How To Tile An Outside Corner

So, there I was, staring down a particularly stubborn outside corner on my patio project. Sun beating down, the faint scent of mortar in the air, and a growing feeling that this little jutting bit of brick was actively plotting against me. You know the one, right? The one where two walls decide to do a dramatic tango and then abruptly turn outward, leaving you with… well, a puzzle. I’d handled inside corners like a champ, and straight runs were a breeze. But this outside corner? It felt like the final boss of my tiling adventure.
I’d seen it done in glossy magazines and on those perfectly curated DIY blogs, and it always looked so effortless. Just a few perfectly mitered cuts, a dab of adhesive, and poof, a seamless finish. My reality involved more squinting, more second-guessing, and a brief, existential crisis about whether I should have just hired a professional. Spoiler alert: I didn’t. And neither should you, because while it might seem daunting, tiling an outside corner is totally doable. It just requires a little patience, a bit of precision, and maybe a good playlist to keep your spirits up.
Let's dive into how we can conquer this architectural beast together, shall we? Forget those intimidating diagrams and overly technical jargon. We’re going to break it down, step-by-step, like we’re just chatting over a cup of (probably cold by now) coffee.
The Mighty Outside Corner: Why It's Kinda a Big Deal
Okay, so why is this particular corner getting all the attention? Think about it. Inside corners are relatively forgiving. The tiles just sort of meet, and the grout does its thing, filling in any minor imperfections. It's like a gentle hug between two surfaces. But an outside corner? This is where things get exposed. It’s the sharp edge, the visible junction. If it's not done right, it's not just unsightly; it can be a snagging hazard (imagine stubbing your toe on a rogue tile edge!) and a potential entry point for water and debris.
We want that corner to look clean, crisp, and professional. We want it to say, "I meant to do this, and I did it well." No wobbly edges, no chipped tiles sticking out like a sore thumb. It’s the finishing touch that really elevates a tiling job from "homemade" to "wow, who did that?!"
Gathering Your Arsenal: What You'll Need
Before we even think about cutting, let's make sure you've got all your ducks in a row. This isn't just about the tiles themselves. Think of it like prepping for a culinary masterpiece – you need the right ingredients and the right tools.

- Your Tiles, Of Course! Make sure you have enough, plus a little extra for mistakes (and believe me, we all make them). Measure twice, cut once, remember?
- Tile Adhesive/Mortar: Whatever your project calls for. Make sure it's appropriate for exterior use if you're doing a patio or an outdoor wall.
- Grout: Again, outdoor-friendly is key.
- Tile Cutter: This is your best friend for straight cuts.
- Wet Saw: For those trickier angles. If you don’t have one, you can often rent them. Trust me, it’s worth it for outside corners. You could try a manual tile nipper for small, fiddly bits, but for a clean, straight miter, a wet saw is the way to go.
- Measuring Tape: Duh. But a good, accurate one.
- Pencil or Marker: For marking your cuts.
- Spirit Level: To ensure everything is straight and true.
- Notched Trowel: For spreading the adhesive evenly.
- Spacers: To keep your grout lines consistent.
- Rubber Grout Float: For pushing grout into those gaps.
- Sponges and Bucket of Water: For cleaning up excess grout.
- Safety Glasses: Seriously, don't skip these. Tile dust is no joke.
- Gloves: To protect your hands from adhesive and grout.
- A Helper (Optional but Highly Recommended): Tiling can be a solo sport, but for outside corners, an extra set of hands can make a world of difference. Just sayin'.
Got all that? Good. Now, let’s talk about the technique.
The Art of the Miter: Beveling Your Way to Perfection
This is where the magic (and the potential for frustration) happens. For a clean outside corner, you're essentially going to be creating a "mitered" joint. Imagine two pieces of trim meeting at a 45-degree angle – that’s what we’re aiming for with our tiles.
Method 1: The Mitered Cut (The "Pro" Look)
This is the gold standard, the method that gives you that seamless, almost liquid-looking transition. It’s all about getting two tiles to meet at a perfect 45-degree angle.

