July 24, 2024

Why Trim an Interior Window?

Trimming an interior window not only enhances the aesthetic appeal of your home but also adds value to your property. Whether you have recently moved into a new house or want to give your existing home a fresh look, DIY window trimming is a cost-effective and rewarding project. With just a few tools and some creativity, you can transform a plain window into a stunning focal point that complements your interior decor.

Gather the Tools and Materials

Before you begin, gather the necessary tools and materials. You will need a measuring tape, miter saw, nail gun, wood putty, sandpaper, primer, paint, and the trim of your choice. Measure the dimensions of the window and select the trim style that suits your taste and matches the existing interior design of your home.

Prepare the Window Frame

Start by cleaning the window frame to remove any dust or debris. If there are any existing nails or screws, remove them using pliers or a screwdriver. Fill any holes or gaps with wood putty and allow it to dry. Once dry, sand the surface using sandpaper to create a smooth and even base for the trim.

Measure and Cut the Trim

Take accurate measurements of the window frame and mark the trim accordingly. Use a miter saw to cut the trim at a 45-degree angle for clean and professional-looking corners. Make sure to measure twice and cut once to avoid any wastage of materials. Double-check the dimensions before making the final cuts.

Install the Trim

Apply a thin layer of primer to the back of the trim pieces to ensure better adhesion. Position the trim along the edges of the window frame and secure it in place using a nail gun. Be careful not to overdrive the nails, as this may damage the trim. Use a nail set to sink the nails slightly below the surface of the trim.

Fill and Sand the Nail Holes

Once the trim is securely installed, fill the nail holes with wood putty using a putty knife. Allow the putty to dry completely and then sand the surface until it is smooth and seamless. This step is crucial to achieve a professional finish and ensure that the nail holes are invisible.

Prime and Paint the Trim

Apply a coat of primer to the entire surface of the trim, including the front and sides. This will help the paint adhere better and provide a long-lasting finish. After the primer has dried, apply two coats of paint in your desired color. Make sure to paint in even strokes and allow each coat to dry before applying the next.

Final Touches and Cleanup

Inspect the trim for any imperfections or rough edges. Use sandpaper to smooth out any uneven surfaces or paint drips. Clean up the workspace by removing any debris or leftover materials. Once the trim is completely dry, remove any painter’s tape or protective covering from the window glass.

Enjoy the Results

Step back and admire your newly trimmed interior window. The added elegance and charm will elevate the overall look of the room and leave a lasting impression on guests. Take pride in your DIY accomplishment and enjoy the transformation you have made to your home.


Trimming an interior window is a DIY project that allows you to showcase your creativity and enhance the beauty of your home. With the right tools, materials, and techniques, you can achieve professional-looking results without breaking the bank. So why wait? Grab your tools and get started on this rewarding home improvement project today!