A window is not merely a home feature, it is a window of opportunity that allows you to look upon the soul of the home.

Including a window, trim elevates the aesthetic while offering a protective layer to the head and jambs of a window. Especially in the case of the exterior window trim, these moldings are designed to offer protection and are best suited when they are waterproof.

While covering any gaps that may be present, window trim also helps set a unique and distinctive style. This is especially true for interior window trims where decoration and insulation are the primary purposes.

For both, the right installation is key. If you have been wondering how to install window trim, let us assure you that is a relatively straightforward process that can be achieved with a base level of understanding.

Some of the tools that you need to have at your disposal for this process are listed below:

    • Air hose
    • Air compressor
    • Caulk gun
    • Brad nail gun
    • Safety glasses
    • Utility knife
    • Miter saw
    • Hammer

Here are some simple steps following which you can install window trim:


Step #1: Mark Out the Length

When you decide to install window trim, you must remember to start the process from the top. On one end of the trim, create a 45-degree angle. You have to hold it so that the angle’s short end overhangs the hallway onto the jamb. After this, you will be required to mark the other end with the interiors of the jamb.

Step 1 Mark Out The Length How To Install Window Trim
credits – familyhandyman.com

Step #2: Space It Out

Position the top piece and clasp the trim at least 3 inches away from the jamb found at both the corners and alongside the window casing’s base. After this, you have to get the trim nailed to the jamb with 1-inch long brads. There should be a gap of inches between each of the brads. The thicker portion of the trim should be nailed to the framing with 2-inch long brads.

Step 2 Space It Out Installing Pvc Window Trim
credits- familyhandyman.com

Step #3: Inspect The Fit

On one corner of the trim board, cut a 45-degree miter and then, adjust the miter in a way that demonstrates the perfect fit. Then, score a line 3-inches across the cut length past the jamb’s bottom. First, you have to get the nail trimmed to the jab and then, nail it to the window casing framing.

Step 3 Inspect The Fit How To Install Window Trim
credits- familyhandyman.com

Step #4: Use Glue and Pin

Get the corners fastened and then, use glue and pin, along with 1-inch brads, to join the miter from both directions. As soon as you accomplish this, remove the extra glue splattered around with the help of a damp rag. 

Step 4 Use Glue And Pin
credits- familyhandyman.com



Use the aforementioned steps to trim the other side of the window. As stated earlier, you must move from the top to the bottom.

If you have never installed window trim in the past, the process might feel a little daunting at first. Whenever you feel like giving up, it’s important to remember that you can accomplish the task of installing PVC window trim with the right guidance, right tools, and the right mindset.



Disclaimer: The views expressed in this article are based on our team’s knowledge and experience. The results from instructions provided in the blog may vary from case to case basis. We strictly advise our readers to verify all the information provided here through their sources. Echon, its employees, partners, distributors, or directors are not responsible for any consequences, good or bad, that may arise from following the instructions on this blog for an individual or a company from the USA or abroad. The information is being provided to help our readers and our community and is by no means official. We are not legally or morally liable for any damage, financial or non-financial, that may be caused by following the suggestions or information provided in our blogs.