What is the difference between a continuous hinge and a standard hinge?

A standard hinge attaches at two or three fixed points along a door edge, concentrating stress at those spots. A continuous (piano) hinge runs the full height of the door, distributing weight and load evenly across the entire door height. This dramatically reduces wear on both the hinge and the door frame — a measurable advantage on doors that open and close dozens or hundreds of times per day.

Do continuous hinges work on fire-rated and AODA-compliant doors?

Yes. Many continuous hinge models are available in fire-rated configurations and are compatible with AODA-compliant door hardware. When Treco specifies hardware for a commercial door project, we confirm that every component — hinge, closer, latch, and threshold — is rated and approved for the application.

Repair or replace: how do I know which one my door needs?

If the door leaf and frame are structurally sound but hinges are worn or loose, a hinge upgrade is usually the right call. If the door is warped, the frame is out of square, or the steel has sustained impact damage, a full door and frame replacement is more cost-effective long-term. Treco assesses both in the same visit.

Commercial & Access Control Updated June 27, 2026

Upgrade Your Doors with Continuous Hinges (Piano Hinges)

By Treco Locksmith & Security · rated 5★ across 205 Google reviews · serving Burlington & Hamilton

Commercial doors take a beating. A busy retail entry, a school corridor door, a hospital service entrance — each one may swing open and close several hundred times a day. Standard butt hinges, typically mounted at two or three points along the door edge, concentrate that stress at those exact spots. Over months and years, the result is predictable: worn-out knuckles, loosened screws, sagging leaves, and a door that drags, gaps, or simply fails.

Continuous hinges — also called piano hinges — are designed specifically to solve this problem in high-demand environments.

What Makes a Continuous Hinge Different

A continuous hinge runs the full height of the door, from top rail to bottom rail. Instead of loading stress onto two or three points, the weight and swing force of the door is distributed evenly across every inch of the hinge. The mechanical advantage is straightforward: more bearing surface means less wear per unit of area, which translates directly to a longer service life.

For a standard interior office door that opens a few times a day, a pair of butt hinges is entirely adequate. For a commercial steel door at a busy service entrance, a heavy vestibule door, or an emergency exit that sees constant traffic — a continuous hinge is the right hardware specification from the start.

Common commercial applications include:

High-traffic retail and institutional entry doors
Service and delivery corridor doors
School and healthcare facility doors
Server room and electrical room access doors
Stairwell and fire exit doors

Why Door Sagging Is a Security and Compliance Problem

A sagging door is more than an inconvenience. When a door drops even a few millimetres out of alignment, strike plates stop engaging cleanly, latches fail to throw fully, and the gap between the door and frame can exceed code tolerances. On fire-rated doors, a gap that prevents a proper seal can mean a failed inspection. On AODA-accessible entries, misalignment affects the force required to open the door — a compliance issue for any Ontario business required to meet accessibility standards.

Door sagging also accelerates wear on the frame and on other hardware. A deadbolt that has to fight a misaligned strike on every throw wears its tailpiece and cam faster. An automatic door operator working against a sagging door will pull more current and wear its clutch and drive components prematurely.

Catching the problem at the hinge stage — before it cascades — is nearly always the lower-cost outcome. Our post on why door alignment matters covers the full picture of what misalignment affects across a door assembly.

Signs Your Commercial Door Needs a Hinge Upgrade

Continuous hinges are not always the answer, but they are worth evaluating any time you see:

A door that drags or scrapes the floor at the latch-side corner
Visible gaps between door and frame when the door is closed
Loose hinge screws that have been tightened repeatedly (a sign the frame material is fatigued)
Knuckle wear or play in existing hinges
A door that requires a firm pull or push to latch

Any of these symptoms can also indicate frame damage or a door that has warped beyond hinge correction. A proper assessment tells you which it is.

Repair vs. Replace: Making the Right Call

At Treco, when we assess a commercial door for hinge wear, we look at the full assembly — not just the hinge.

If the door leaf is straight and the frame is plumb, a continuous hinge upgrade is typically a half-day job that extends the door’s service life significantly. If the frame has shifted, the door has sustained impact damage, or steel corrosion has compromised the edge, a full commercial door and frame replacement is the more cost-effective path. Installing a precision hinge on a warped door or a damaged frame just defers the inevitable and costs more in the end.

We carry continuous hinges in standard steel and stainless steel finishes, in both full-surface and half-surface configurations to suit different frame types. Fire-rated variants are available for doors that require them.

Serving Burlington, Hamilton, and Halton Region

Treco Locksmith & Security works with commercial property managers, facilities teams, and business owners across Burlington, Hamilton, Oakville, and the surrounding Halton region. Whether you need a single door assessed or want hardware standardized across a multi-unit facility, we bring the same attention to specification and installation.

Our commercial locksmith services cover the full door and hardware system — hinges, closers, exit devices, access control, and everything between. If your doors are showing wear, reach out to schedule an assessment.

commercial-doorsburlingtonhamilton