How to Install Crown Molding

Nothing enhances interior appeal like custom crown molding. Here is a step-by-step guide for self-installation.

 

1. Choose Your Style

 

Wood molding is rather pricey, so be sure to research the exact kind you want. Some owners choose to go with MDF material to lower costs or enjoy a pre-primed surface. However, this option is not appropriate for moisture-prone areas like the kitchen or bathroom. You also want to determine what breadth you want. This is the face size of your molding. In general, a two to five-inch breadth is sufficient for an average-sized room with an eight-foot ceiling. For ceilings over 14 feet, you want at least eight inches.

Image via Directbuy.com

 

2. Take Your Measurements

 

Measuring for your project should not be difficult, but there are a few tricks to this. Measure your walls to the nearest inch and sketch a diagram on a blank sheet of paper. For two inside corners, simply mark down the lengths of each wall. For outside corners, or angles over 180 degrees, you want to add the width of the molding to your measurement. Double that distance if you have outside corners on both ends.

 

3. Cut Your Corners

 

Molding requires two basic types of cuts – inside corners and outside corners. Both require a miter saw. Essentially, you will be making four main cuts – inside left, inside right, outside left, and outside right. To cut a 45-degree angle, use a c-clamp to position a stop block. Then, place your molding piece upside down, set the saw to 45 degrees, and cut a return end. Then, rotate your saw to the opposite angle for a second cut on the other end. The procedure is the same for irregular angles. All you need to do is change the angle of your saw.

 

4. Prepare for Installation

 

Most crown molding features some type of design, and when you make the proper cuts, your corners pair seamlessly together. However, the point where you last piece meets your first piece does not always end up looking as fluid. Therefore, it’s a good idea to start in the corner that is the least visible. When using plain molding, your starting point is not as critical. Moreover, if you plan to paint your molding, it’s better to do so before mounting your cuts to the wall.

 

5. Mount Molding to Your Wall

 

Before putting up your molding, be sure to apply a small bead of polyurethane adhesive to the sections that will be in contact with both the wall and the ceiling. Likewise, add another bead to corners that will be joined together. Wipe off any excess using mineral spirits. This layer of adhesive prevents the molding pieces from separating over time due to the natural expansion and contraction of your structure.

 

While the adhesive sets, use a pneumatic finishing nail gun to attach the molding permanently to the wall. Make sure to adjust the power setting to ensure the nails are driven to just below the surface. You can also do this by hand using a nail punch. Don’t ever force a piece onto an uneven wall, as no surface is completely straight. When you have finished installing the pieces, use a painters caulk to cover any holes, gaps or imperfections. This is an easy way to achieve a more finished look.

 

With a little knowledge and the right set of tools, installing crown molding is a great way to add beauty to any small or large living space.