Tiling an inside corner backsplash can seem daunting, but with the right preparation and materials, it can be a straightforward DIY project that transforms the look of your kitchen. Properly tiling an inside corner backsplash not only protects your walls from splashes and stains but also adds style, visual interest, and value to your home. This comprehensive guide will walk you through each step of tiling an inside corner backsplash.
Introduction to Tiling Inside Corner Backsplashes
An inside corner backsplash refers to the section of backsplash that sits in the corner where two countertops meet at a 90-degree angle. Tiling this area can be tricky because you need to cut the tiles to fit the corner precisely. Proper planning and careful tile layout are crucial for getting clean, smooth grout lines that enhance the backsplash design.
The key steps covered in this guide include:
- Selecting the right backsplash tile and grout
- Preparing the surface and corner
- Measuring and cutting the corner tiles
- Applying thinset and laying the tiles
- Grouting between the tiles
- Sealing and protecting the finished backsplash
Properly installing an inside corner backsplash takes precision, patience, and the right materials. The end result is well worth the effort, providing an elegant focal point and seamless finish. Follow the techniques outlined below, work carefully, and you can achieve a professional-looking tiled corner backsplash for your kitchen.
How to Choose Tile for Inside Corner Backsplashes
Choosing the right tile is the first critical step for a successful corner backsplash project. Consider the following when selecting tile:
Tile Material
Popular options include ceramic, porcelain, glass, and natural stone. Porcelain and ceramic tiles are very durable, water-resistant, and cost-effective. Natural materials like marble, granite, and travertine have unique veining for one-of-a-kind styles. Mosaics made of glass or ceramic add glittering accents.
Tile Size
Smaller tiles like mosaics, 3×6, or 4×4 sizes are better for inside corner installations. Larger tiles may not bend well around the corner. Tiles under 4 inches are easiest to cut and shape.
Tile Style
Choose tiles that fit your overall kitchen decor. Brighter solid colors make for bold, dramatic backsplashes. Subway tiles and mosaics create timeless, classic designs. Natural stone adds texture.
Tile Finish
Glossy, reflective finishes illuminate the space. Matte or honed finishes offer subtle elegance. Textured tiles like subway brick have rustic charm.
Always get extra tiles beyond your measurements to account for broken or damaged pieces. You may need about 10% more for cuts too.
How to Prepare the Surface Before Tiling a Corner Backsplash
Proper preparation is essential for the tiles to adhere correctly on the wall surface. Follow these steps to get your corner backsplash area installation-ready:
Clean the Surface
Use a general household cleaner to scrub the walls and remove any grease, debris, or soap buildup. Rinse thoroughly. Let dry completely so the thinset mortar can bond.
Remove Old Backsplash
If there is an existing backsplash, carefully pry off the old tiles with a putty knife. Scrape off all leftover thinset, adhesive, and grout until you expose the bare surface.
Fill Any Gaps or Holes
Examine the walls for cracks, chips, uneven spots, or gaps around the edges. Fill any small holes with spackle and let dry completely. Use silicone caulk for larger gaps around sinks, faucets, cabinets, etc.
Sand Rough Areas
Lightly sand any bumps or uneven areas to help the thinset mortar adhere better. Wipe away dust with a damp cloth.
Prime the Surface
Apply a primer coat like Kilz to freshly filled drywall or bare drywall corners. This helps prevent cracks and provides a uniform surface for the thinset to bind to.
With the surface prepped, you can move onto laying out the tile design.
How to Cut Tile for Inside Corner Backsplash
The key to a clean look is precisely cutting the tiles to fit in the 90-degree inside corner. Follow these steps:
Measure from Corner to Wall Edge
Measure from the inside corner to the outer edge of the backsplash area. For example, if it spans 15 inches from corner to edge, you will cut tiles to that length.
Mark Tile for Cutting
Take a full tile and mark the measured length from the edge that will sit in the corner. This is where you will cut the tile.
Cut the Tile
Use a wet saw with a diamond blade to cut tile cleanly along the marked line. Water lubricates and cools while cutting.
Test Fit the Cut Tile
Temporarily place the cut tile in the corner to ensure you’ve achieved a perfect 90-degree angle fit.
Repeat to Cut All Corner Tiles
Measure and cut tiles for the entire height of the backsplash corner area. Always keep cut edges oriented towards the wall corner.
Having properly cut corner tiles ensures your design lines up accurately. Don’t fret about nicks or uneven edges as the grout will hide small imperfections.
How to Apply Thinset Mortar for Backsplash Tiles
Thinset mortar provides the adhesive base layer that bonds the tiles to the wall. Follow proper application techniques:
Choose the Right Thinset
For ceramic or porcelain, use white polymer-modified thinset. For natural stone, use unmodified thinset. Acrylic additives make thinset more flexible and resistant to cracks.
Load Tile Trowel Properly
Hold the trowel at a 45-degree angle and use a scooping motion to load it evenly with thinset. Get enough to properly spread across each tile’s backside.
Spread Thinset Evenly
Apply a thin, even layer of thinset on the wall area, using the trowel’s notched edge. Hold at a consistent low angle for uniform depth.
Back-Butter the Tiles
In addition to thinset on the wall, spread a layer across the entire backside of each tile too. This “back-buttering” ensures maximum adhesion.
