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When you see terms like steel building doors, commercial fire rated doors, or hurricane proof doors, you’re not just looking at product categories—you’re looking at solutions built for specific risks, codes, and environments.

That’s what defines a specialty door.

At CDF Distributors, specialty doors are designed around real-world performance, not just standard sizing or appearance. Each type exists to solve a specific problem that a typical door cannot.

What Are Specialty Doors?

Specialty doors are engineered for performance requirements beyond standard use. In commercial construction, doors are often part of a larger system tied to safety, compliance, and long-term durability. A standard door might close an opening, but a specialty door is designed to perform under pressure—literally and figuratively.

You’ll typically see specialty doors used when a project calls for:

• Preassembled metal building doors (commonly referred to as steel building doors) for exterior commercial structures

Choosing the right lock is a big part of selecting commercial door hardware. The hardware you choose affects security, durability, and how a door functions every day. Whether you are working with steel frames, aluminum storefronts, or glass assemblies, understanding how different lock types work helps ensure your doors perform as expected. For contractors and facility managers, knowing the differences also makes it easier to choose reliable commercial door hardware parts from trusted commercial door hardware suppliers.

Three of the most common options you will see in commercial applications are leversets, leversets with deadbolts, and mortise locks. Each option plays a different role and is suited to different door types and traffic conditions.

Similarities Between Common Commercial Lock Types

Leversets, leversets with deadbolts, and mortise locks all serve the same basic purpose. They allow controlled access while still meeting safety and code requirements. Each option can be paired with

When you’re ordering commercial glass double doors or exterior steel double doors, the last thing you want is a damaged shipment slowing down your project. At CDF Distributors, we understand that these doors aren’t just pieces of steel—they’re investments in safety, security, and smooth daily operations. That’s especially true for fire rated double doors, where performance matters from day one. That’s why we take extra care every step of the way, from production to shipping. 

Fast-Track Production with Care Built In 

Every door that leaves our facility goes through a carefully designed process. Here is what sets our doors apart.  

• Precision Manufacturing: Doors are built to spec with tight tolerances, ensuring they fit perfectly on arrival. 

• Quality Checks: Each door is inspected for alignment, finish, and hardware placement—so there’s no last-minute surprises on site.  

• Protective Packaging: Heavy-duty wrapping, custom crating, and careful pallet placement mean your commercial

Choosing the correct door handing, also called door swing, is a critical part of specifying fire rated double doors. Door handing affects how the doors operate, how hardware is applied, and whether the opening meets fire and life safety requirements. For commercial double doors, including exterior steel double doors and interior fire-rated openings, understanding handing helps avoid installation errors, inspection failures, and costly rework.

Whether you are specifying a double door fire rated opening for a corridor, stairwell, or exterior wall, door handing must work in coordination with fire-rated hardware. Below is a clear breakdown of the most common handing options used for a double fire door and how each functions.

Types of Door Handing for Fire Rated Double Doors

Left-Hand Active

In a left-hand active configuration, the left leaf is the primary operating door. It contains the latch and opens first during normal use. The right leaf is typically the inactive door secured with vertical

When it comes to schools, even small door issues can turn into big problems fast. From daily disruptions to serious safety concerns, school doors play a major role in how smoothly a building operates. Every classroom door and set of school entrance doors must work reliably to support student movement, security, and compliance.

In busy learning environments, a damaged or poorly functioning school classroom door can slow down hall traffic, create safety risks, and lead to costly repairs if problems are ignored. Understanding the most common issues with doors for schools, and knowing how to fix them, helps administrators and facility managers keep buildings safe, efficient, and ready for everyday use.

Door Misalignment and Sagging

One of the most common problems with a classroom door is misalignment. Over time, frequent use can cause doors to sag, drag on the floor, or fail to close and latch properly. In high-traffic school doors, this is often caused by worn hinges, loose fasteners, or

Commercial door installation mistakes can lead to expensive delays, failed inspections, and unnecessary rework — but most of them are completely preventable.

In this video, we break down the 5 most common commercial door installation mistakes and show you exactly how to avoid them so your project stays on schedule and within budget.

Avoid Costly Commercial Door Installation Mistakes

Installing commercial steel doors and frames requires precise planning and accurate specifications. Many of the most expensive problems—like failed inspections or field modifications—actually start long before installation begins.

Understanding these common mistakes can help contractors, project managers, and facility teams avoid delays, reduce costs, and ensure code compliance from day one.

What You’ll Learn in This Video

• Why incorrect rough openings create major installation and alignment issues

• How selecting the wrong frame type leads to costly fitment problems

• The importance of confirming fire ratings

Before you measure a door rough opening, there are several critical decisions that must be made first — and skipping this step is one of the most common causes of ordering mistakes in commercial door projects.

In this video from CDF Distributors, we walk through what needs to be determined before you ever pick up a tape measure so your door system is specified correctly the first time.

Watch this detailed video from CDF Distributors to learn how to choose the best school doors for safety, security, and code compliance. We guide contractors, facility managers, and school decision-makers through key considerations to ensure durable, secure, and compliant door solutions for educational facilities.

Why School Door Selection Matters

Choosing the right school doors is essential for maintaining safety, ensuring code compliance, and supporting daily operations. From classroom doors to main entrances, every opening plays a role in protecting students, staff, and visitors while withstanding heavy use.

CDF Distributors provides expert guidance to help you select commercial-grade doors that meet safety standards and perform reliably in high-traffic environments.

 What You’ll Learn in This Video

• The best materials for high-traffic school classroom doors (hollow metal vs. steel core)

• When and where fire-rated doors are required for code compliance

• How to choose secure school entrance

What steps do you take to prepare for commercial door installation? Setting up tools and taking measurements are important, but we recommend starting a little earlier to ensure a smooth and easy installation process. Proper preparation for commercial door installation starts before your door packages are delivered to the jobsite. In fact, it often begins before you even place an order.

If you prefer a video format, check out our video below, or find us on YouTube.

Where Does Preparing for Installation Begin?

As mentioned above, preparing for commercial door installation starts before ordering doors. The first step is to determine the type of door, frame, and hardware your project requires. This applies whether you are planning warehouse door installation, commercial glass door installation, or commercial metal door installation. You will need to consider how much traffic the door will see. High-traffic openings often require heavier-duty doors and hardware.

Next, determine the door size