Interior Wood Window Trim Ideas – Moldings are not something you really need on a window, but they can certainly be a nice decorative touch that adds dimension to your room.

In this post, I’ll share some great inspiration for interior window coverings and give you a quick overview of what the word ‘decorative’ means.

Interior Wood Window Trim Ideas

Molding, Trim and Casing – Builders and remodelers often use these terms interchangeably, so if you’re researching or looking for inspiration, don’t get confused by all the language.

8+ Creative Ideas For Choosing Your Exterior Window Trim Options • 333+ Inspiring Lifestyle Ideas

Design – material used to create a transition between different surfaces, usually decorative elements; often written as “moulding”

Trim – To trim really means to make something neat, usually by trimming, it also means to decorate, usually used as a synonym for shaping.

Casing – Casing is a type of molding used to trim windows and doors; This term distinguishes it from other design styles used to trim walls, floors, and ceilings

There are many options when it comes to window and door surrounds. You can choose a very traditional white one, if your home has a more rustic feel, you can choose something more rustic or bold with wide or colorful borders.

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Another note before you get lost in inspiration: window manufacturers and window sellers often consider window casings an optional feature, so when buying new or replacement windows, ask if the trim/casing is included with the purchase.

Window manufacturers usually make the trim as well, and it’s a good choice if you want to trim to match the material and color or stain of the window. Homeowners can do the job themselves, but it’s best to leave it to a professional (your window technician has a lot of experience in installing and building siding).

Classic style is described as timeless and simple. If you want to keep your window style minimalistic and neutral, then this is the style for you.

Most people choose classic window coverings, because windows are only replaced every 20 years. That’s why many people like to keep it simple.

How To Paint Interior Oak Trim

Rustic style has many natural tones and textures. Typical rustic pieces usually include natural elements such as cowhide, natural light and of course lots of wood.

Another characteristic of the rustic style is the acceptance of imperfections, because many things in the rustic style are more rough, shapes and natural edges.

Bold design options are a bit rarer as they tend to be a little harder to pull off. However, a bold style, if done right, can help make your home look better and belong.

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How To Install Craftsman Style Interior Window Trim

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Installing new window and door trim is one of my favorite ways to upgrade the interior of my home – or in this case, the interior of my workshop.

How To Choose Interior Window Trim

I’m installing this DIY window trim on new build windows and doors in my new workshop – so no trim involved here. However, I have done this many times on doors and windows with existing trim.

If your window already has a border, remove it first. Using a pry bar and a hammer, you can carefully remove the window trim to get it down to the rough 2×4 window frame you see here.

I’ve provided a YouTube video here showing you how to install this DIY custom window trim on your own windows, plus I have a step-by-step tutorial written below:

Diy Window Trim

Common wood frame houses and buildings have exterior walls of 2×4 or 2×6. In my case the walls are 2×4 and I used 1×6 for my window sill/shelve and used 1×4 for interior window trim.

However, if you have a 2×6 wall, you will need more space because your wall is thicker. I recommend using 1×8 for the edge plates and 1x6s for the main frame. (* These are listed in the ingredients list below)

I have listed the basic board sizes I used in this project below, but the number/length of your boards should vary depending on the size of the window and how many are cut.

I recommend you read the tutorial, then measure the window and calculate the rough size for each piece in the tutorial, add it up and figure out how much wood/material you will need.

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I added the first windowsill, so I took my 1 × 6 for it. I measured the inside opening of the rough window frame – so the window would sit between the 2x4s. Find this WIDTH (measure from left to right).

Since I added 1x4s (that are 3 ½” wide) to each side of the window on the outside, I needed to add 7″ to the measurement of the opening. However, I usually also have about a 2″ overhang on each side.

So the total length of this 1×6 window sill should be = interior opening + 7″ + about 4″ for overhang on each side.

I trim 1 × 6 to that length, then marked the center of the board. (Ex. If you cut the board to 60 inches, mark it at 30 inches.) I measured the opening divided by 2 and marked the distance on the board on each side of the center line.

Modern Farmhouse Window Trim || Damsel With A Drill

I went back to the window and measured from the front of the window to the front of the drywall in several places and took the average.

In theory, it should be the same throughout the length, but in reality it is very rare. Using the average looks great.

Wooden Window Sill

You may need to trim and adjust it a bit, but once it fits, it’s time to nail it in place.

During this project, I relied on Ryobi AirStrike Cordless Hammers. I gave up on air nailers a few years ago because I got tired of pulling strings and heavy compressors. I picked up the AirStrike and never put it down.

I have been using an 18 gauge Ryobi AirStrike for over 4 years and recently added a 16 gauge Ryobi AirStrike to my shop.

I really like to use 16 gauge for doors, windows and larger, thicker trim because it’s a bigger nail so it holds a little stronger.

Easy Diy Farmhouse Interior Window Trim

But I like to keep 18 gauge on hand for smaller, more delicate pieces like crowns and semi-round moldings I add later.

A nail gun is actually one of our five recommended tools for woodworking beginners! See my full list here.

I took this size 16 AirStrike to secure this window sill in place along with the rest of the main window trim.

After the window sill is in place, I proceed to add trim around the rest of the interior of this window.

How To Install Window Trim

I cut a 1×4 to the length of the opening at the top. Now, as I said before, my walls are 2×4 studs. If you are working with a 2×6 wall, you will need a larger board, such as a 1×6, for this.

After cutting it to length, I measured the distance at the top between the front of the window and the front of the drywall in several places and took the average.

I tore this board to the width of the table saw and then nailed it in place. You want all the interior panels to touch the window frame and line up