Follow Open Times
Adhere tiles to the wall before the thinset dries or “skins over” beyond its open time. Check thinset package for open times.
With thinset properly prepped and applied, the tiles are ready to affix to the wall.
How to Install Tiles in an Inside Corner Backsplash
Carefully sticking the pre-cut tiles to the prepared backsplash corner area results in a seamless design. Follow best practices:
Test Fit Cut Corner Tiles
Do a dry run first. Place the corner tiles temporarily without any adhesive to ensure proper fit and alignment.
Apply Tiles Starting at Bottom
Working from bottom up helps keep tiles aligned. Start in the corner and place cut edge flush along vertical corner.
Press Tiles Firmly
Use gentle pressure to flatten all tiles firmly into the thinset. Push out any air pockets or excess thinset. Use tile spacers for consistent grout lines.
Check Alignment
Step back periodically and sight lines to ensure tiles align horizontally and vertically. Adjust gently before thinset sets.
Leave Grouting Gap
Don’t butt tiles too tightly. Leave a 1/16th inch gap between tiles for grout. Corner gaps can be slightly wider if needed.
Work methodically and carefully to get tiles adhered straight and true to the corner. Let thinset cure fully per package directions before grouting.
How to Grout Inside Corner Backsplash Tiles
Grout fills the joints between tiles, creating a finished look. For best results grouting your new corner backsplash:
Choose the Right Grout
Use unsanded grout for tile joints under 1/8 inch. For wider gaps, use sanded grout. Match grout color to your tile and overall design. Bright white grout maximizes contrast.
Prep the Area
Remove all spacers. Wipe away any thinset or debris between tiles with a damp sponge. Tile surface should be clean and dry for grouting.
Apply Grout Rubber Float
Holding grout float at 45-degree angle, firmly press grout into corners and joints until completely filled. Take care not to pull out grout.
Clean Excess Grout
Wipe a damp sponge diagonally across tiles to remove excess grout. Rinse sponge frequently. CAUTION: Do not wait too long or grout can become difficult to remove.
Finish and Seal Grout
After grout dries, use a soft cloth to polish the surface lightly and remove any remaining haze. Apply grout sealer to protect from stains.
Let the grout cure fully before using the backsplash. Properly sealing the grout will keep your new corner tiles looking sharp.
Tips for Achieving a Flawless Inside Corner Backsplash
Here are some additional pointers to help you get professional-looking results:
- go slowly and double-check tile cuts for accuracy
- use tile spacers consistently for straight grout line spacing
- ensure thinset and tiles stay aligned when applying to corner
- match cut edges precisely to get tight corner joints
- keep work area clean and free of thinset globs or dried grout
- work in small sections for easier handling at the corner
- use tape or sheet plastic to protect surrounding countertops or walls
- wipe away all excess grout immediately before it dries
- allow tile and grout to cure fully before exposing to moisture
- seal grout and reseal periodically to prevent staining
Take your time and avoid rushing the job. Remaining patient with each step results in a stunning backsplash you will enjoy for years.
FAQ About Tiling Inside Corner Backsplashes
Here are answers to some frequently asked questions about installing an inside corner backsplash:
Should I hire a pro or DIY?
An experienced tile setter can tackle tricky corner backsplashes quickly. But patient DIYers can do quality work with the right prep and materials.
What thinset is best for corner backsplash tile?
White polymer-modified thinset provides maximum adhesion and flexibility. Make sure it’s suitable for your tile type.
How do I keep tiles aligned in the corner?
Work from bottom up, test fitting corner tiles first. Use spacers to maintain even grout line spacing. Step back to check alignment.
What if my corner isn’t perfectly 90 degrees?
You can fudge the angle slightly on cut tiles and vary grout lines a bit to compensate. Taking time to get precision cuts helps minimize corner gaps.
How soon can I get the backsplash wet?
Cured thinset takes about 24 hours before grouting. Let grout cure another 24 hours minimum before exposing to moisture. Check product drying times.
Do I need special tools for cutting?
A wet saw with a diamond blade designed for tile makes precise corner cuts. You can also use a tile nipper and carbide grout saw, but cuts may be less precise.
How do I finish the raw tile edges?
Bullnose edge tiles hide cut edges along the countertop. You can also use trim pieces or add an edging strip.
Properly installing tile on an inside corner backsplash provides a clean, seamless finish that elevates your entire kitchen’s style. With the right materials, tools, and techniques outlined above, you can achieve striking results. Just take your time, double-check each step, and don’t be afraid to ask for help from an experienced tile pro if needed. With careful planning and execution, you can enjoy your new, beautifully tiled corner backsplash for years to come.
Conclusion
Transforming an ordinary kitchen corner into a stunning focal point is easily achievable by tiling the inside corner backsplash properly. With the right tile choice, surface preparation, precise tile cuts, quality thinset application, proper grouting, and finishing, even DIYers can obtain professional-level results. Carefully following the steps provided above will help you avoid frustrations and maximize the impact of your new corner backsplash tile design. Just remember to work slowly, double-check measurements, use spacers, and keep the area clean. With patience and proper technique, you can install an inside corner backsplash like a pro to highlight your cooking space with style.