How to Install 3/4 Quarter Round Molding Trim

The change in height from one type of flooring to another, such as carpet to hardwood flooring, often creates a gap between the thinner floor and the baseboards, which are installed at the same height around the home regardless of flooring height. The gap between the baseboards and lower-height flooring is usually covered with quarter-round molding in either a 1/2- or 3/4-inch width, depending on the size of the gap. Quarter-round molding is small, light and fairly easy to work with, requiring only a few specialty tools for proper installation.

Step 1

Measure the wall for the length of molding needed.

Step 2

Cut the 3/4 round molding to fit the length needed. If the molding will continue around a corner, make a mitered cut at a 45-degree angle at each end of the molding, so that the molding on the adjacent wall fits flush together at the corner. The most efficient method for making mitered cuts is using a miter saw or table saw with a miter gauge.

Step 3

Place the molding against the baseboard to assess the fit. Make any adjustments to the cut necessary for the molding to fit flat against the baseboard.

Step 4

Nail the molding into the baseboard using a pneumatic nailer and 2-inch wire nails. Wire nails create less wood splitting and leave only a tiny hole to patch.

Step 5

Cut and install molding on all the remaining walls using the same method.

Step 6

Fill the wire nail holes with a bit of wood putty, applied with a small plastic putty knife.

Step 7

Sand the patched holes by hand with fine-grit sandpaper and wipe away the sanding dust with a microfiber cloth.

Step 8

Touch up the patched holes with the paint or stain used on the molding.


  • Always wear safety glasses when using a power saw or pneumatic nailer.

About the Author

Kaye Morris has over four years of technical writing experience as a curriculum design specialist and is a published fiction author. She has over 20 years of real estate development experience and received her Bachelor of Science in accounting from McNeese State University along with minors in programming and English.