What Is the Difference Between Moulding and Trim?

When it comes to the design of interior spaces, the addition of trim, casing or moulding can dramatically enhance the utility and appeal of a room. While occasionally these terms are used interchangeably, there are some distinct differences between them. Generally, all refer to millwork or other material that fills the space left between the wood and drywall. Some, like trim, are more often used for practical purposes, while others, like moulding, are typically for adding decoration and enhancement to a space. All are essential components in making an interior space feel complete and put together.

At the Arizona Door Store, we are a local, family-owned company committed to providing expert service and personalized selection to customers across Arizona. For doors, moulding, hardware and other materials homeowners and contractors rely on, we are a business you can trust. If you are unsure whether your next project would benefit from moulding, trim or casing, read on to see how each are best used.


Trim generally refers to any and all of the material in a home that is used to surround openings and corners. Trim is designed to fill the gap that exists between the drywall and frame, like those found around a door, window or piece of flooring, and is great for smoothing harsh lines or in areas where two types of surfaces converge.

Trim is usually considered distinct from moulding because of its practical, utilitarian purposes. Where moulding is characterized by its enhanced profile, trim often blends into the flow and look of a room. It is often fashioned from many common materials, like bare wood, fiberboard or even polyurethane, and is generally easy to install and DIY friendly.

For projects with tighter budgets or timelines, trim is a compelling choice that is more economical and adaptable than moulding.


Like trim, moulding works to cover harsh lines and border windows and doors but is often chosen over trim for its decorative and ornamental properties. Crown moulding is a great example of this, as it instantly adds a refined and elegant appeal to a space. While in the past moulding was often the domain of a wealthy and ostentatious home, today the availability of a wide variety of materials makes ornate moulding options much more affordable.

Homeowners may find that rooms lacking in visual appeal or statement pieces would benefit from the grander aesthetic moulding lends to a space.   

Using Trim and Moulding

Both trim and moulding can be used throughout a home to provide utility and embellishment. Windows, baseboards and ceilings are all common surfaces that benefit from some degree of trim, and depending on the needs of the space, can be more functional or decorative.

Crown moulding is one of the most well-known examples of interior trim and helps to streamline the walls and ceilings in a home. While the degree of ornamentation varies, at its core crown moulding can add grandeur and enhance the visual appeal of walls and ceilings. It is also typically designed to draw the eye up, and many smaller spaces with shorter ceilings see immediate benefit from the installation of crown moulding.

Baseboards are another type of trim that helps the flow of a room and eases the transition from the floor to the wall. Like crown moulding, baseboards allow a lot of creativity for homeowners, and can be as simple or extravagant as desired.

Trim and moulding allow a lot of flexibility when it comes to the design and feel of interior spaces, and whether for practical purposes or ornamentation, can make or break the look of a room.

Whichever option you decide best fits the design for your next remodel, at the Arizona Door Store we offer a robust inventory of different moulding, casing and trim, and our industry-leading designers are here to bring your ideas from the drawing board to life.

Why choose us?

At the Arizona Door Store, we offer a wide range of moulding, hardware and interior and exterior doors for clients throughout Scottsdale, Phoenix and Tucson. As a family-owned company, we understand the importance of providing expert service with unparalleled value to customers throughout Arizona.

Our team of experienced design consultants can walk you through our wide selection of products at our Scottsdale and Phoenix centers and help bring your dreams and ideas to life. As one of the fastest door pre-hanging shops in Arizona, you can be assured that our team will get a door or any other hardware to your home quickly.

Visit one of our design centers for personalized recommendations or for help with special orders from our vast network of manufacturing partners. Contact us today for your next big project and one of our consultants will get in touch with you!

7 Common Mistakes to Avoid When Installing an Interior Door

Installing new interior doors is a relatively easy way to enhance the style of any room while also improving privacy, noise control, and ease of use. While the installation process may be more straightforward than many other home improvements, planning for the project before you get started is crucial. Being aware of some of the pitfalls that homeowners encounter when installing interior doors can help ensure that your new doors will provide long-lasting style and functionality.

