Learn how to install baseboard, base cap, and window and door trim from a professional finish carpenter, complete with the essential tools, terminology, and materials involved in interior finish carpentry.


  • 30-day money back guarantee. Access for one year.
  • Train with a Pro

  • Spanish Subtitles Available

  • Mobile Access

  • 15 In-depth Lessons

  • Certificate of Completion

  • Practical Resources

Lesson Plan

15 Video Lessons · 53M

  • 1. Introduction

    Your instructor, Aaron Butt, is a professional framer and finish carpenter who has been working in the trades for twenty years. Learn why finish carpentry is such a unique trade, and how it’s able to transform rough construction into a beautiful, finished space.

  • 2. What Is Finish Carpentry?

    Finish carpentry is all around us, from baseboards to wall paneling to window trim to crown moulding. Aaron reviews the wide variety of profiles and stocks to choose from in finish carpentry, and emphasizes the necessity of consistency and attention to detail when working with trim.

  • 3. Trim: Basic Tools

    Finish carpenters are very particular about their tool sets, and these sets often vary greatly from carpenter to carpenter. Aaron reviews a select few of his favorite trim carpentry tools to have on hand, like a rubber mallet, trimmer’s flat bar, spring clamp, and more.

  • 4. Trim: Process Overview

    Finish carpentry is about taking construction work—regardless of the state—and making it look as good as possible. Aaron reviews a general finish carpentry workflow, which involves checking the leveling, laying out the reveals, rough cutting the material, preassembling the cut pieces and installing them, and scribing.

  • 5. Interior Door Trim: Marking in Place

    Aaron shows you how to lay out your reveals—which means marking the areas for the trim on the edge of the door casing—with a combination square and pencil. Then, learn how to mark up the three casing pieces and safely make miter cuts so they’re ready for preassembly.

  • 6. Interior Door Trim: Preassembly

    Preassembly is a process by which you cut and assemble all of your pieces at once, before installation. Once the pieces have been cut, learn how to join three door casings using wood glue, a rubber mallet, spring clamps, and an eighteen gauge brad gun.

  • 7. Interior Door Trim: Installation

    Aaron demonstrates a basic door trim installation, working the eighteen gauge brad gun down the casings so they are firmly attached to the door jam. Learn how to avoid pulling the joints apart with the nails using pieces of shim and an angled finish nailer.

  • 8. Terminology: Miter and Bevel Cuts

    Miter and bevel cuts are some of the most common cuts used in finish carpentry. Learn about making miter cuts in casing and baseboard, and how to make a bevel cut.

  • 9. Baseboard Installation: Wall Out of Plumb

    If you inherit walls that aren’t entirely straight, you’ll end up with a gap where they meet the baseboard. Learn how to correct this mistake using a speed square and saw for a beautiful, finished space.

  • 10. Baseboard Installation: Floor Out of Level

    To install baseboards along a floor that isn’t level, you’ll need to scribe your baseboard to the floor. Learn how to adjust the baseboard piece to the floor’s slope.

  • 11. Baseboard Installation: Outside Corner Angles

    Sometimes wall corners don’t come together at exactly ninety degrees. Learn how to use an angle finder to measure your wall corners, then adjust your baseboard measurements to fit the wall corner–even if it isn’t square.

  • 12. Base Cap: Installation

    A base cap is a transitional piece between the baseboard and the wall, used for safety and aesthetics. Aaron demonstrates a simple base cap installation using miter clamps and a brad gun.

  • 13. Interior Window Trim: Introduction

    Stool caps and aprons line the bottoms of windows to create a finished look. Learn how to determine measurements and cut for an apron, stool cap, and a return stock—a small piece of trim that fits to another piece of trim to create a ninety degree angle.

  • 14. Interior Window Trim: Installation

    Aaron takes you through a full window trim installation, starting with the stool cap, moving to the window casings, then finishing with the apron and stock returns. Finally, learn how to measure, cut, and attach an apron stock, creating a ninety degree angle on the aprons and completing the window trim.

  • 15. Conclusion

    Each person finds their own sweet spot within carpentry. For Aaron, it’s interior finish carpentry. Learn how this trade has provided him with a great living, exciting work environment, and a satisfying way to work with his hands to make beautiful spaces come to life.

Who it's for: This course is designed for construction professionals or entry-level carpenters looking to specialize in this area of the trades and gain new skills to perform quality interior trim work for any job.

Key Topics

  • Finish carpentry tools

  • Miter & bevel cuts

  • Installing baseboards

  • Installing door & window trim

  • Installing base caps

  • Preassembly

4.8 Out of
5 stars

Overall rating of 6 students

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30-day money back guarantee. Access for one year.

Common Questions

  • What is MT Copeland?

    MT Copeland helps you further your career in the building industry with expert-led online education that will make you a better, smarter tradesperson.

    Our training courses give you a foundation in construction fundamentals and trade skills with real-world applications and best practices to help you grow on the job.

  • What do courses include?

    Online courses include professionally produced videos taught by leaders in the trades and supplementary learning material such as quizzes, assessments and downloadable materials to help you acquire new skills. Watch anywhere, always at your own pace. We keep lesson videos short so they’re easy to watch after work or on your lunch break. You can finish a course in one sitting, or space it out over a week or two.

  • How does the 30-day guarantee work?

    If you’re not happy with a course, let us know within 30 days for a full refund. Our goal is to provide maximum value for your career. If we haven’t delivered on that promise, let us know.

  • Can you learn with MT Copeland outside of the u.s.?

    Yes! You can take MT Copeland courses from anywhere in the world. Our courses are online, so if you have access to the Internet, you can watch our training videos. Courses are taught in English, with English captions and Spanish subtitles available.

  • Where did the name MT Copeland come from?

    MT Copeland was named after a legendary educator who promoted the idea that training in a specific trade paired with a knowledge of general business principles opens up a whole new world of career possibilities. We believe in the same powerful combination of skills and knowledge.

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