How to Install Quarter Round Molding: A Comprehensive Guide

How To Install Quarter Round Molding

If you’re looking to add some finishing touches to your home, quarter round molding is a great option. This small but essential piece of trim can help give your baseboards and floors a polished look. However, before you start the installation process, it’s important to understand the basics of how to install quarter round molding.

In this comprehensive guide, we’ll take you through everything you need to know to install quarter round molding like a pro. From the tools and materials you’ll need to the step-by-step process, we’ve got you covered. So, let’s get started!

Tools and Materials Needed

Cutting quarter round molding to fit the desired length
Cutting quarter round molding to fit the desired length

Before you begin installing quarter round molding, it’s important to gather all the necessary tools and materials. Here’s a list of what you’ll need:


  • Measuring tape
  • Miter saw or miter box and handsaw
  • Brad nailer or hammer and finishing nails
  • Caulk gun
  • Sandpaper or sanding block
  • Paintbrush or foam roller
  • Paint or stain


  • Quarter round molding
  • Wood filler
  • Caulk
  • Primer

When selecting your quarter round molding, make sure to measure the length of the space where it will be installed to ensure you purchase enough. It’s also important to choose the correct type of molding for your project. For example, if you’re installing quarter round molding on a curved surface, you may need to purchase flexible molding.


Before you begin installing the quarter round molding, you’ll need to prepare the area. Here’s how:

Measuring the Area

Use a measuring tape to determine the length of the space where you’ll be installing the quarter round molding. Make sure to measure each wall separately as they may not be the same length.

Cutting the Quarter Round Molding

Using a miter saw or miter box and handsaw, cut the quarter round molding to the appropriate length. Make sure to cut the ends at a 45-degree angle to ensure a seamless fit at the corners.

Sanding and Priming the Molding

Once the molding is cut to the correct length, use sandpaper or a sanding block to smooth out any rough edges. After sanding, apply a coat of primer to the molding. This will help the paint or stain adhere better and ensure a smooth finish.

Installation Process

Now that the preparation is complete, it’s time to start installing the quarter round molding. Here are the steps to follow:

Starting at the Corner

Begin at the corner of the room and work your way around the perimeter. This will help ensure a seamless installation.

Attaching the Molding to the Baseboard

Using a brad nailer or hammer and finishing nails, attach the quarter round molding to the baseboard. Be sure to nail it securely but not too tightly, as this can cause the wood to split.

Filling the Nail Holes

After the molding is installed, use wood filler to fill in the nail holes. Once the filler has dried, sand it down to ensure a smooth finish.

Painting or Staining the Molding

Finally, you can paint or stain the quarter round molding to match your baseboards or floors. Use a paintbrush or foam roller and apply two coats of paint or stain, allowing each coat to dry completely before applying the next.

By following these steps, you can easily install quarter round molding in your home and achieve a professional-looking finish.

Tips and Tricks

When it comes to installing quarter round molding, there are a few tips and tricks that can make the process easier and help you achieve a professional-looking finish. Here are some things to keep in mind:

Dealing with corners and angles

Installing quarter round molding around corners and angles can be tricky. To ensure a tight fit, it’s important to measure the angle accurately and then cut the molding accordingly. You can use a miter saw or a miter box and handsaw to make the cuts. You may also need to make relief cuts along the back of the molding to help it bend around tight corners.

How to properly secure the molding

To ensure your quarter round molding stays securely in place, it’s important to use the right type of fasteners. A brad nailer is a great tool for this job, as it allows you to quickly and easily attach the molding to the baseboard without leaving visible nail holes. If you don’t have a brad nailer, you can use finishing nails and a hammer, but be sure to countersink the nails and fill in the holes with wood filler.

How to avoid common mistakes

One common mistake people make when installing quarter round molding is not leaving enough space for expansion and contraction. It’s important to leave a small gap between the molding and the baseboard to allow for movement as the temperature and humidity levels change. Another mistake is not sanding and priming the molding before painting or staining. This can lead to a less-than-perfect finish and may cause the paint or stain to peel or chip over time.


Installing quarter round molding is a simple and affordable way to add a finishing touch to your home. By following the steps outlined in this guide, you can achieve a professional-looking result that will enhance the appearance of your baseboards and floors.

To recap, you’ll need to gather the necessary tools and materials, measure the space, cut and sand the molding, attach it to the baseboard, fill in the nail holes, and paint or stain the molding. Along the way, be sure to keep in mind our tips and tricks for dealing with corners and angles, properly securing the molding, and avoiding common mistakes.

In conclusion, we encourage you to try installing quarter round molding on your own. With a little patience and attention to detail, you can achieve a beautiful result that will make your home look and feel more complete.