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Masonite Defendr™ Wooden Security Doors

Starting At $999
Fast Nationwide Delivery

Everyday, practical security when and where you need it. The Masonite® Defendr™ Door System is designed with the end in mind, with features all tailored to keeping people safe.

Forced Entry Resistant Door Solutions
Up to 20 Minute Fire Rating Available
Complete Door, Frame, and Hardware Packages
Stock Items Ship in 3-5 Business Days!
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CDF Doors Is Your #1 Online Door Supplier

Everyday Protection in a Practical, Affordable, One-Time Investment.

Every element of the Masonite® Defendr™ Door System - including its metal frame, attack-resistant glass, ANSI/BHMA Grade 1 hardware, solid-core wood door, and metal vision kit - integrates to offer unparalleled security for new construction and retrofit upgrades.

Although Masonite® Defendr™ Doors can fit into existing frames, optimal safety is achieved when the complete system is installed.

Shop Attack Resistant Security Wood Doors

Masonite Defendr Doors are available with a particle core. Each door is available with glass and a 20 minute fire rating.

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Hardware Defendr

Commercial Defendr Wood Door

Starting at $999
Available Hardware:
Leverset, Mortise, Exit Device, Closer
Available Lite Kits:
All doors come with a 4x25" Lite Kit
defendr finishes

Pre-Finished Commercial Defendr Wood Door

Starting at $999
Available Louver Stains:
Unfinished, Clear Pre-finished, Mahogany, Traditional Cherry, Golden Hickory, Dark Walnut, Dark Oak, and Autumn Oak
Defendr fire

Commercial Fire Rated 
Defendr Wood Doors

Starting at $999
Available Fire Rating:
20 minute

Why a Masonite Defendr Door Is a Good Choice

Forced Entry Resistant Interior Doors

Amid growing safety concerns in schools, Masonite has developed the Defendr™ Door System in collaboration with security experts to enhance protection against unauthorized entry. While prioritizing security, the system also maintains a welcoming school atmosphere by using tactical glass for natural light and sustainable materials for aesthetic appeal. The doors are not only cost-effective but also meet safety codes with fire-rated options and have sound-absorbing features for quieter classrooms.

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Improving Learning Outcomes

A school setting should be inviting, not fortress-like, and modern architects are achieving this balance. They're designing spaces where students not only feel secure but also flourish, thanks to the inclusion of natural light, sustainable materials, and inviting colors and textures. Masonite® Defendr™ Doors can seamlessly fit into these thoughtful designs, offering a range of customizable options to align with the desired aesthetic and design goals. In addition to this, Defendr Doors offer a complete system, built to protect:

Door Frame: 14- or 16-gauge hollow metal frame.
Metal Vision Frame: 18-gauge steel into door.
Glass & Glazing: Armoured One’s security glass.
Hardware Options: ANSI/BHMA Grade 1 Hardware.
Solid Core Wood Door: Constructed with an Extra Heavy-Duty Particleboard or Structural Composite Lumber Core.

Frequently Asked Questions About Masonite Interior Doors

Want to know more about Masonite interior doors?
We've addressed some of the more common questions below, but if you have other questions, we'd be happy to hear from you. 

Yes, we can get you a Masonite interior door with the fire rating of your choice:
  • 20 minutes

Fire-rated doors are designed to resist fire and prevent it from spreading through a building. These doors are typically used in commercial and industrial facilities, as well as in some residential settings where fire safety is a concern. A Masonite interior door's fire rating is determined through rigorous testing in a laboratory, during which the door is exposed to high levels of heat and flames. The door's ability to resist fire and prevent it from spreading is then evaluated, and the door is assigned a fire rating based on its performance.

Masonite interior doors are designed with energy efficiency in mind. They provide superior insulation and reduce energy costs. The materials used in Masonite doors – including fiberglass and steel – are highly insulating and can save you money on utility bills by preventing heat loss and gain.
Yes, if you need to buy Masonite interior doors that are taller or wider than standard-sized doors, we can supply them to you. Give us a call, and we'll be happy to get your order started.

