Feature Story

"Trim Built-In Bookshelf: Easy DIY Ideas & Tips"

Embracing the charm of built-in bookshelves in your home design not only adds a touch of elegance but also maximizes your space's functionality. However, over time, these architectural features can become overlooked, gathering dust and clutter. Today, we're going to focus on a simple yet transformative task: trimming around built-in bookshelves. This process will not only enhance the aesthetic appeal of your space but also create a cohesive, polished look that ties your room together.

Adding Trim To Cabinets & Bookshelves
Adding Trim To Cabinets & Bookshelves

Understanding the Importance of Trimming Built-In Bookshelves

a person is painting the inside of a white bookcase with paint rollers on it
a person is painting the inside of a white bookcase with paint rollers on it

Trimming around built-in bookshelves serves multiple purposes. Firstly, it creates a clean, finished look, making your shelves appear as a seamless part of the room's design. Secondly, it prevents dust and debris from accumulating in hard-to-reach areas. Lastly, it provides a smooth surface for painting or wallpapering, allowing you to easily update your room's decor.

Tools and Materials Needed

Genius DIY Bookcase Ideas for Small Spaces and Big Style
Genius DIY Bookcase Ideas for Small Spaces and Big Style
  • Circular saw or jigsaw
  • Tape measure
  • Pencil
  • Sandpaper (120-grit)
  • Paint or wallpaper (optional)
  • Paintbrush or roller (if painting)
  • Wallpaper paste and brush (if wallpapering)

Step-by-Step Guide to Trimming Around Built-In Bookshelves

Island Cottage - St. Pierre Construction
Island Cottage - St. Pierre Construction

1. Measure and Mark

Begin by measuring the width and height of your bookshelf. Mark these dimensions on the wall using a pencil, ensuring the lines are level and plumb.

2. Cut the Trim

Shop My Library Trim - Palmetto Highway
Shop My Library Trim - Palmetto Highway

Using your circular saw or jigsaw, cut pieces of trim to match your marked dimensions. For a clean, professional look, opt for trim with a simple, elegant profile.

3. Sand the Edges

Before installation, sand the edges of your trim pieces using 120-grit sandpaper. This step ensures a smooth surface for painting or wallpapering and prevents any rough edges from snagging on clothing or causing injury.

12 Inch Shelves, Built In Bookcase With Arched Top, Built In Designs, Tall Wall Paneling Ideas, Rounded Bookshelves, Cabinet Bookcase Built Ins, Shelves Built Into Wall, Built In Wall Cabinet, In Wall Shelving
12 Inch Shelves, Built In Bookcase With Arched Top, Built In Designs, Tall Wall Paneling Ideas, Rounded Bookshelves, Cabinet Bookcase Built Ins, Shelves Built Into Wall, Built In Wall Cabinet, In Wall Shelving

4. Install the Trim

Apply a thin bead of construction adhesive along the back of each trim piece. Align the trim with your marked lines and press it firmly against the wall. Use a level to ensure the trim is straight, then secure it in place with finishing nails or brad nails. Fill any nail holes with spackling compound and sand smooth once dry.

