How Do You Make Crown Molding Corner Blocks

How Do You Make Crown Molding Corner Blocks In Easy 6 Steps

Crown molding is a beautiful way to add detail and character to a room. But, installing crown molding can be tricky, especially concerning corners. The solution?

The corner blocks for crown molding. These small pieces of wood can create a seamless look when two pieces of crown molding meet at a corner.

Here, we will walk you through the steps to how do you make crown molding corner blocks so you can add a professional touch to your next home improvement project.

Here Is How Do You Make Crown Molding Corner Blocks

Here Is How Do You Make Crown Molding Corner Blocks

Materials Needed

To construct crown molding corner blocks, you will need the following materials:

Wood: You will need a piece of wood at least 1 inch thick and wide enough to cover the crown molding corner. The length of the wood will depend on the size of your corner.

Saw: You will need a saw to cut the wood to the desired shape. A miter saw or circular saw is recommended.

Sandpaper: You will need sandpaper to smooth the edges of the wood.

Stain or paint: You will need stain or paint to finish the wood.

Measuring the Corner

The first step in making crown moulding corner blocks is to measure the corner where the crown molding will be installed. This is important to ensure that the corner blocks fit properly and form a seamless transition.

To measure the corner, use a tape measure to determine the length and height of the corner. The length is the distance between the two walls at the corner, and the height is the distance from the floor to the ceiling. Record these measurements so you can cut the wood to the correct size.

Cutting the Wood

Once you have measured the corner, it’s time to cut the wood accordingly for the corner block. You will need to cut two pieces of wood for each side of the corner.

To cut the wood, use a saw to create a triangular shape with one angle at 90 degrees. The other two angles will be the same as the angle of the corner where the crown molding will go. Use the measurements you recorded earlier to create the triangular shape.

After you have trimmed the wood and shape, use sandpaper to smooth out the edges. This will help create a seamless transition between the corner blocks and the crown molding.

Sanding and Finishing

Before installing the outside corner blocks, it’s important to sand and finish the wood. This will not only create a smooth surface, but it will also give the wood a professional look.

Start by using coarse sandpaper to remove any rough spots on the wood. Then, switch to fine sandpaper to create a smooth surface. Be sure to sand the edges of the wood as well.

After sanding, you can finish the wood with stain or paint. If you choose to stain the wood, apply the stain with a brush or cloth and wipe away any excess. Allow the stain to dry before applying a second coat if necessary.

If you paint the wood, apply it with a brush or roller and allow it to dry completely.

Installing the Corner Blocks

Now that you have measured, cut, sanded, and finished the corner blocks, it’s time to install them. Here are the steps to follow:

  • Apply a small amount of construction adhesive to the back of the corner block.
  • Align the corner block with the corner to be covered by crown molding.
  • Use a nail gun or finishing nails to secure the corner block to the wall.
  • Repeat the process for the other side of the corner.
  • Install the crown molding as you normally would, butting it up against the corner blocks.

Using Crown Molding Corner Blocks

With the crown corners in place, you can now proceed to install the crown molding. The corner blocks provide a seamless transition between the two pieces of crown molding, creating a professional and polished look. Plus, corner blocks save time and frustration in installation.

It’s important to note that not all corners require corner blocks. If the corner angle is not sharp or the walls are not at a perfect 90-degree angle, you may be able to install the crown molding without using corner blocks. But, corner blocks can be a game changer for corners that require a precise fit.

Data Table: Crown Molding Corner Block Sizes

Here is a data table that provides the recommended sizes for crown molding corner blocks based on the height of the ceiling:

Ceiling Height (ft)Corner Block Size (inch)
84 x 4 x 5.66
94.5 x 4.5 x 6.36
105 x 5 x 7.07
115.5 x 5.5 x 7.78
126 x 6 x 8.49

Note: These sizes are recommendations only. Be sure to measure your corner and adjust the size of the corner blocks accordingly.

What Are the Benefits of No-Miter Crown Molding?

