How Do You Properly Tile Corners in a Shower?

AvatarByColleen Barnes Shower Routine & Lifestyle

Tiling a shower can transform an ordinary bathroom into a sleek, spa-like retreat, but when it comes to corners, many DIY enthusiasts and professionals alike encounter a unique set of challenges. Corners in a shower aren’t just aesthetic focal points—they must be carefully tiled to ensure durability, water resistance, and a polished finish. Mastering the art of tiling corners can elevate your project from good to exceptional, making your shower both beautiful and functional.

Understanding how to tile corners in a shower involves more than just placing tiles side by side. It requires attention to angles, grout lines, and waterproofing techniques that prevent leaks and mold growth. Whether you’re working with simple square tiles or intricate patterns, the way you approach corners can significantly impact the overall look and longevity of your shower walls.

In the following sections, we’ll explore the essential principles and tips for tackling shower corners with confidence. From selecting the right tools and materials to achieving clean, precise edges, you’ll gain the knowledge needed to handle this often tricky aspect of tiling with ease and professionalism.

Preparing the Corners for Tiling

Before starting to tile the corners in your shower, it is essential to ensure the surfaces are properly prepared. The corner area must be clean, dry, and free from any dust, soap scum, or loose material. If necessary, sand down any uneven spots and fill gaps or holes with a waterproof patching compound to create a smooth, stable substrate.

For inside corners where two walls meet, check the angle with a carpenter’s square. Ideally, corners should be a true 90 degrees, but slight irregularities are common in older constructions. Use a flexible waterproof membrane or corner tape to reinforce the joint and prevent water penetration, which is critical in wet environments like showers.

Applying a waterproofing layer before tiling is a must. This can be a liquid waterproof membrane painted onto the walls or a sheet membrane installed in the corner. Allow the waterproofing to cure fully according to the manufacturer’s instructions to ensure maximum protection.

Choosing the Right Tile and Tools for Shower Corners

Selecting appropriate tile and tools will make the corner tiling process smoother and more durable. Smaller tiles or mosaic tiles often work better in corners due to their flexibility in fitting into tight spaces without excessive cutting.

Essential tools for tiling corners include:

  • Tile cutter or wet saw for precise cuts
  • Notched trowel sized for your tile dimensions
  • Tile spacers to maintain even grout lines
  • Level and measuring tape for accuracy
  • Rubber float for grouting
  • Sponge for cleaning excess grout

Also, consider using edging strips or corner trims made from metal, plastic, or tile to protect the edges and create clean, professional lines.

Techniques for Tiling Inside Corners

Inside corners require careful alignment to ensure the tiles meet neatly and the grout lines are consistent. Start by applying thin-set mortar on one wall using the notched trowel, then press the first tile firmly into place. Work from the corner outward, placing tiles so that their edges meet precisely in the corner.

To tile the adjoining wall, apply mortar and set the tiles similarly, ensuring the corner tiles butt tightly against each other without overlapping or gaps. Use tile spacers to maintain a uniform grout line, typically 1/8 inch or as desired.

When cutting tiles for inside corners:

  • Measure the width of the corner carefully.
  • Cut the edge of the tile that will sit against the wall to ensure a tight fit.
  • For irregular corners, slightly bevel the tile edges for better adhesion and appearance.

Techniques for Tiling Outside Corners

Outside corners, where the wall protrudes, require a different approach to protect the tile edges and create a clean finish. Begin by installing a corner trim or edging strip to shield the tile edges from chipping and impact.

Apply thin-set mortar to the wall and the back of the tile, then press the tile firmly into place along the edge. The tiles on each side of the outside corner should meet over the trim, ensuring a tight fit and consistent grout line.

When cutting tiles for outside corners:

  • Cut tiles with a slight mitered edge (usually 45 degrees) for a seamless corner joint.
  • If miter cuts are not feasible, use bullnose tiles designed for corners.
  • Use a tile file or rubbing stone to smooth any rough edges after cutting.

Grouting and Sealing Corner Tiles

Once all tiles are set and the thin-set mortar has cured, apply grout to the joints between tiles. Use a rubber float to press grout firmly into the gaps, especially in corners where water exposure is highest. Wipe away excess grout with a damp sponge before it dries to avoid residue buildup.

