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How To Tile Corners [Interior & Exterior Corners]

Tiling your wall corners can be a super difficult task if you have no experience. Because one wrong step can cost you both your money and hard work. That’s why you should be really careful when tiling the wall corners. 

How to tile corners?

Gather the necessary tools first. Preparing the wall after that is essential. Once you’re done with these, tile the interior part. For that, measure and cut the corner trim along with tile. Use an adhesive to place the trim and then the tile on the wall. For your outside corners do the same. Let the adhesive dry afterward and apply grout. 

This is just a tiny portion of the whole tiling process. We’ve provided a step-by-step process for both types of corners. 

Stay with us to know the rest!

How to Tile Corners? 

For a DIYer, this type of job is definitely not a joke. This is why most homeowners call a professional to do the job instead. They don’t care how much it costs. 

But we’re about to change that and help you save money. Even though the task is difficult, it’s not impossible. With a little help from us, it’s possible to tile your corners. 

The entire process will take you around 2 hours. This is a lot less than the time for reinstalling bathroom tiles

That’s why don’t worry! Just check out the material you’ll need-

Required tools

  • Premixed mastic/ thin mortar 
  • Tiles
  • Spacers
  • Corner trims
  • Safety gloves 
  • Safety glasses  
  • Wet saw 
  • Spirit level 
  • Scraper
  • Brush
  • Measuring tape
  • Tile nipper 

Gather all of these quickly so we can start the project. 

Prepare Your Walls 

Once you have the tools, start preparing your walls now. 

For that, look for the areas that are exposed to water. Because in those areas, you need to install a hardibacker. Once done, use thin sets along with paper tapes for sealing the joints. 

Sanding the joints is also important to make them level with your wall. If you don’t do this, your tiles won’t be plumb. 

You might have brick walls in your home. In that case, use a scraper to level the joints. If the joints are level with your wall, brush off the dust and residues from the ground. 

Once the walls are ready, you can start tiling.

Tiling Interior Corners 

There are two ways you can tile your interior walls. One is by using a corner trim and another is without the trims. But here we’ll be focusing on the use of corner trims. 

Because plastic corner trims can surely save a lot of your time and effort. Because you don’t need to measure and cut all the full tiles. Plus you’ll also receive a professional finish this way. 

Step 1: Select the Right Corner Trim

You can find corner trims of different shapes, sizes, and colors. As a result, you’ll have a lot of options. But it’s important to pick the ones that match the design of your tiles. 

Step 2: Measure the Tiles 

Your walls might not be completely vertical. That’s why it’s essential to measure every one of your tiles before you install them. If you see a tile is too wide, adjust it with the help of your tile nipper. 

Here are some suggestions regarding tile nippers-

Product 1
Product 2

Once you have adjusted the tile, you can fit them perfectly on the wall. 

Step 3: Secure Your Corner Trim 

For some areas on the corners, you might have to cut the corner trim. To do that, place your tile corner trim on a miter block. 

Pick the angle at which you have to cut the trim and mark it. For example, you need to cut the trim at a 45° angle for a window corner. 

Once you’ve chosen your angle, cut the corner trim with a wet saw. This is the same wet saw, which is used to cut marble tile to avoid chipping

You have to make 2 cuts at opposing angle cuts. Offer the cuts against your tile and make sure the trim pieces fit properly together. 

You can use a spirit level to check whether the trims are plumb or not. Adjust them if they aren’t. 

It’s time to install the trims. Take your trowel. Use it to apply the adhesive on the area where the trim will be. Push your tile trim into the adhesive now and make sure it’s secured. 

Step 4: Place the Tiles   

Lay all of the tiles on the ground now. Apply the adhesive to your tile’s back. This way you’ll be able to attach the tile to your trim. Make sure the bond between them is strong so that the tile doesn’t fall off. 

Note: If there’s a high chance of the area getting wet, leave a gap of 2 mm between your trim and tile edge. 

Step 5: Apply Grout 

You’re done tilling your wall’s internal corners. But don’t just stop here. You have to start filling the gap between the trim and tiles. 

Use a water-resistant grout to do the job. Make sure to apply the grout properly.

Once you’re done, clean the area and tile thoroughly with any of your dry clothes. Don’t use water on the tiles at all. This will just weaken the adhesive. 

Tiling Outside Corners 

Now that we’re done with the interior part, let’s tile the exterior corners. This job is much easier and takes less time. 

The steps for this are quite similar to the ones of interior corners. But we’ve mentioned them in detail just in case-

Step 1: Adjust Your Outside Trim

You already have an outside corner trim with you. All you have to do now is make sure it fits into the place perfectly. 

For that, check if the trim is vertical with the corner with a spirit level. If not, adjust it with a nipper, cutter, or wet saw. But make sure to mark where you have to cut. 

Follow step 3 of tiling interior corners to do this task properly. 

Step 2: Install the Trims 

Once the trims are perfectly fit together and are vertical with corners, install them. Apply the adhesive on your wall corner. Place the tile trim on the adhesive and push gently so it sticks perfectly. 

You can use the spirit level again to see if the trim is vertical and plumb. If it’s not, you’ll have to adjust it again. 

Step 3: Install Your Tiles 

It’s time to place and secure your tiles on the entire surface of your wall. Use the adhesive to do so. While tiling, make sure there’s a clearance gap. It should be inside your trim, between your tiles, and your corner trims. 

Step 4: Clean the Area & Apply Grout 

We have almost reached the end. Just clean the mess you have created while tilling. Make the tiles spotless with your dry cloth. 

Once the tiles are clean, allow the adhesive to dry for a while. It should take about 1-2 hours. Once the tiles are perfectly stuck to the corners, apply grout. 

Make sure to seal the grout after it’s dry. This way you can prevent the grout from getting dirty and weak. 

That’s it! You are now done with your tiling project.


Question: How to tile interior corners with corner trim?

Answer: Measure the tiles first. Cut the tiles to match one another and the wall space if necessary. Use a wet saw cutting tiles. Once the tiles are ready, apply your tile adhesive to the wall or on the back of your tile. Place the tiles on the wall while leaving ⅛” clearance space. Use caulk afterward to fill the corner gap. 

Question: Should I start from the corner while tiling? 

Answer: Yes, that’s what most people do. They start tiling from the corner that’s opposite to your door. Gradually they reach the last point. Starting from the corners will give you a benefit. You can evenly tile the whole area with full tiles. 

Question: Should I put adhesive on the wall or tile?

Answer: You can do either of them. Or you can just do both. Putting adhesive on both the back of the tiles and the wall will ensure a secure bond. You must follow this at all costs if your tile is too heavy. Otherwise, it’ll just fall and break. 

Final Words 

We’ve run out of info. Because everything we knew on tiling corners has been provided. Hopefully, you’ve got the help you were looking for. 

All the steps might be impossible for you to perform if you have no experience. In that case, always seek the advice and help of a professional!

Good luck with your tiling project!