing the Surface

Proper surface prep is crucial for a long-lasting installation. The substrate surface should be clean, dry, and free from grease and soap scum. Painted surfaces must be deglossed so the thinset can adhere correctly. Any loose paint or wallpaper should be removed.

Use a level to ensure the wall is flat. Mix up a batch of thinset mortar and apply it to the wall using a notched trowel to scratch the surface. Allow it to cure completely before moving on. This creates a strong base for the tiles to bond to.

Laying Out Your Design

Map out the tile layout on the wall using a pencil and ruler. Mark the center and draw vertical and horizontal lines as guides. Dry fit a row of tiles to see how they look. Adjust the starting point to balance the tiles and minimize sliver cuts at the edges.

For a symmetrical design, work outward from the center. For asymmetrical patterns, start from the bottom. Use tile spacers between each tile to ensure even grout lines.

Installing the Tiles

Apply a layer of thinset to the backing of the tiles using the notched side of the trowel. Firmly press the tiles into the thinset on the wall. Twist them back and forth to collapse the trowel ridges and ensure maximum contact and adhesion.

Ensure the tile faces are clean as you work to remove any thinset, and use tile spacers to maintain even grout lines. Allow the thinset to cure fully before grouting. Remove any spacer nubs or excess thinset with a utility knife.

Grouting Between Tiles

Mix up high-quality, polymer-modified sanded grout for glass tiles. Apply to the grout lines using a rubber grout float, pressing firmly to fill the joints. Hold the float at a 90° angle and scrape diagonally across tiles to remove excess.

Once grouted, spray the tiles lightly with water and smooth any low spots with a sponge. Clean excess grout with a damp sponge once it becomes firm. Polish with a soft cloth once dry. Allow the grout to cure fully before using the surface.

Finishing Touches

Inspect for any remaining thinset or grout haze and remove with a grout haze remover. Seal the grout lines with a penetrating sealer to prevent staining. If needed, use cut tiles and thinset to fill in around outlets, corners, and edges for a seamless finish.

Finally, caulk between the countertop and backsplash using a flexible silicone sealant. Wipe away any excess for a neat joint line. Allow everything to fully cure before using your new backsplash. Proper prep and careful installation will allow you to enjoy the brilliance of glass tiles for years to come.

Frequently Asked Questions About Installing a Glass Tile Backsplash

What tools do I need to install a glass tile backsplash?

You’ll need basic tiling tools like a notched trowel, spacers, grout float, sponges, mixing bucket, tile cutter, safety glasses, and grout sealer. A wet saw with a diamond blade is ideal for cutting glass tiles accurately. Have isopropyl alcohol on hand to clean glass dust.

How do I cut glass mosaic tiles?

Use a wet saw with a diamond blade designed for glass. For intricate cuts, score the tile with a glass cutter then snap it over a dowel. Use nippers on edges. Handle cut tiles carefully as the edges can be sharp. Never dry cut glass tiles – the dust can damage lungs.

What thinset is best for glass tile?

Use a white, polymer-modified thinset mortar suitable for glass and tile. It offers a strong bond and resists cracking and shrinkage. Mix it to a toothpaste-like consistency without adding too much water.

How long does thinset take to cure before grouting?

Thinset cure times vary by brand, but generally 24-48 hours is needed before grouting glass tiles. Test a tile by firmly twisting – if it resists moving, the thinset has cured properly. Grout too soon and tiles may shift and crack.

Can I use sanded grout with glass tile?

Yes, sanded grout is the best choice as it resists shrinking and cracking. Make sure to use unsanded grout only for grout lines smaller than 1/8 inch. The sand in sanded grout helps fill joints and prevent cracks with glass tile.

What’s the easiest way to clean grout haze off glass tile?

Use a mild acidic grout haze remover – it’s the safest and most effective method. Spray it on, let it sit for a minute or two, gently scrub with a soft brush, then rinse off. Avoid abrasive cleaners which could scratch the surface.


Installing a glass tile backsplash adds striking visual appeal to any space, and truly elevates a kitchen or bath design. With careful planning and preparation, this is a DIY project suitable for an intermediate to advanced homeowner. Focus on proper substrate prep, precise tile cutting, conscientious installation, and meticulous grouting and cleaning. The end result will be a stunning backsplash that shines beautifully for years to come. With proper care, a glass tile backsplash will impart timeless beauty and upgrade any room.