For corners, applying a flexible silicone caulk instead of grout in the immediate joint can accommodate slight movement and prevent cracking. This is particularly important in shower corners where walls expand and contract with moisture and temperature changes.

After grouting and caulking, allow sufficient drying time before applying a high-quality grout sealer. The sealer prevents water penetration, staining, and mildew growth, prolonging the life and appearance of your tiled shower corners.

Common Challenges and Solutions When Tiling Shower Corners

Challenge Cause Solution
Uneven tile edges in corners Irregular wall angles or inaccurate cuts Use flexible waterproof membrane; bevel cuts
Cracked grout in corners Movement or improper caulking Use silicone caulk instead of grout
Water seepage behind tiles Poor waterproofing or gaps in corner joints Apply waterproof membrane and corner tape
Difficulty cutting small tiles Inadequate tools or skill Use a wet saw and practice precise measurements
Tile chipping on outside edges Lack of corner trim or improper cutting Install corner trim and use bullnose tiles

Addressing these issues with the right preparation and techniques ensures a durable, aesthetically pleasing tiled shower corner that withstands moisture and daily use.

Preparing and Measuring Corners for Tiling

Proper preparation and accurate measurement are crucial for achieving clean, professional results when tiling corners in a shower. The tight angles and potential for water exposure require precision and careful planning.

  • Clean and Dry Surfaces: Ensure the corner walls are free of dust, dirt, grease, and moisture. Any residual debris can compromise tile adhesion.
  • Check for Evenness: Use a level to verify that the walls forming the corner are plumb and flat. Uneven surfaces may require patching or the use of shims for an even tile application.
  • Measure Corner Angles: Use a protractor or angle finder to confirm that the corner is a true 90 degrees. If the corner is irregular, plan tile cuts accordingly to maintain consistent grout lines.
  • Calculate Tile Layout: Determine how tiles will align at the corner by measuring from the corner outwards along both walls. This helps avoid awkward small tile cuts at the edges and allows you to center tiles or cuts symmetrically.

Selecting the Right Tile and Tools for Shower Corners

Choosing appropriate materials and tools facilitates a durable and aesthetically pleasing tile installation, especially in shower corners where water exposure and tight spaces challenge standard techniques.

  • Tile Type: Porcelain and ceramic tiles are common, but ensure they have a slip-resistant finish for safety. Smaller mosaic tiles or specially designed corner tiles can simplify installation in tight corners.
  • Tile Size: Smaller tiles are often easier to manipulate around corners and curves, but larger tiles can offer a modern look if cuts are precise.
  • Waterproofing Materials: Use waterproof backer boards (such as cement board) and a quality waterproofing membrane to protect the corner from moisture penetration.
  • Tools Required:
    • Tape measure and level
    • Tile cutter or wet saw for precise cuts
    • Notched trowel sized appropriately for your tile
    • Rubber grout float
    • Tile spacers
    • Caulk gun with silicone caulk for corners
    • Angle grinder or tile nippers for complex cuts

Techniques for Tiling Inside Corners

Inside corners in showers require meticulous attention to detail to ensure waterproofing, clean grout lines, and a seamless transition between walls.

Step Action Expert Tips
1 Apply waterproof membrane on both walls extending into the corner Overlap membranes to prevent water infiltration; allow proper drying time
2 Start tiling from the corner outward on both walls simultaneously Use tile spacers to maintain consistent grout lines; ensure tiles are plumb
3 Cut tile edges to create a tight, clean butt joint in the corner Use a wet saw or tile nippers to achieve precise 90-degree edges
4 Apply thinset mortar with a notched trowel and press tiles firmly Back butter tiles if needed for better adhesion in corners
5 Allow thinset to cure before grouting Follow manufacturer’s recommended curing times for optimal bond
6 Grout the joints, paying special attention to the corner joint Use a grout float at a 45-degree angle to pack grout fully into joints
7 Seal the inside corner with a high-quality silicone caulk after grout cures Caulk provides flexibility and prevents grout cracking in corners

Approach for Tiling Outside Corners in Shower

Outside corners are prone to chipping and damage, so they require a slightly different approach to ensure durability and a clean finish.

