Commercial door closer repair questions — overhead, transom, concealed and floor-spring closers across UK retail and commercial sites.
The most common causes are: a worn or leaking door closer (no resistance at the end of travel), a misaligned hinge or pivot pulling the door out of true, a damaged latch or strike plate, or hardware that has been adjusted incorrectly. A photograph of the door at rest and a short video of it closing usually let us diagnose remotely.
An overhead closer sits on the face of the door above the hinge and is visible. A transom closer is concealed inside the metal transom (the horizontal bar at the top of an aluminium door frame) — only the arm linking it to the door is visible. Transom closers are common on aluminium shopfronts; overheads are common on fire doors and timber doors.
A well-installed, correctly-adjusted closer on a moderately busy commercial door typically lasts 5–10 years. High-traffic retail doors burn through closers faster — 3–5 years is more typical, especially when the closer is set too aggressively and the door slams.
Yes — if the closer is structurally sound but closing too fast, too slow, or not latching, the closing speed and latch action can be adjusted via the valves on the closer body. Adjustment is the first step on any closer callout. Replacement is needed when the body is leaking fluid or the spring has gone.
Internal seals in the closer body wear and the hydraulic fluid weeps out. Once a closer has lost fluid the spring action can no longer be controlled — the door slams or fails to close. A leaking transom closer cannot be re-filled or repaired in situ; it must be replaced. The transom and frame stay in place.
Most diagnostics are completed remotely from a description, photo or short video — no site visit needed in most cases.
Get in touch
Head Office:
Commercial Door Maintenance and Security Ltd
61 Bridge Street,
Kington,
HR5 3DJ
t: 0800 774 7998
e: info@cdms-ltd.co.uk
Office Hours
Mon - Sat: 8am - 10pm
Sun: Closed
