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Parts Of A Door: Names & Diagrams

Written on February 13, 2025
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Key Takeaways

  • The door frame consists of the jamb, head jamb, and sill to provide structural support.
  • Key door hardware components are hinges, locks, and handles.
  • Common materials for doors include wood, fiberglass, aluminum, and steel.
  • Features like reinforced hinges and smart locks can significantly improve security.
  • At Panda Windows & Doors, we provide a wide range of doors including sliding, pivot, folding, and hinged.

Parts Of A Door

anatomy

A door can have a lot of parts but here are the fundamental ones.

1. Door Frame

The door frame is the backbone - it holds everything together and connects the door to the walls. It’s made up of:

  • Head (Door Head): The top horizontal part.
  • Jambs: The vertical sides where the door hangs and the hinges attach.
  • Sill: The flat bottom part that sits against the floor, giving the door stability.

2. Door Panel

The door panel (or door) is the part that swings open and closed. It can be a solid slab or have decorative elements like glass inserts.

3. Stiles and Rails

More than looks, they give the door its structure and design:

  • Stiles: The vertical pieces on either side of the door panel.
  • Rails: Horizontal connectors at the top, middle, and bottom of the door.

4. Bore Hole

The bore hole is the pre-drilled spot in the door panel where you’ll install the doorknob or lockset.

5. Door Hardware

The hardware is what makes the door functional:

  1. Hinges: Metal fittings that let the door swing. Options include concealed, pivot, and barrel hinges.
  2. Lockset: All the locking and securing components, such as door knobs/handles, strike plates (metal piece on the jamb that snags on the latch or deadlock), and mortise plates (flat plate on the door for the lock mechanism).

6. Threshold

The threshold is a protective edge at the bottom of the door, which is usually ramped outward to prevent the incoming of water or wind.

7. Casing

The casing is the trim around the door. It conceals the space between the frame and the wall.

Read More: French Door vs Swing Door: Which Is Better?

8. Additional Components

  • Mullion: A vertical divider for double doors.
  • Stop Moulding: A strip that prevents the door from swinging too far inward.
  • Latch: The mechanism that keeps the door closed, operated by a knob or handle.

Founded in 1991, Panda Windows & Doors specializes in state-of-the-art custom glass wall systems for both residential and commercial spaces through Panda Windows & Doors. Operating from our manufacturing facility in Las Vegas, Nevada, we have been at the forefront of innovation for over 30 years. Our extensive product lineup includes over 80 high-end offerings, such as pivot doors, French doors, folding doors, lift & slides, multi-slides, horizontal sliding walls, and operable windows. These systems are available in materials like aluminum, steel, stainless steel, bronze, solid wood, and aluminum-wood clad.
We are renowned for our award-winning designs, engineering solutions, and fast lead times, delivering in just 6-10 weeks to customers throughout the U.S. and Caribbean. Trusted by leading architectural firms and glaziers nationwide, we stand as the premier manufacturer of custom luxury windows and doors in the United States.
Explore Custom Solutions from Panda Windows & Doors Today

Security Add-Ons For A Door

1. High-Security Locks

  • Smart Locks: Want a high-tech solution? A smart lock combines traditional security with features like keyless entry, fingerprint scanning, and even video surveillance. Plus, you can control many smart locks remotely through your smartphone.

2. Door Reinforcement

  • Security Bars and Jammers: These heavy-duty devices help stop forced entry. Adjustable and easy to install, they’re perfect for most door types.
  • Reinforced Strike Plates: Upgrading to a stronger strike plate can make it much harder for someone to kick in your door.

3. Door Chains and Bolts

  • Chain Locks: These let you crack the door open while keeping it secured.
  • Security Bolts: Adding bolts at the top and bottom of your door can make it much tougher to force open. These are especially useful for sliding doors.

4. Door Guards and Sash Blockers

  • Door Guards: These handy devices prevent your door from swinging open, even if someone manages to tamper with the lock. Use them alongside other locks for extra security.
  • Sash Blockers: Got a uPVC door? Sash blockers are a budget-friendly way to stop burglars from opening it if the locking mechanism is compromised.

5. Surveillance and Alarms

Adding a surveillance camera near your entry points can do wonders to deter intruders. And if someone does try to break in, you’ll have evidence ready. Pair it with a door alarm that triggers when the door is opened to alert you instantly.

6. Letterbox Restrictors

If your door has a letterbox, a restrictor can stop anyone from reaching inside to tamper with your locks.

Read More: Parts of a Window: Names & Diagrams

Why Choose Panda Windows & Doors

door

We specialize in manufacturing elegant doors that will serve you for years.

When you choose us, you’re investing in style, innovation, and sustainability. Let us show you why partnering with us is the perfect choice for your custom window and door needs:

1. Focus on Custom Luxury

Your space is one of a kind, and your windows and doors should reflect that! At Panda Windows & Doors, we’re all about crafting luxury designs customized specifically for your home.

2. Innovation at Its Best

Complex project? No problem. Our in-house engineering team uses cutting-edge modeling software and refines every design to meet the highest performance standards. When you work with us, you’re getting innovative, one-of-a-kind solutions backed by serious expertise.

3. Sustainable and Eco-Friendly

Caring for the planet is as important to us as creating beautiful spaces. That’s why we use highly recyclable materials like aluminum, steel, wood, and architectural bronze. Plus, our aluminum extrusions are made with up to 75% recycled materials, and we recycle 100% of our aluminum scraps.

4. Proven Performance

Our products are built to perform. Nearly all of them are independently certified by trusted organizations like NFRC and AAMA.

5. Design Freedom

From sliding and folding doors to pivot and stacking systems, we have a design for everyone. Customize your project with a variety of handle options, finish types, and glass styles - including low-E and impact-resistant glass.

Reach out to us to learn more about our products and get a free quote.

Frequently Asked Questions (FAQs)

How can I reinforce my door for extra security?

You can install a deadbolt lock, use longer screws in the door hinges to prevent forced entry, add a security bar or door brace to reinforce the door against kicking, and upgrade to a smart lock for remote monitoring and control.

How do smart door technologies work?

Smart home technologies let you manage your home's entry points from anywhere in the world. Here are some of its common features:

  • Geofencing technology allows doors to lock or unlock automatically based on your location.
  • Activity logs provide information on who enters and exits your home.
  • Integration with other smart home devices.

What are the benefits of choosing custom door designs?

With a custom door, you can choose the material, finish, glass type, and hardware to perfectly match your home's style.

What types of doors do you provide?

We have a wide range of custom luxury doors, including sliding, folding, swing, and pivot doors. Our products are made from materials such as aluminum, steel, stainless steel, architectural bronze, and wood.