  • Use Corner Trim or Bullnose Tiles: Installing metal or plastic corner trim profiles, or bullnose tiles, protects the edges and gives a professional appearance.
  • Cut Tiles Accurately: Cut tiles to fit snugly against the trim or adjoining wall with minimal gaps.
  • Apply Thinset and Position Tiles: Spread thinset evenly and press tiles into place, ensuring edges align perfectly with the trim.
  • Grout and Seal: Once thinset dries, grout as usual and seal edges where tile meets trim to prevent water ingress.
  • Reinforce with Caulk: Apply a bead of silicone caulk along the outside corner edges where tiles meet trim for added waterproofing and flexibility.

Common Challenges and Solutions When Tiling Shower CornersProfessional Techniques for Tiling Shower Corners

Linda Martinez (Certified Tile Installer, National Tile Association). When tiling corners in a shower, precision is paramount. I recommend using a high-quality waterproof membrane before applying thin-set mortar to ensure durability. Cutting tiles at a 45-degree angle for inside corners allows for a clean, seamless joint that prevents water infiltration and enhances the overall aesthetic.

James O’Connor (Bathroom Renovation Specialist, HomePro Experts). Proper alignment is crucial when tiling shower corners. I advise starting from the bottom corner and working upward, using tile spacers to maintain consistent grout lines. Additionally, applying silicone caulk in the corner joints after grouting provides flexibility and prevents cracking caused by movement or temperature changes.

Sophia Chen (Architectural Designer, AquaBuild Studios). From a design perspective, the choice of tile size and pattern significantly impacts corner tiling. Smaller tiles or mosaics can conform better to corner angles and reduce the need for extensive cutting. It’s also essential to ensure that the substrate is perfectly flat and plumb to avoid uneven edges and gaps in the corners.

Frequently Asked Questions (FAQs)

What is the best tile type for shower corners?
Porcelain and ceramic tiles are ideal for shower corners due to their durability, water resistance, and ease of cleaning. Choose tiles with a matte finish to reduce slipperiness.

How do I ensure waterproofing when tiling shower corners?
Apply a waterproof membrane or backer board specifically designed for wet areas before tiling. Seal all joints and corners with waterproof caulk or silicone to prevent water infiltration.

What tools are essential for tiling corners in a shower?
Key tools include a tile cutter or wet saw, notched trowel, tile spacers, level, rubber grout float, and a caulking gun for sealing corners.

How should I cut tiles to fit perfectly in shower corners?
Measure the corner dimensions precisely and use a wet saw or tile nippers to make accurate cuts. For inside corners, consider using bullnose or trim tiles to achieve a clean finish.

What grout type is recommended for shower corners?
Use a waterproof, mold-resistant grout such as epoxy grout for shower corners. It offers superior durability and prevents mold growth in moist environments.

How do I maintain tiled shower corners to prevent mold and mildew?
Regularly clean grout lines with a mild cleaner and ensure proper ventilation in the bathroom. Reseal grout annually to maintain its water resistance and prevent mold buildup.
Successfully tiling corners in a shower requires careful preparation, precise measurements, and attention to detail to ensure a clean, professional finish. Proper surface preparation, including waterproofing and ensuring the walls are smooth and level, is essential to prevent future water damage and tile misalignment. Using the right tools, such as tile spacers and a wet saw, helps achieve accurate cuts and consistent grout lines, especially around corners where tiles meet at angles.

When tiling inside corners, it is important to apply tile adhesive evenly and press tiles firmly to avoid gaps. Cutting tiles to fit snugly around corners and using corner trim or bullnose tiles can enhance both the durability and aesthetic appeal of the shower. Additionally, sealing grout lines and corners with a high-quality waterproof sealant is crucial to maintain the integrity of the tiled surface and prevent mold growth.

Overall, attention to detail, patience, and using appropriate materials and techniques are key to achieving a durable and visually pleasing tiled corner in a shower. By following best practices, homeowners and professionals alike can ensure the longevity and beauty of their shower tiling projects.

Author Profile

Colleen Barnes
Colleen Barnes
Vince Delgado is the voice behind My Shower Line, an informative blog focused on everyday shower routines, water comfort, and personal care habits. Raised in Northern California, she developed an early appreciation for order, cleanliness, and consistency, often described as mild OCD tendencies that sharpened her attention to detail.

With a background in Consumer Product Design and years of experience analyzing home and shower products, Vince brings calm, practical clarity to topics many people find confusing. Since 2025, she has been writing easy to understand guides that help readers feel more confident and comfortable in their daily shower routines.