CDF Has Masonite Interior Doors That Will Serve You Well

Masonite interior doors offer a range of options that can enhance the curb appeal, security and energy efficiency of your home or building. As a leading supplier of Masonite doors, CDF Distributors is committed to helping contractors, building managers and homeowners select the right door for their needs. CDF ensures your order is delivered quickly – and with Masonite interior doors, installation is easy, so your door will be up in no time. Buy Masonite interior doors from CDF today!

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All Industry Standard Sizes

All commercial doors come at a thickness of 1-3/4”. We offer the industry’s leading standard widths and heights for your openings. We provide cut down and restyling for custom sized doors to meet any custom opening. Be sure to review our width and height sizing chart before building your quote. If you have any further questions please contact us.

Specifications

Door Thickness

1-3/4" Standard

Core

Particle Board

Sizes

Standard Width: 3'0" 
Standard Heights: 6'8", 7'0"

Undercut

3/4" Standard

Finish

Unfinished and stained finishes available

Standard Preps

161 (cylindrical lock), 86 Edge (mortise lock), RPD (blank edge)

Fire-Rating

20 minute

ANSI Standards

Meets or exceeds requirements of ANSI A208.1 and CS236-66

Optional Preps

Exit Device Trim, Deadbolts, Lite and Louver Cutouts, Continuous Hinge Application (Undersized Width)

Stains Available

Unfinished, Clear Pre-finished, Mahogany, Traditional Cherry, Golden Hickory, Dark Walnut, Dark Oak, and Autumn Oak

Handing

Left and Right

Mfg. Hinge/Lock Locations

Steelcraft, Mesker, Ceco, Curries, Republic, Baron, DKS, Pioneer, Deansteel, Custom Locations
Most Popular Door Sizes
Call Size
Nominal Width
Nominal Height
3068
3’0″ (36 inch)
6’8″ (80 inch)
3070
3’0″ (36 inch)
7’0″ (84 inch)
Door Sizes |6’8″ Height 
Call Size
Nominal Width
Nominal Height
2068
2’0″ (24 inch)
6’8″ (80 inch)
2468
2’4″ (28 inch)
6’8″ (80 inch)
2668
2’6″ (30 inch)
6’8″ (80 inch)
2868
2’8″ (32 inch)
6’8″ (80 inch)
21068
2’10” (34 inch)
6’8″ (80 inch)
3468
3’4″ (40 inch)
6’8″ (80 inch)
3668
3’6″ (42 inch)
6’8″ (80 inch)
3868
3’8″ (44 inch)
6’8″ (80 inch)
4068
4’0″ (48 inch)
6’8″ (80 inch)
Door Sizes |7’0″ Height 
Call Size
Nominal Width
Nominal Height
2070
2’0″ (24 inch)
7’0″ (84 inch)
2470 
2’4″ (28 inch)
7’0″ (84 inch)
2670
2’6″ (30 inch)
7’0″ (84 inch)
2870
2’8″ (32 inch)
7’0″ (84 inch)
21070
2’10” (34 inch)
7’0″ (84 inch)
3470
3’4″ (40 inch)
7’0″ (84 inch)
3670
3’6″ (42 inch)
7’0″ (84 inch)
3870
3’8″ (44 inch)
7’0″ (84 inch)
4070
4’0″ (48 inch)
7’0″ (84 inch)
Door Sizes |8’0″ Height 
Call Size
Nominal Width
Nominal Height
2080
2’0″ (24 inch)
8’0″ (96 inch)
2480 
2’4″ (28 inch)
8’0″ (96 inch)
2680
2’6″ (30 inch)
8’0″ (96 inch)
2880
2’8″ (32 inch)
8’0″ (96 inch)
21080
2’10” (34 inch)
8’0″ (96 inch)
3480
3’4″ (40 inch)
8’0″ (96 inch)
3680
3’6″ (42 inch)
8’0″ (96 inch)
3880
3’8″ (44 inch)
8’0″ (96 inch)
4080
4’0″ (48 inch)
8’0″ (96 inch)
Actual width is 1/4" under nominal door size, to allow for 1/8" clearance on hinge and strike sides.
Actual height is 7/8" under nominal door size. Standard undercut is 3/4" + 1/8" clearance at top = 7/8"
All doors = 1-3/4″ thickness
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