Commercial Door Repair Guide

Whether you are dealing with a dropped aluminium shopfront door, a faulty overhead closer, or a jammed panic bar, prompt repairs are essential. Failing to maintain these entries can lead to insurance invalidation, fire safety breaches, and significant security risks for your premises.

What Does the Work Involve?

• Diagnostic Inspection: Assessing the door leaf, frame, pivots, and locking mechanisms to identify the root cause of the failure.
• Realignment: Re-hanging or adjusting hinges, floor springs, or pivots to ensure the door closes flush and latches correctly.
• Hardware Replacement: Swapping out worn components such as hydraulic closers, transom arms, panic bars, or lock cylinders.
• Safety Testing: Calibrating automatic sensors, testing emergency exit hardware, and ensuring access control systems interface correctly.
• Weatherproofing: Replacing worn glazing gaskets, brush strips, or threshold seals to improve thermal efficiency.
• Certification: Providing a service report confirming the door meets relevant British Standards for fire and safety.

Typical Costs

The cost of commercial door repairs depends on the type of door (aluminium, steel, or timber) and the specific hardware required. Specialist components like high-duty floor springs or fire-rated panic hardware carry a premium.

Factors such as out-of-hours emergency attendance, high-level glazing requirements, or the need for specialist access equipment (like a podium or tower) will increase the final invoice.

How Long Does It Take?

• Minor Adjustments: 1–2 hours for hinge tightening, closer speed adjustment, or lock lubrication.
• Standard Hardware Replacement: 2–4 hours for overhead closers, panic bars, or cylinder swaps.
• Major Repairs: 4–8 hours for floor spring replacements or re-glazing large commercial units.
• Complex Systems: Multiple days if bespoke parts must be ordered or if structural frame repairs are required.

DIY or Professional?

Commercial door repair is almost exclusively a professional task. Because these doors often serve as designated fire exits or high-security barriers, DIY repairs can lead to serious legal liabilities.

Under the Regulatory Reform (Fire Safety) Order 2005, the "Responsible Person" for a building must ensure all fire doors are maintained by a competent person.

Incorrectly installing a closer or using non-compliant hardware can prevent a door from self-closing during a fire, potentially resulting in prosecution or denied insurance claims. Always hire a specialist for any door that serves as a fire escape.

Choosing the Right Tradesperson

Look for a commercial carpenter or a specialist door engineer with specific experience in "Architectural Ironmongery."

• Check Qualifications: Look for ADSA (Automatic Door Suppliers Association) accreditation for powered doors or Guild of Architectural Ironmongers (GAI) membership.
• Red Flags: Avoid tradespeople who suggest "patching up" a fire door with non-rated parts or those who cannot explain the relevant BS EN standards.
• Ask: "Will you provide a certificate of compliance for the fire exit hardware?"
• Ask: "Do you stock common transom closers or pivots on your van for a first-time fix?"
• Ask: "Does your work come with a warranty that covers both the part and the labour?"

UK Regulations

• BS EN 1125: The standard for panic bolt and latch devices on escape routes where people are unfamiliar with the exit.
• BS EN 179: The standard for emergency exit devices used by people who are familiar with the exit (e.g., private offices).
• EN 16005: The safety standard for power-operated pedestrian doorsets.
• Building Regs Part M: Ensures doors provide adequate width and ease of opening for disabled access.

Common Problems

• The "Slamming" Door: Usually caused by a failed hydraulic seal in the closer; this is a safety hazard and can damage the frame.
• Floor Dragging: Often due to worn bottom pivots or a dropped leaf, which puts immense strain on the top hinges.
• Ghost Opening: When a door opens on its own, typically caused by poorly calibrated sensors or incorrect latch tension.
• Panic Bar Failure: Internal mechanisms can seize over time, meaning the door won't open under pressure during an emergency.

Frequently Asked Questions

Can you repair a commercial door that has dropped and is scraping the floor?

Yes, this is a common issue usually caused by worn pivots or hinges. A specialist can often realign the door by adjusting the top pivot or replacing the bottom bearing without needing a new door leaf.

How often should commercial fire doors be serviced?

In most UK commercial settings, fire doors should be inspected every six months. High-traffic doors (like those in schools or hospitals) may require more frequent monthly checks.

Do I need to replace the whole door if the glass is cracked?

No, most commercial aluminium or timber doors are designed for "beaded" glazing, allowing the glass to be replaced independently of the frame. Ensure the replacement glass meets BS EN 12600 safety standards.

Why is my door closer leaking oil?

Oil leakage indicates that the internal seals have perished. Once a closer leaks, it loses its hydraulic damping ability and cannot be repaired; it must be replaced for safety reasons.

Can a carpenter fix an automatic sliding door?

While a carpenter can fix the physical door leaf, the motor and sensors require an ADSA-qualified engineer to ensure the safety timings and force settings comply with EN 16005.