At Arizona Door Store, we offer an extensive selection of interior and exterior doors, as well as moulding and door hardware, designed for both contractors and homeowners undertaking a DIY installation project. We’ve compiled the following list of seven common mistakes to avoid when installing an interior door:

  1. Not having the right tools on hand. While the specific tools you’ll need may vary based on the type of door being installed, here is a list of some of the tools you’ll likely need:
    • Measuring tape, a putty knife, and a pry bar to help you get accurate measurements of the existing door
    • A utility knife and reciprocating saw for removing the old door
    • A level, wooden shims, a caulk gun and caulk for prepping the opening and setting the new door in place
    • A hammer, screws, and nails for fastening the new door frame
    • A screwdriver, spray foam, trim, and door hardware (such as the hinges and doorknob) to complete the installation
  1. Measuring incorrectly. Getting accurate measurements is crucial for ensuring proper fit and function for the new door. In addition to measuring the width, height, and thickness of the existing door, you’ll need to measure the rough opening, or the structurally framed opening in the wall where the door is placed.
  2. Trimming down the door too much. You may need to trim the door to ensure a good fit, but trimming too much could result in exposing the door’s core material. Be sure to trim the door in order to suit the frame and proceed cautiously, remembering that you can always trim more if needed.
  3. Not considering the door hardware. Consisting of the door’s hinges, locking mechanisms, and knobs or levers, the right hardware will tie together the door’s overall look and functionality. Be sure to choose hardware that will suit the style of your new interior door, as well as the style of the surrounding room. You’ll also want to consider how the door will be used—for example, bedroom or bathroom doors will require locks, while closet or office doors generally do not. Additionally, if your family includes elderly people or those with dexterity issues, it may be easier for them to use levers rather than knobs. Before you start your door installation project, take the time to carefully select the hardware and have it on hand and ready to be installed.
  4. Using the wrong screws. The door hinges serve the important role of ensuring that the door opens and closes properly, so choosing the right hinge screws is essential. If the screws are the wrong size, the hinges may be unable to support the weight of the door, which could lead to problems such as the door scraping the floor over time. Be sure to check with your door supplier to verify which size hinge screws you’ll need for the particular doors you are purchasing.
  5. Tightening the screws too tightly. Some DIY-ers make the mistake of assuming that tightening the hinge screws as much as possible will help the door close more securely and stay in place longer. In reality, however, the more you tighten the screws, the more tension you add to the material—which can lead to warping over time.
  6. Hanging the door upside down. While this step may seem like one of the easier parts of the process, hanging the door upside down is a surprisingly common mistake. To avoid it, pay careful attention to the placement of knobs and panels, and make sure that you know where everything is supposed to go before starting the installation process.

With a little advance research and planning, you should be ready for a successful DIY door installation process. If you have any questions or would like more information on our products, contact Arizona Door Store today! If you’d prefer to leave your door installation project to the professionals, check out our sister company, the Window & Door Store, which offers full-service design, modification, and installation capabilities for residential windows and doors.

What is Millwork?

If you’ve ever undertaken a significant home improvement project, you’ve likely heard of millwork. While the term is used frequently by contractors, you may have wondered, “What exactly is millwork?” Simply put, millwork is a broad term referring to any building materials—particularly those that serve a decorative rather than a structural function—that were traditionally produced in a sawmill. Common examples of millwork include:

  • Doors and doorframes
  • Window frames
  • Trim
  • Shelving and mantels
  • Moulding
  • Wall paneling

What materials is millwork made from?

Traditionally, millwork only included materials made from raw lumber, but this definition has been significantly expanded over the years. Today, millwork may encompass products made from pine and oak, as well as less common woods such as fir, poplar, hickory, and maple. Additionally, products made from aluminum, steel, fiberglass, particleboard, composite materials, and medium-density fiberboard (MDF)—which is composed of wood-mill byproducts—may be considered millwork.

What is the difference between millwork and casework?

Adding confusion to the definition of millwork is the fact that not everything produced in a sawmill qualifies. For example, flooring is usually distinguished from other types of millwork products. Another distinct category is known as casework, which refers to boxed pieces such as bookcases, drawers, or cabinets. While some homeowners seek out custom-built casework, it is more often mass produced in standard dimensions, which reduces the overall cost of the materials and facilitates an easy installation process.

How much does millwork cost?

Since millwork encompasses so many different products and materials, it is difficult to identify a single price range. For example, the cost of replacing an interior or exterior door may range from $150 to nearly $2,000; the installation of new trim may range from $700 to $1,300; and a new mantelpiece may cost anywhere from under $500 to $700. As with other home improvement projects, the final cost will depend on factors such as the type of product installed, the quality of materials used, and the expertise of the installers.

Millwork from Arizona Door Store

At Arizona Door Store, we understand that choosing the right millwork for your home can be overwhelming. As a family-owned and operated company dedicated to providing expert personalized service for both homeowners and contractors, our team is here to help guide you through our vast selection of millwork and other products, including interior and exterior doors, moulding, and hardware. Many of our doors are locally made in Arizona using high-quality materials, with a wide variety of style options ranging from sleek and modern Shaker-style doors to charming and rustic barn doors and everything in between. Contact us today to learn more about what we offer!