Commercial

Continuous Hinge Repair & Replacement in Ottawa: Common Problems, Costs & When to Replace

If a door runs the full height of its frame on a single long hinge — the kind you see on school entrances, restaurant kitchens, or apartment vestibules — that is a continuous hinge. It is one of the most durable hinge styles made, but durable does not mean bulletproof, and when one fails it usually affects the whole door.

This guide covers what continuous hinges are, why they fail, what repair and replacement actually look like, and how to tell which one your situation calls for.

What is a continuous hinge?

A continuous hinge runs the full height of a door, from top to bottom, instead of using two or three individual hinges spaced along the edge. The hinge is a single extruded piece — typically aluminum or steel — with a pin running through interlocking knuckles along its entire length.

The load from the door is distributed across the entire frame edge rather than concentrated at two or three points. That is the main reason continuous hinges show up on heavy-traffic doors in commercial buildings: less stress per square inch means longer service life and fewer alignment problems over time.

They are sometimes called piano hinges because the same design has been used on piano lids for well over a century. The name stuck, so do not be surprised if a supplier or technician uses both terms interchangeably.

Where continuous hinges are commonly used

You will find them on:

• School doors — particularly gymnasium and cafeteria entrances where doors take a beating from hundreds of students a day.
• Restaurant kitchen doors — high-frequency push/pull traffic, often with people carrying trays or pushing carts.
• Medical clinics and hospitals — doors that need to open cleanly under load, including doors wide enough for wheelchairs or gurneys.
• Apartment vestibules and laundry rooms — where a door gets used dozens of times a day by multiple tenants.
• Office lobbies and server rooms — often because fire-rated doors in these locations benefit from full-length load distribution.
• Retail storefronts with aluminum frame doors — particularly glass-heavy doors where point loading from standard hinges causes frame stress.
• Warehouses and storage facilities — on fire exit doors, heavy steel doors, and utility room entries.

In residential settings, continuous hinges sometimes appear on exterior doors with custom frames, storm door applications, or high-end entry doors. But the bulk of the work we see in Ottawa is commercial — much of it tied into broader commercial door repair.

Why commercial buildings choose continuous hinges

Standard butt hinges work fine on most residential doors. The reason commercial buildings specify continuous hinges comes down to traffic and liability.

A door in an office building might open and close 200 or 300 times a day, and a school cafeteria door could see double that. Standard hinges under that load develop play in the knuckles, the screws work loose from the frame, and the door starts sagging within a few years. With a continuous hinge, the load is never concentrated in one spot, so the hardware lasts longer and the door stays aligned longer.

There is also a structural argument. On aluminum-framed glass doors especially, point loading from standard hinges can distort the frame over time. A continuous hinge spreads that load and protects the frame integrity.

Common reasons continuous hinges fail

Even well-made hardware wears out. The most common causes of failure we see:

Corrosion

Aluminum continuous hinges in high-moisture environments — outdoor vestibules, restaurant kitchens, facilities near the Ottawa River — can oxidize. The pin corrodes, the knuckles seize, and the hinge starts binding or grinding.

Improper installation

A hinge that was not installed with the door properly aligned in the frame wears unevenly from day one. We see this often on replacement doors where the frame was not squared before the new door went in.

Stripped screw holes

The hinge itself may be fine, but if the screws have stripped out of the door or frame, the hinge shifts. This is common in aluminum doors where the material is softer and threads do not hold as long under repeated stress.

Physical damage

A door that has been hit by a cart, propped open with something heavy, or slammed repeatedly against a wall stop can bend the hinge leaf. Even a slight bend changes the swing geometry and causes binding.

Worn pin

On high-traffic doors, the pin inside the knuckles wears down over years. The hinge develops lateral play, the door wobbles slightly when opening, and eventually the alignment goes off.

Signs your continuous hinge needs attention

Signs it needs adjustment

• The door drags slightly on the floor at the bottom or catches the frame at the top.
• The latch does not line up cleanly with the strike plate.
• There is a soft grinding or squeaking when the door opens.
• The door swings freely when it should latch, or takes extra force to close.

Signs it needs replacement

• Visible bending or cracking along the hinge leaf.
• The door sags noticeably when open and does not return to true.
• The hinge knuckles are cracked or broken.
• Corrosion has seized the pin and the door no longer swings freely.
• The mounting holes have widened enough that the hinge shifts under load.

