Finding the right corner thin brick is usually the hardest part of a DIY masonry project because it's what actually makes the wall look real. Most people start off thinking they can just buy a bunch of flat brick veneers and call it a day, but the moment you hit an external corner or a window frame, the illusion of a solid brick wall falls apart. If you just butt two flat pieces together at a 90-degree angle, you're left with an ugly seam that screams "this is a sticker." That's exactly why those L-shaped corner pieces are so vital.
I've seen plenty of home renovations where the homeowner tried to save a few bucks by skipping the corners. They figured they could just grout over the gap. It never works. It looks like a DIY project gone wrong. If you want that classic, heavy, "this house has been here for a hundred years" vibe, you need the corner pieces to wrap around the edges. It gives the appearance of a full-depth brick without the back-breaking labor or the need for a massive concrete footer to support the weight.
Why the L-Shape Changes Everything
The magic of corner thin brick is all in its shape. Instead of a flat tile, it's manufactured or cut into an "L" that fits perfectly over the edge of your drywall or cement board. When you look at it from the side, you see the "header" of the brick (the short end) and from the front, you see the "stretcher" (the long side). This mimics the way a traditional mason would lay full bricks, alternating them to tie the wall together.
It's a bit of a psychological trick. Our brains are used to seeing brick as a structural element. When the corners look solid, your brain just assumes the rest of the wall is too. It adds a sense of permanence to a room. Whether you're doing a fireplace surround or a kitchen backsplash, those corners provide the depth that flat tiles simply can't achieve. Plus, it makes the transition to the next wall look seamless.
Choosing Your Material
You'll run into a few different types of corner thin brick when you start shopping. Some are made from real, reclaimed bricks that have been sliced down. These are my favorite because they have all the character, chips, and color variations of the original building they came from. They feel authentic because, well, they are.
Then you have manufactured thin bricks, which are usually made from kiln-fired clay just like regular bricks, just thinner. These are great if you want a very specific, consistent color across the whole wall. Finally, there's the concrete-based version. These are often cheaper and come in some wild colors, but they can sometimes look a bit "stamped" if the manufacturer isn't careful. If you're going for a rustic look, stick with the clay or reclaimed options. The way they catch the light on the corners just feels more natural.
The Installation Game Plan
If you're planning to do this yourself, there is one golden rule: always start with the corners. I can't emphasize this enough. If you start in the middle of the wall and work your way out, by the time you reach the edge, your horizontal lines might not line up with the corner pieces. It's a nightmare to fix.
Instead, you want to dry-fit your corner pieces first. Set them up, check them with a level, and make sure they're perfectly vertical. Once your corners are set, you can run a string line or use a laser level to fill in the flat bricks between them. This ensures that every row (or "course") stays straight. It's much easier to trim a flat brick in the middle of a wall than it is to try and fudge a corner piece to fit a crooked line.
Also, don't forget the "stagger." You want to flip the orientation of your corner thin brick as you go up. One row should have the long side facing left, and the next row should have the long side facing right. This prevents a vertical line from forming right next to the corner, which is a dead giveaway that the wall isn't structural.
Mortar and Grout Styles
The brick itself is only half the battle. The way you finish the joints between your corner thin brick pieces determines the final style. If you want a clean, modern look, you'll want to use a grout bag to neatly fill the joints and then "rake" them out so they're recessed. This creates a sharp shadow line that looks very architectural.
On the other hand, if you're after that old-world, European farmhouse look, you might want to try an "over-grout" or a "German smear" technique. This is where you let the mortar spill out over the edges of the brick a bit. It's messy, it's tactile, and it looks incredible on corners. Because the corner pieces stick out, the over-grouting really highlights the texture of the brick. Just be prepared—it's a lot of work to get the "perfectly messy" look.
Common Mistakes to Avoid
One of the biggest mistakes I see people make with corner thin brick is forgetting about the thickness of the adhesive. If you apply too much thin-set or mastic behind the corner, it'll kick the brick out too far, and it won't sit flush with the flat bricks. You want a nice, even coat. I usually recommend back-buttering the corner pieces—basically spreading the adhesive on the back of the brick like peanut butter—to make sure you get a solid bond without a huge mess.
Another thing is the cutting. You're inevitably going to need to cut some of these pieces. Please, do yourself a favor and rent a wet saw. You might think you can get away with a grinder and a diamond blade, but you'll end up with a cloud of red dust that will haunt your house for a decade. A wet saw keeps the dust down and gives you those crisp, clean edges that make the corners look professional.
Where to Use Them
Where doesn't a brick corner look good? A popular spot right now is the "mudroom" or entry accent wall. It's a high-traffic area, and brick is incredibly durable. It can take a beating from boots and bags and still look great.
Kitchen islands are another prime candidate. Wrapping an island in brick with proper corner thin brick edges makes it look like a structural hearth. It grounds the kitchen and adds a ton of warmth. Just make sure to seal the brick if it's in a kitchen—tomato sauce and porous clay are not a good mix. A simple matte sealer will keep the look while protecting the material from stains.
The Cost Factor
I won't lie to you: the corner pieces are more expensive than the flat ones. Usually, they're sold by the linear foot rather than the square foot. It might tempt you to try and "fake it" or only use them on one side, but trust me, it's worth the investment. The cost of the corner thin brick is a small price to pay for a result that actually looks like real masonry. If you're going to spend the time and money to renovate a space, you might as well do it in a way that doesn't look like a temporary fix.
Wrapping It Up
At the end of the day, using corner thin brick is about commitment to the aesthetic. It's that extra 10% of effort that makes 90% of the visual impact. It turns a flat, boring wall into a feature with texture, history, and depth. Whether you're going for a gritty industrial loft style or a cozy cottage feel, those corners are what tie the whole thing together.
Just take your time, level your corners first, and don't be afraid to get a little messy with the grout. Once it's finished and the furniture is back in place, you'll look at those corners and realize that the extra bit of planning was the best decision you made for the room. There's just something about the way a solid-looking brick corner catches the light that makes a house feel like a home.