Regular, top jamb, parallel arm
ANSI/BHMA A156.4 · UL 10C · NFPA 80
Maryland, DC & Northern Virginia
A surface door closer is a hydraulic unit mounted on the face of a door or frame. An arm links the two. When someone opens the door, a spring inside the closer loads up. Oil then controls how fast the spring pulls the door shut and latches it. Surface closers are the most common closer type in commercial buildings. They fit most metal, wood and aluminum doors. They are simple to install, easy to adjust and built to handle heavy daily foot traffic for years.
Set closing speed and opening force to meet ADA rules and keep fire doors fully latched.
Doors close and latch every time, so locks engage and no one slips in behind staff.
Grade 1 closers are cycle tested to two million openings, built for the busiest public entrances.
King Locksmith and Doors Inc. is a commercial door and hardware company serving Maryland, Washington DC and Northern Virginia. Our technicians install, repair and adjust surface door closers for offices, schools, clinics, hotels and government buildings. We size each closer to the door’s weight, width, location and daily traffic. That means fewer callbacks, less downtime and lower long-term costs. Every job ends with a closer set for safe speed, firm latching and full code compliance.
The right closer depends on the door, the frame, the traffic and the codes that apply. Use these five checks to narrow your choice, or let our team assess the opening on site for you.
Surface closers mount in three main ways. A regular arm mounts on the pull side. A top jamb closer mounts on the frame on the push side. A parallel arm mounts on the push side with the arm folded along the door.
Parallel arm is the go-to for exterior and public doors. It keeps the closer on the secure side and resists abuse. Regular arm gives the most power. Top jamb fits narrow top rails.
Closer power is rated in sizes from 1 to 6. Bigger, heavier and wider doors need more power. Exterior doors facing wind or building pressure also need extra force to latch.
Most commercial closers are adjustable across several sizes, so one model can fit many doors. But too much power breaks ADA limits on interior doors. Too little leaves doors standing open. Our technicians set spring power on site for firm latching and easy opening.
ANSI/BHMA A156.4 grades closers by durability. Grade 1 is the highest and is cycle tested to two million openings. Grade 2 and Grade 3 are tested to fewer cycles and suit lighter use.
For busy hospitals, schools, lobbies, stairwells and government buildings, Grade 1 is the safe choice. These doors may open hundreds of times a day. A cheaper closer wears out fast, leaks oil and ends up costing more in service calls and replacements.
Many closers offer extra functions. Backcheck slows a door that is thrown open, protecting walls and hinges. Delayed action slows the start of closing for wheelchairs, carts and gurneys. Hold-open arms keep the door open at a set angle.
Fire-rated doors follow stricter rules. They cannot use mechanical hold-open arms. If a fire door must stay open, it needs a holder or closer tied to the fire alarm. On alarm, it releases the door automatically.
The ADA sets two key closer rules. A door moving from 90 degrees to 12 degrees must take at least 5 seconds. Interior doors that are not fire rated must open with no more than 5 pounds of force.
Fire doors must close and latch fully every time. NFPA 80 requires it, and fire marshals check it. Our team tests and sets closing speed, latch speed and force so your openings pass their next inspection.
Both closer types control how a door shuts. The difference is where they mount and what that means for cost, service and performance. Here is how the two stack up.
Consideration
Surface Door Closer
Concealed Overhead Closer
Lower product and labor cost per door
Costs more and needs frame prep
Mounts on existing doors and frames easily
Requires a prepared or modified frame head
Fully exposed for quick adjustment and repair
Harder to reach, adjust and replace
Handles heavy, wide and windy exterior doors
Limited power for large or heavy doors
Replaces worn closers with minimal downtime
Retrofits often mean frame cutting or replacement
Most closer problems start small and get worse with daily use. Watch for these four warning signs. Catching them early protects your door, your frame and the people passing through.
We install Grade 1 surface closers on new or existing doors, sized and set for each opening.
We fix loose arms and worn parts, and replace leaking closers before they cause injuries or damage.
We tune sweep speed, latch speed and backcheck so doors close smoothly, quietly and latch every time.
We adjust or replace closers to meet ADA closing time and opening force limits on your doors.
We install listed closers on fire-rated doors and correct closing issues flagged during annual fire door inspections.
Scheduled checks catch leaks, loose screws and drifting settings early, keeping every door across your sites working.
Tell us about your doors and we’ll assess them on site. Get recommendations and a free quote for closer work.
