Concealed door closer

Product Description

A concealed overhead door closer is a hydraulic door control device. It is installed inside the top edge of the door leaf or within the door frame, making it completely invisible when the door is closed.

Unlike surface-mounted closers that attach to the door face, this concealed design preserves the clean, unblemished appearance of prestige doors. It provides the same reliable closing control required for fire safety and accessibility compliance.

Concealed door closer

Whether specifying hardware for a high-end commercial lobby or a modern architectural space where visible hardware is unacceptable, the concealed overhead door closer delivers functionality without compromising aesthetics.

Concealed closers are available in door-mounted configurations and frame-mounted configurations. Most models are suitable for wood, hollow metal, and aluminium doors with a minimum thickness of 40mm.

What Are the Types of Concealed Overhead Door Closers?

A common question concerns the different installation options available.

Door-Mounted (In-Door) Concealed Closers:
These are mortised into a pocket cut into the top edge of the door leaf. The closer body sits inside the door, with a concealed arm connecting to a track or pivot plate mounted on the frame header. This configuration requires door thickness of at least 40mm to accommodate the closer body. It must be prepared at the door factory before the door is hung.

Frame-Mounted (In-Frame / Transom) Concealed Closers:
These are installed in the door frame header or transom above the door. The closer body is hidden within the frame, with an arm extending down to the door. This configuration requires the frame to be fabricated with appropriate mounting provisions before installation. Some systems incorporate a concealed double-swing transom closer for timber doors, eliminating the need for floor spring excavations.

What Are the Key Features and Benefits of Concealed Overhead Closers?

The concealed overhead door closer offers several advantages over surface-mounted alternatives.

Cam-action technology provides a rapid decrease in opening force. This makes doors significantly easier to open while maintaining reliable closing power. This technology also allows for a more compact closer body, enabling installation in standard door thicknesses.

Vandalism protection is a key benefit. Concealed installation offers optimum protection against vandalism and tampering, as the mechanism is hidden inside the door or frame and cannot be easily accessed or damaged. This makes concealed closers an excellent choice for problem entrances where surface-applied closers are frequently damaged.

Adjustable closing force and speed are standard features. Quality concealed closers feature multiple adjustment points, including closing speed, latching action, and backcheck cushioning that slows the door when opened with excessive force.

Concealed door closer

Hold-open options are available on many models. These can be mechanical hold-open features that allow the door to be held open at a specific angle and released with a gentle pull. Electro-magnetic hold-open options linked to fire alarm systems are also available for fire door applications.

What Are the Specifications and Sizing Options?

Concealed overhead door closers are rated according to EN 1154 or ANSI and BHMA standards.

Closing force ratings are adjustable across standard sizes. Maximum door widths and weights vary by model. Door thickness requirements range from 40mm to 50mm depending on the model. Opening angles are typically up to 120 or 130 degrees.

For applications requiring a concealed jamb-mounted closer, some models feature high cycle endurance testing, UL approval, and maximum door weight ratings suitable for flush wood and hollow metal doors of specific widths.

How Do You Install a Concealed Overhead Door Closer?

Installation of concealed overhead closers requires careful planning and factory preparation.

The mortise pocket must be cut at the door factory using the manufacturer’s template before the door is shipped. Field mortising of a hollow metal door produces inconsistent results and risks damaging the door construction.

The frame header must also be fabricated with the correct mounting holes for the arm or track assembly before shipping. For this reason, concealed closers cannot be easily retrofitted into installed doors without completely removing the door and potentially compromising its structural integrity.

Why Choose a Concealed Overhead Door Closer?

Concealed overhead door closers are the standard for several applications.

Concealed door closer

For architecturally significant spaces, visible hardware would detract from the design intent. For historic preservation projects, surface mounting hardware on designated historic fabric is often prohibited.

For high-end hospitality and retail, clean, hardware-free door faces are required in public areas. For high-traffic commercial buildings, vandalism of surface-mounted closers is a concern.

Note on Cost:

Overhead concealed closers typically cost 3 to 5 times more than equivalent-grade surface-mounted closers in unit cost. This does not include additional door preparation labour.

The correct specification question is whether the architectural program requires concealment for a specific opening.