How to Install Exterior Dentil Molding for a Classic Look?

Exterior dentil molding is a great way to add a classic and timeless look to your home’s exterior. Dentil molding is a decorative trim piece, usually made of wood or vinyl, that is used to line the edges of roofs and walls, or to accentuate the edges of doors and windows. Installing exterior dentil molding is a relatively simple process that can be completed in just a few hours. With the right tools, materials, and instructions, you can have an elegant and classic look to your home’s exterior in no time. By following these steps, you can quickly and easily install exterior dentil molding for a classic look.

Gather Necessary Materials for Installing Exterior Dentil Molding

Before beginning the exterior dentil molding installation, it is important to gather the necessary materials. The materials needed will vary depending on the size and design of the exterior dentil molding, as well as the type of structure it is being installed on. Common materials needed include the exterior dentil molding itself, a measuring tape, a saw, a level, a hammer, nails, and adhesive. If the exterior dentil molding is being installed on a wooden structure, wood screws and wood glue may also be needed. It is important to ensure that all of the materials needed are gathered before beginning the installation process.

Measure and Cut Exterior Dentil Molding to Desired Size

Before beginning the installation of exterior dentil molding, it is important to measure and cut the molding to the desired size. Measure the area where the molding will be installed and cut the molding using a saw or miter box. For added accuracy, use a framing square to make sure the angle of the cut is precise. If the area is a curved or irregular shape, use a jigsaw to cut the molding to the desired shape. When cutting the molding, it is important to allow for a slight overhang so that the molding can be easily attached to the structure. Once the molding has been cut to the desired size, it is ready to be installed.

Install Starter Course in Exterior Dentil Molding

Exterior dentil molding is a classic accent that adds a touch of class to any home. It is typically installed below the eaves, along the gable ends, and around the windows and doors. The first step in properly installing the dentil molding is to install the starter course. This is done by measuring the length of the area where the molding will be installed, then cutting the starter course with a miter saw. The starter course should be cut to the exact length as the area to which it is being attached. Once the starter course has been cut, it should be attached to the structure with nails or adhesive.

Secure Exterior Dentil Molding to Structure

The first step in installing exterior dentil molding is to secure the molding to the structure. This is typically done by using a combination of nails and adhesive. Nails should be spaced about 8 to 10 inches apart and should be long enough to penetrate both the structure and the back of the molding. The adhesive should be applied liberally along the back of the molding and pressed firmly against the structure. If possible, it’s best to let the adhesive dry for 24 hours before moving on to the next step. This will ensure that the molding is firmly attached to the structure and won’t come loose over time.

Cut and Fit Exterior Dentil Molding Around Corners and Window/Door Openings

Exterior dentil molding is a decorative trim that is used to enhance the look of a home’s exterior. It is usually made of wood or plastic and is available in a variety of styles and finishes. Installing exterior dentil molding requires a few steps, including cutting and fitting the molding around corners and window/door openings. This process can be tricky and requires patience and careful attention to detail. Before beginning, it is important to measure and mark the area where the molding will be installed and then cut the molding to the correct size. The molding should then be fitted around the corners and openings and checked to make sure that it fits properly. If the fit is not perfect, minor modifications may be necessary to ensure a snug, secure fit. Once the molding is cut and fitted correctly, it is ready to be attached to the structure. 

Attach Exterior Dentil Molding with Nails or Adhesive

Adding exterior dentil molding to your home can be a great way to transform the look of your home’s facade. Before you begin, it’s important to understand the right way to attach the molding to ensure the best results. Nails and adhesive are two popular options for attaching molding. Nails are the most popular choice because they are affordable and they provide a strong, secure hold. When using nails, it’s important to use the right size nail for the project. Using a nail that is too small won’t provide a secure hold while using a nail that is too large can cause the molding to crack. When using nails, it’s also important to use the right type of nail. Hot-dipped galvanized nails are a great option because they are resistant to corrosion and won’t rust.

Apply Caulk to Seal Exterior Dentil Molding to Structure

Applying caulk is one of the best ways to seal exterior dentil molding to a structure. Caulk is a liquid material that is used to fill gaps, cracks, and other voids. It is designed to form a tight seal that will resist water, air, and other elements that can damage the structure. The process of applying caulk to seal exterior dentil molding requires the use of a caulking gun. The caulking gun allows you to control the flow of the caulk and ensure that it is applied evenly.

The first step is to clean the area where the caulk will be applied. This can be done using a putty knife, wire brush, or another tool. Once the area is clean, the next step is to apply the caulk to the surface. It is important to apply the caulk in a continuous line along the molding. Make sure that the caulk is pressed firmly into the gap between the molding and the structure. Once the caulk is applied, allow it to dry for the length of time indicated in the manufacturer’s instructions. Once the caulk is dry, it will form a tight seal between the molding and the structure. This will help to protect the structure from water, air, and other elements. Applying caulk to seal exterior dentil molding is an easy process that can be done in a matter of minutes.


Installing exterior dentil molding is a great way to add a classic look to any home. It adds a touch of elegance and sophistication, while still remaining true to the traditional style of the home. The installation process is relatively simple and straightforward, requiring basic carpentry skills and basic tools. It is important to take accurate measurements and use the right materials for the job in order to ensure that the installation is successful.

Overall, installing exterior dentil molding can be a relatively easy and rewarding project, provided that the right tools and materials are used, and accurate measurements are taken. Not only does dentil molding create a beautiful, classic look, but it can also increase the value of the home, making it a wise investment for any homeowner. With just a few tools and materials, and a bit of time and effort, you can create a stunning look for your home that will last for years to come.

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