Can a damaged continuous hinge be repaired?

Sometimes, yes. If the problem is corrosion on the pin, it is often possible to drive out the old pin, clean the knuckles, and reinstall with a new pin and fresh lubrication. If the issue is stripped screw holes, the holes can be filled with an appropriate epoxy compound, allowed to cure, and re-drilled — or the hinge can be remounted with longer screws into solid material behind the frame.

What usually cannot be repaired is a bent or cracked hinge leaf. Once the aluminum or steel is deformed, it will not hold true. Straightening sheet metal sounds simple, but the stress distribution changes and the repair fails quickly under normal use. In those cases, replacement is the right call.

The honest answer is that repair makes sense when the hinge body is intact and the problem is mechanical — loose fasteners, worn pin, light corrosion. When the hinge itself is damaged or has worn past the point where adjustment holds, replacement costs less in the long run. This is the same judgement we apply across all hinge and hardware repair.

What causes door sagging with a continuous hinge?

Door sagging is not always the hinge's fault. We get calls about sagging on doors with continuous hinges that are still in decent condition. The actual problem is usually one of these:

Frame settlement

In older Ottawa buildings, frame movement over winter and spring can shift the rough opening enough to throw a door out of square.

Worn threshold or closer

A door closer set too aggressively, or a floor-mounted closer that is worn, can pull the door out of alignment independent of the hinge. That overlaps with door closer repair.

Door warping

Wood-core commercial doors can absorb moisture and warp, particularly if the door seal is failing. The door itself is no longer flat.

Fastener failure

The hinge is only as good as what it is fastened to. If the frame is hollow at the mounting points and the screws are not reaching solid material, the hinge shifts even when it is undamaged.

This is why a proper diagnosis looks at the whole system — hinge, frame, closer, threshold, and door — rather than just replacing whatever is most visible. When the jamb itself is the issue, it becomes door frame repair.

Common installation mistakes

Most of the premature hinge failures we repair trace back to the original installation:

• Mounting on an out-of-square frame. If the frame is not plumb before the hinge goes on, the door binds from day one.
• Using screws that are too short. Particularly in aluminum frames, short screws do not reach solid material and work loose quickly.
• Not pre-drilling. Driving screws without pilot holes in aluminum or solid wood crushes the material around the fastener and weakens the hold.
• Installing the wrong gauge hinge for the door weight. A continuous hinge has a rated load capacity. A heavy steel fire door needs a heavier gauge than a hollow-core interior door.
• Skipping lubrication. New hinges should be lubricated at installation. Running a dry pin from day one accelerates wear.

Maintenance tips

Continuous hinges do not need much attention, but a little routine care extends their life significantly.

• Lubricate the pin every year or two with a dry lubricant or light machine oil. Avoid WD-40 for long-term lubrication — it displaces moisture but does not provide a lasting film.
• Check fastener tightness annually on high-traffic doors. A quarter-turn before it becomes a problem is a five-second job; waiting until the hinge shifts is a half-hour repair.
• Keep the hinge clean. In restaurant kitchens especially, grease and debris build up in the knuckles and accelerate wear.
• If a door is hitting a wall or hard stop repeatedly, install a proper door stop. Impact loading is one of the fastest ways to damage a hinge.

The repair and replacement process

Typical repair

We remove the door, assess the hinge and frame condition, address whatever is causing the problem — whether that is re-fastening, pin replacement, or frame repair — rehang the door, and check the full swing and latch alignment before leaving.

Typical replacement

The door comes off, the old hinge is removed, the mounting surfaces are cleaned and inspected, any damaged material in the frame or door edge is addressed, the new hinge is mounted and aligned, and the door is rehung and tested. On a commercial door with a closer, we also check and adjust the closer after the hinge is in place, since closer adjustment and hinge alignment interact.

Approximate costs in Ottawa

Every job is different. A simple adjustment on a residential door with a loose continuous hinge runs considerably less than a full replacement on a fire-rated commercial door with an aluminum frame and concealed closer. Costs depend on the hinge gauge and material, the door type and weight, whether the frame needs repair, and how accessible the door is.

The only accurate way to give you a number is to look at the door in person. We do not quote blind — too many variables affect the job. For continuous hinge repair and commercial door repair in Ottawa, call us for an inspection and we will give you a straight quote on the spot.