19 Stunning Ikea Billy Library Wall Hacks For Home
19 Stunning Ikea Billy Library Wall Hacks For Home
an empty room with many bookshelves and windows in the back ground, there are lights hanging from the ceiling
an empty room with many bookshelves and windows in the back ground, there are lights hanging from the ceiling
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32 Brilliant Built-in Bookshelf Ideas
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Adding Moulding to Ikea Billy Bookcase
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These IKEA Billy Bookshelf Makeovers For Creating The Perfect Wall
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an empty room with built in bookshelves and a chandelier
an empty room with built in bookshelves and a chandelier
a living room filled with lots of bookshelves covered in white bookcases
a living room filled with lots of bookshelves covered in white bookcases
19 Jaw-Dropping Built-In Shelves That’ll Steal Your Living Room Show: Fireplace Edition 🔥 - Home by Maria Faller
19 Jaw-Dropping Built-In Shelves That’ll Steal Your Living Room Show: Fireplace Edition 🔥 - Home by Maria Faller
380K views · 7.5K reactions | DIY Living Room Built Ins with fireplace Part 3 | By Designing | Welcome to part three my living room built ins. If you include the flooring and the fireplace build, this project has taken me just over a year to complete and I cannot wait for it to be done. Last time we left off, I had installed my cabinets and built four separate shelving units out of oak boards and I decided to stain my shelves to try to keep some natural wood on this project. I got the best looking thin plywood that I could find for the back of these shelves. I didn't want super thick plywood because then my shelves would stick out too far. I started attaching all my backs and realized very quickly that I was just building a playground attached. I also primed and painted all of these back pieces before attaching them so I wouldn't have to tape off my stained shelves to paint them later. After going through far more paint samples than I want to admit or that I ever want to see again, I finally decided on a color and went ahead and started priming and painting all of my cabinets. I usually like to prime by hand because primer can really clog up your paint sprayer and let's be honest, I just don't have my life together enough to clean my sprayer fast enough for it to not get clogged. So, I used a brush for the edges and then a foam roller for all the flat pieces to prime the cab and then I use my paint sprayer to spray the actual paint on the fronts and the backs. I attached all my shelves into the studs and the walls and now it was time to add some trim to make up for all of those uneven walls and maybe some mistakes. The one side of these shelves is exposed into the dining room so I decided to add a little bit of his shaker style trim around that side to give it a little bit more character instead of just a plain wall. Since no wall is ever straight, I had to use a level on every single one of these trim pieces to make sure that my trim was actually straight and not lining up against the wall and we'll fix that with the caulk later. Filling nail holes and caulking really isn't that bad but I was sick at the end of this project so this is probably my least favorite part of this entire process. This part and the rest of the painting really only took a couple days but since I was sick, it felt like an eternity. Now, before you come at me for painting this wood, I had to use a different type of wood on the trim pieces than I did for the shelves so if I stained them, they wouldn't match. I added battery-powered picture frame lights to the top of these units and then some gold handles to finish it all off. I am so happy to almost be done with this living room project. And I love how it turned out but I'm so ready to put my furniture back.
380K views · 7.5K reactions | DIY Living Room Built Ins with fireplace Part 3 | By Designing | Welcome to part three my living room built ins. If you include the flooring and the fireplace build, this project has taken me just over a year to complete and I cannot wait for it to be done. Last time we left off, I had installed my cabinets and built four separate shelving units out of oak boards and I decided to stain my shelves to try to keep some natural wood on this project. I got the best looking thin plywood that I could find for the back of these shelves. I didn't want super thick plywood because then my shelves would stick out too far. I started attaching all my backs and realized very quickly that I was just building a playground attached. I also primed and painted all of these back pieces before attaching them so I wouldn't have to tape off my stained shelves to paint them later. After going through far more paint samples than I want to admit or that I ever want to see again, I finally decided on a color and went ahead and started priming and painting all of my cabinets. I usually like to prime by hand because primer can really clog up your paint sprayer and let's be honest, I just don't have my life together enough to clean my sprayer fast enough for it to not get clogged. So, I used a brush for the edges and then a foam roller for all the flat pieces to prime the cab and then I use my paint sprayer to spray the actual paint on the fronts and the backs. I attached all my shelves into the studs and the walls and now it was time to add some trim to make up for all of those uneven walls and maybe some mistakes. The one side of these shelves is exposed into the dining room so I decided to add a little bit of his shaker style trim around that side to give it a little bit more character instead of just a plain wall. Since no wall is ever straight, I had to use a level on every single one of these trim pieces to make sure that my trim was actually straight and not lining up against the wall and we'll fix that with the caulk later. Filling nail holes and caulking really isn't that bad but I was sick at the end of this project so this is probably my least favorite part of this entire process. This part and the rest of the painting really only took a couple days but since I was sick, it felt like an eternity. Now, before you come at me for painting this wood, I had to use a different type of wood on the trim pieces than I did for the shelves so if I stained them, they wouldn't match. I added battery-powered picture frame lights to the top of these units and then some gold handles to finish it all off. I am so happy to almost be done with this living room project. And I love how it turned out but I'm so ready to put my furniture back.
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How to Make a Custom Built-In Bookcase Around the Fireplace
a dining room with green walls and built in bookshelves
a dining room with green walls and built in bookshelves
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DIY Office Built-Ins: IKEA Billy Bookcase Hack
a room filled with lots of white furniture
a room filled with lots of white furniture
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How to Build Built In Bookshelves on a Budget :
The secret sauce to this room is the trim! I zhuzhed up all these built-ins with lots of millwork
The secret sauce to this room is the trim! I zhuzhed up all these built-ins with lots of millwork
25 Elegant Wall Molding Ideas to Elevate Your Living Room - Decor Sly | Decor Designs Ideas
25 Elegant Wall Molding Ideas to Elevate Your Living Room - Decor Sly | Decor Designs Ideas
a living room with white furniture and book shelves on either side of the couch,
a living room with white furniture and book shelves on either side of the couch,

Finishing Touches: Painting or Wallpapering

Once your trim is installed, you can paint or wallpaper the area to create a cohesive look. If painting, use a paintbrush or roller to apply even coats of paint. If wallpapering, apply wallpaper paste to the wall using a wallpaper brush, then carefully position the wallpaper, smoothing out any bubbles or wrinkles.

Maintenance and Care

To keep your trimmed bookshelves looking their best, regularly dust the area with a soft cloth or microfiber duster. For a deeper clean, use a mild soap and water solution to wipe down the trim, then dry thoroughly. Avoid using harsh chemicals or abrasive materials, as these can damage the finish.

Trimming around built-in bookshelves is a simple, transformative task that can significantly enhance the look and feel of your space. By following these steps and using the right tools and materials, you can create a polished, cohesive look that adds value and charm to your home. So why wait? Get started on your trimming project today and watch as your built-in bookshelves become the stunning focal point they were always meant to be.