- Measure Carefully: This is paramount. Measure the length of the run up to the corner on both sides.
- Mark Your Tiles: Now, this is the tricky part. You need to mark your tiles for a 45-degree cut. On one tile, you'll mark a line that goes from one corner to the opposite corner at a 45-degree angle. On the other tile, you'll do the same, but the angle will be mirrored.
- The Miter Cut: This is where your wet saw comes in. Adjust the blade on your wet saw to a 45-degree bevel. You'll then carefully cut along your marked line. This requires a steady hand and a bit of practice. Don't rush this step!
- Test Fit: Before you commit to adhesive, bring the two mitered tiles together. They should meet perfectly at the corner, forming a crisp, clean 90-degree angle. If there's a small gap, it's usually okay, as the grout will fill it. But a big gap? You might need to re-cut.
- Apply Adhesive: Once you're happy with your test fit, spread a thin, even layer of tile adhesive onto the back of both tiles using your notched trowel. Make sure to get good coverage, especially on the edges.
- Set the Tiles: Carefully press the two mitered tiles into place, ensuring they meet at the corner. Use your spirit level to check that they are straight and flush with the surrounding tiles.
- Add Spacers: Place your tile spacers where they'll meet the adjacent tiles to maintain consistent grout lines.
- Let it Cure: Allow the adhesive to cure completely according to the manufacturer's instructions. This is not the time to get impatient!
This mitered method looks fantastic, but it's definitely the more challenging option. It requires a good wet saw and a bit of confidence with power tools. If you're a beginner, or if your tiles are particularly thick or brittle, you might want to consider an alternative.
Method 2: The Bullnose or Edge Trim (The "Easier" Way)
Don't want to wrestle with a wet saw? No problem! Many tile lines come with special "bullnose" or edge trim pieces designed specifically for outside corners. These pieces have a rounded, finished edge, so you don't need to miter them.
- Identify Your Corner Piece: Look for a tile with a rounded edge that’s meant to turn the corner. They usually come in 90-degree angles.
- Measure and Cut (if necessary): You'll still need to measure the length of your run. You might need to cut the straight edge of the bullnose piece to fit your run. This can often be done with a standard tile cutter.
- Apply Adhesive: Spread adhesive on the back of the bullnose piece and the wall/surface where it will go.
- Set the Tile: Press the bullnose piece firmly into place. Ensure it’s level and flush with the surrounding tiles.
- Continue with Adjacent Tiles: You’ll then butt your regular field tiles up against the bullnose piece. The rounded edge of the bullnose will create a smooth, finished transition.
- Grout: Grout as usual. The bullnose will naturally cover the edge of your field tiles.
This is a much more forgiving method and is excellent for beginners. It sacrifices that perfectly seamless mitered look for a simpler, equally effective finish. Plus, those rounded edges can be much kinder to bare feet!

Method 3: The Overlap (A Quick Fix, Use with Caution!)
This isn't my favorite method, and I wouldn't use it for a high-traffic or visually critical area, but it is an option for very small, less noticeable corners, or if you're really in a pinch. It involves overlapping one tile over the edge of another.
- Tile One Side: Tile one wall up to the corner, letting the last tile extend slightly past the corner.
- Tile the Other Side: On the adjacent wall, tile up to the corner and let that last tile overlap the edge of the first tile.
- Grout: You’ll need to be extra careful with your grouting here to fill the small gap and create a reasonably smooth transition.
This method can look a bit clumsy if not done perfectly. The overlap can catch things, and it's not the cleanest look. I'd only recommend this if you absolutely can't use a miter or a bullnose. Think of it as the duct tape of tiling – gets the job done, but it's not pretty.
Grouting and Finishing: The Grand Finale
So, your tiles are set, the adhesive is dry, and you’re ready for the final act: grouting. This is where everything comes together and that corner starts to look like a million bucks.

- Mix Your Grout: Follow the manufacturer’s instructions precisely. You want a smooth, peanut-butter-like consistency. Too watery and it’ll run everywhere; too dry and it’ll be hard to work with.
- Apply the Grout: Using your rubber grout float, scoop up a generous amount of grout and spread it over the joints. Work at a 45-degree angle to the tiles, forcing the grout deep into the gaps. Make sure to get good coverage along the corner joint.
- Wipe Off Excess: This is where the sponges come in. With a damp (not soaking wet!) sponge, gently wipe away the excess grout from the tile surfaces. Rinse your sponge frequently in your bucket of clean water. Work in a circular motion, then a straight motion, to avoid pulling grout out of the joints.
- The Second Wipe: After a few minutes, when the grout has started to firm up a bit, go back over the tiles with a clean, damp sponge for a final wipe.
- Buffing: Once the grout has fully dried (check the manufacturer's instructions, usually 24-48 hours), you might notice a slight haze on the tiles. Buff this off with a soft, dry cloth for a polished finish.
And there you have it! You’ve tackled the dreaded outside corner. Give yourself a pat on the back. You deserve it.
A Few Extra Tips from My Own Battles
As you can probably tell, I've had my share of wrestling matches with tile corners. Here are a few things I’ve learned along the way that might save you some grief:
- Practice Cuts: If you're going the miter route, grab some spare tiles and practice your 45-degree cuts on those first. Get a feel for the wet saw and how it handles the material. Seriously, practice makes perfect here.
- Patience is Key: I know I’ve said it a million times, but it bears repeating. Tiling, especially tricky bits like outside corners, is not a race. Take your time, be methodical, and don’t get discouraged if it’s not perfect on the first try.
- Clean as You Go: It’s so much easier to clean up small bits of adhesive and grout as you’re working than to try and scrape off dried-on messes later. Keep those sponges and buckets handy!
- Grout Color Matters: The color of your grout can significantly impact how your corner looks. A darker grout can hide minor imperfections better than a very light grout. Think about the overall aesthetic you're going for.
- When in Doubt, Use Bullnose: If you’re new to tiling, or if you’re just feeling a bit intimidated, don’t be ashamed to opt for the bullnose pieces. They look great and are much more forgiving. There’s no shame in making your life easier!
- Don't Be Afraid to Ask for Help: If you have a friend who’s a seasoned DIYer or even a tile pro, pick their brain! A few minutes of expert advice can save you hours of frustration.
Tiling an outside corner might have felt like the Everest of your tiling project, but you've made it to the summit. With a little preparation, the right tools, and a healthy dose of patience, you can achieve a professional-looking finish that will make your project shine. Now go forth and tile with confidence! And maybe celebrate with a well-deserved beverage. You've earned it!