No-miter crown molding is a popular alternative to traditional crown molding installation methods. Unlike traditional methods that require precise miter cuts to fit the corners, no-miter crown molding uses pre-cut corner blocks that eliminate the need for mitering.

Here are the features of no-miter crown molding and why it may be the right choice for your next home improvement project.

Easy Installation

No-miter crown molding is easy to install, even for beginners. With pre-cut corner blocks, you don’t have to worry about fitting the molding into tight corners or making precise miter cuts. The installation process is straightforward and can be completed in less time than traditional methods.


While no-miter crown molding may have a higher upfront cost than traditional molding, it can save you money in the long run. Traditional crown molding installation methods require additional tools and materials, such as a miter saw and specialized corner blocks, which can add up quickly. With no-miter crown molding, you only need the molding and pre-cut corner blocks, saving you money on additional tools and materials.

Professional Look

No-miter crown molding provides a polished, professional look without the hassle of traditional installation methods. By using pre-cut corner blocks, the molding fits together seamlessly, creating a smooth transition between the two pieces.

The finished product looks like it was installed by a professional, even if you’re a beginner.


No-miter crown molding is versatile and can be used in various home improvement projects. Whether you’re updating a room, installing crown molding for the first time, or looking for a more efficient installation method, no-miter crown molding can be the right choice.


One of the most significant benefits of no-miter crown molding is the time it saves. With pre-cut corner blocks, installation is much faster than traditional methods.

You don’t have to spend time making precise miter cuts or struggling to fit the molding in tight corners. Instead, you can focus on completing the project quickly and efficiently.

How Do You Install Polyurethane Crown Molding?

How Do You Install Polyurethane Crown Molding

Polyurethane crown molding block is a popular material for home improvement projects. It is lightweight, durable, and easy to install. Here are the steps for installing polyurethane crown molding in your home.

Materials Needed:

  • Polyurethane Crown Molding
  • Adhesive (Construction Adhesive)
  • Caulk (Paintable Caulk)
  • Measuring Tape
  • Pencil
  • Saw (Miter Saw)
  • Sandpaper (120-grit)
  • Ladder
  • Paint or Stain (optional)

Step 1: Measure the Room

Measure the length of each wall where you plan to install the crown molding corner block. Add up the total length of all the walls and add 10% to account for any waste. This will give you the amount of crown molding you need to purchase.

Step 2: Cut the Crown Molding

Cut the crown molding to the appropriate lengths for each wall using a miter saw. Make precise cuts and angle the ends to match the corners where the molding will meet. Sand the cut ends of the molding with 120-grit sandpaper to remove any rough edges.

Step 3: Apply Adhesive

Apply a bead of construction adhesive along the back of the crown molding. Apply the adhesive in a zig-zag pattern to ensure a strong bond.

Step 4: Install the Crown Molding

Carefully press the crown molding into place along the wall, using a ladder if necessary. Hold the molding in place for a few seconds to allow the adhesive to bond.

Step 5: Secure the Crown Molding

Using a finish nailer, nail the crown molding to the wall at 12 to 18 inches intervals. Be sure to nail into the studs or blocking behind the drywall to ensure a secure installation.

Step 6: Fill the Nail Holes

Fill the nail holes and any gaps between the wall and the crown molding using paintable caulk. Smooth the caulk with a wet finger or caulk smoothing tool. Allow the caulk to dry for 24 hours.

Step 7: Paint or Stain (optional)

If desired, paint or stain the crown molding to match the room’s wall decor. Painting or staining the crown molding is a great way to enhance the look of the room and make it more cohesive with the wall decor.


Crown molding corner blocks are a simple yet effective way to add an elegant touch to your home improvement projects.

By measuring, cutting, sanding, finishing, and installing the corner blocks, you can create a seamless transition between two pieces of crown molding.

Plus, using corner blocks can save you time and frustration during installation. With these steps and recommendations, you’ll be on your way to creating beautiful, polished crown molding in no time.

Leave a Comment

Your email address will not be published. Required fields are marked *