Bi-Fold Doors

In-Swing

Out-Swing

These exterior steel center split bi-fold door thresholds differ slightly from inswing to outswing models, however both have an exterior side that slopes gently downward. These thresholds are made from one continuously piece cold-rolled air series steel, with a flatbar added to the bottom, increasing the structural integrity of the unit. An aluminum u-channel is integrated into the threshold of these center split bi-fold doors, stabilizing the lower guide pin rollers and allowing the doors to fold smoothly.

These standard exterior steel center split bi-fold doors are pre-hung and include the door panels and broken down frame (packaged separately for ease of transport and installation). The frame is assembled via bolts that are included with your order. A top cover cap is also included to hide the top rolling hardware on the upper portion of the frame. The jamb size is measured at 6” deep (net size) and made from cold-rolled air series steel. Custom jamb sizes are available via our made to order section.

These exterior steel center split bi-fold doors come standard with modern bullet hinges, and include a screwed in grease fitting, allowing you to maintain and grease the hinges regularly via a standard grease gun. 

One copper crush washer per hinge is included and required prior to hanging the door onto the frame. These washers protect the hinges by introducing a softer copper metal between the 2 hinge components in order to absorb the friction and allow the doors to swing smoothly. This hinge system is far superior to ball bearing systems, as the bearings are made of stainless steel, which is a harder metal inside a steel barrel, causing wear to both components and sagging over time.

These exterior steel bi-fold doors include all necessary rolling / hinge hardware for the doors to function. Below is a list of parts included with all standard bi-fold doors.

An astragal is the welded component on the doors that provide a seal preventing exterior elements such as air and light from penetrating into the home. These standard steel exterior center split bi-fold doors come equipped with an astragal on each door panel, ensuring a tight seal and preventing exterior elements from entering your interior space, adding to the efficiency of the doors.

These standard steel exterior center split bi-fold doors come standard with dual foam weather stripping. This weather stripping comes pre-installed around the entire frame of the door, as well as down the full length of the astragals. This full suite of weather stripping acts as a barrier from outdoor elements and helps prevent cold or hot air from leaking out of the home, resulting in a much more energy efficient product.

These standard steel exterior center split bi-fold doors come with pre-installed rubber door sweeps at the bottom of each door leaf. These door sweeps create a tight seal between the threshold and the door leafs themselves, preventing outside elements from entering your home. This simple yet effective feature helps insulate your space, improving energy efficiency.

These standard steel exterior center split bi-fold doors come filled with a polyurethane foam core, which acts as a sound deadening material, and also provides some insulating properties for better energy efficiency. The foam also helps prevent moisture from accumulating inside the steel tubes, contributing to the door's longevity.

Please note, this foam should not be confused with a thermally broken barrier. For more extreme weather conditions dropping below 27 degrees Fahrenheit, please inquire about our thermal break models.

These standard steel exterior center split bi-fold door frames feature welded mounting tabs designed to be installed from the interior of your space. The tabs are inset to allow for 5/8” drywall to be installed flush with the face of the frame. Each tab features two pre-drilled lag holes for a more flexible installation, though only one lag bolt per tab is required.

These standard steel exterior center split bi-fold door leafs come standard at 2” thick, providing both security and durability.

Steel doors offer many more enhanced security features when compared to their wood, fiberglass, vinyl, or aluminum counterparts. These standard steel exterior center split bi-fold doors are made with cold-rolled air series steel, which contains a galvanized mix to help prevent corrosion and rust over time. A unique feature of this cold-rolled air series steel is that it is made from a single, continuous piece of rolled metal, eliminating the need for additional welds and fillers. This results in a stronger, more durable product, eliminating weak points from paint cracking and water intrusion.

How do I measure my jamb?

The goal is to get the measurement from the outermost finishing of your exterior (stucco, brick, concrete, wood, etc) to the face of the interior drywall.

How thick are your exterior steel center split bi-fold door jambs? 

These exterior steel center split bi-fold door jambs come standard at 6” thick. Custom jamb sizes are available via our made to order section.

Is the jamb the same thing as the frame? 

The jamb refers to the vertical components of the overall door frame. The jamb size refers to the thickness of those vertical components.

How does the frame mount to the wall? 

These standard steel exterior center split bi-fold doors feature welded mounting tabs designed to be installed from the interior of your space. The tabs are inset to allow for 5/8” drywall to be installed flush with the face of the frame. Each tab features two pre-drilled lag holes for a more flexible installation, though only one lag bolt per tab is required. Bolt through applications or nailer fins are available via request through our custom sales team.

Is the jamb included with the door?

Yes, the jamb is a component of the frame, which is made specifically for the door that it is packaged with.

Is the jamb/frame galvanized or zinc coated?

Yes, these exterior steel center split bi-fold door jambs and frames contain a galvanized mix to help prevent corrosion, rust, and finish issues when exposed to damp or moist conditions over time.

How is the jamb insulated?

We use a polyurethane foam filling in our exterior steel center split bi-fold doors jambs for sound deadening purposes, which also provides some insulating properties. Please note, this foam should not be confused with a thermally broken barrier. For more extreme weather conditions dropping below 27 degrees Fahrenheit, please inquire about our thermal break models.