Resource — Trade Replacement Guide

Replacement Commercial Aluminium Doors: Identify the System, Repair or Replace, Measure and Order

Repair a commercial aluminium door when the frame is sound and the fault is hardware — pivots, floor springs, closers, locks or dropped hinges. Replace the leaf, or the full doorset, when the leaf is twisted, the corner joints have worked loose, the profile is obsolete, or repeat call-outs are outpacing the cost of a new leaf fabricated to size. This guide gives maintenance contractors the full workflow: identify the system, make the call, measure, and order — from a fabricator with no stake in either answer.

By Stephen Chappell, Managing Director, Kingsland Fabrications. Updated 3 July 2026. Trade-only — we supply and fabricate; we don't install.

Repair or replace: how to decide on the spot

The call comes down to the frame and the corners. If the outer frame is square, firmly fixed and its corner joints are tight, almost any fault you are looking at — a dropped leaf, a dead closer, a jammed lock — is repairable hardware. If the leaf's corner joints have worked loose, the leaf is twisted, or the frame itself is failing, no hardware swap will hold: order a replacement leaf or doorset fabricated to size. Six checks settle it before you leave site:

Frame condition

Is the outer frame square, firmly fixed and free of corrosion at the feet? A sound frame keeps every option open — leaf-only replacement included. A failed frame closes them all: it is a doorset job whatever the leaf looks like.

Corner-joint integrity

Grip the leaf mid-swing and rack it gently. Visible movement along the corner-joint lines means the crimped joints have worked loose. That is structural, not hardware — the leaf is finished, however new the floor spring is.

Leaf twist

Sight down the lock stile with the door closed. A leaf that touches the frame top and bottom but stands off it mid-height is twisted — usually years of slamming against a dead closer. Twist does not adjust out.

Hardware availability

Floor springs, pivots and multipoint locks for current systems are stock items. If the system is obsolete and the exact part is unobtainable, a lasting repair may be impossible at any price — which quietly makes the decision for you.

Thermal-break era

A non-thermal door from the 1980s or 90s in a heated frontage will keep generating condensation and heat-loss complaints no matter how well it swings. If that is what the client is actually complaining about, no repair fixes it — that is a doorset conversation.

Repair history and cumulative cost

Pull the job history for the opening. When the next repair quote is approaching half the cost of a new supply-only leaf, replacement wins on lifecycle cost — the repair keeps the wear and the next failure; the new leaf resets the clock.

One thing worth knowing about who you ask. A repair firm earns from the repair, and an installation company earns from the replacement — both answers arrive with a bias built in. We only supply the metal: your engineers bill their labour whichever way the job goes, and we would rather tell a contractor the honest answer is a new floor spring than sell a doorset that did not need to exist. Contractors who get a straight verdict on the repair jobs come back when the answer is a leaf.

"The doors that cost maintenance contractors money aren't the ones they replace — they're the ones they repair four times first. Track the spend per opening and the decision usually makes itself."

— Stephen Chappell, Managing Director

Why commercial aluminium doors drop — and when it's terminal

A dropped door is the single most common commercial door call-out, and the cause splits cleanly into two lists. One list is hardware and adjustment; the other is the leaf itself.

Usually fixable

Worn bottom pivot or floor spring — the most common cause by a distance
Loose or worn top pivot letting the leaf lean
Lost toe-and-heel: the glass has slipped in its packers, and re-wedging it restores the leaf's diagonal stiffness
Failed closer leaving the door to slam itself out of adjustment

Usually terminal

Crimped corner joints worked loose — the leaf racks into a parallelogram that no packer squares
Leaf twist from years of slamming against a failed closer
Corrosion at the threshold, in the bottom rail or at the frame feet
Obsolete profile with unobtainable hardware — repairable in theory, not in practice

The reason a racked leaf is terminal is how commercial aluminium doors are built. UK commercial aluminium is mechanically joined — crimped corners and cleats, not welds — so once a corner joint has worked loose there is nothing to dress straight or re-weld. The joint held the leaf square; with it gone, the leaf is done. Ten minutes on site tells you which list you are on: check the gap pattern around the leaf (tight at the top leading edge and wide at the bottom points at the pivot; an even gap with the leaf out of plane points at twist), lift the leading edge by hand to feel for pivot movement, rack the leaf gently to test the corners, then check whether the glass has slipped in its packers. Photograph what you find as you go — the same photos drive the quote later. The hardware and operation section of our glossary covers the terms if the client wants the finding in writing.

How to identify which aluminium door system you're looking at

Every replacement enquiry starts with the same question: what system is this? Two measurements and three photos answer it in nearly every case. Measure the frame depth (front to back across the jamb) and the stile width (a tape laid across the lock stile), then photograph the full elevation, the stile with the tape in shot, and the pivot or hinge detail. The frame depth alone eliminates most candidates — commercial door systems cluster at distinct depths — and the bead style, pivot arrangement and sightlines settle the rest.

We fabricate Jack Aluminium systems day to day, but replacement work means recognising everyone else's, because the door in front of your engineer could be from any systems house of the last forty years. These are the ones that come up most:

System	Systems house	Where you'll meet it	First checks
JD47	Jack Aluminium	Retail shopfronts, high streets, shopping centres	Non-thermal, 47mm frame depth, 50mm sightlines; 6–28mm glazing; typically floor-spring hung with integral external beading
TD68	Jack Aluminium	Offices, schools, public and healthcare buildings	Thermally broken, 68mm frame depth; 24–44mm glazing; heavy leaves on pivots rated to 250kg; anti-finger-trap stiles
190 series	Kawneer	Decades of retail and office stock	Long-serving heavy-duty entrance door with several stile widths — measure the stile rather than assume; often sits in Kawneer framing
GT55	AluK	Shopfronts, education and commercial entrances	Commercial swing-door family with a nominal 55mm depth — a mid-50s frame-depth reading is the first pointer
SPW501	Senior Architectural Systems	Education and healthcare framework projects	Check for Senior framing and windows on the same elevation — systems tend to travel together across a building
Smart Systems (various)	Smart Architectural Aluminium	Broad commercial door and shopfront use	Widely fabricated, so visual tells vary — the stile photo and depth measurement do the identifying
Comar (e.g. 7P.i)	Comar Architectural Aluminium Systems	Office and public-sector stock, usually within Comar screens	Look at the surrounding framing profile — the door is usually part of a wider Comar elevation

Profile cross-sections in our Warrington workshop. Depth, sightline and bead detail differ enough between systems that a stile photo with a tape across it usually identifies the door.

If the system turns out to be discontinued, the job is still on. A matching leaf can usually be fabricated in a current compatible profile with the same sightlines and hardware preps, powder-coated to the existing RAL. Where nothing current will marry to the old frame — different rebates, different thermal era — the honest answer is a new doorset, and we will say so rather than force a leaf that half-fits.

The practical shortcut

Send us three photos — the full door, a stile close-up with a tape across it, and the pivot or hinge detail — plus two measurements: stile width and leaf thickness. We'll identify the system and talk your options through the same day.

Send them over WhatsApp or call 01925 500 295 from site.

Can you order just a replacement leaf, or do you need the whole doorset?

You can order a leaf on its own — it is one of the most common replacement orders we fabricate — but only when three conditions hold. Almost nobody publishes a straight answer to this, so here it is.

Leaf-only works when:

The system — or a compatible current profile — is still in production, so the new leaf marries to the old frame's rebates and seals.
The frame is square, sound and firmly fixed — a new leaf hung in a failing frame inherits every one of its problems.
The lock, pivot and closer preps can be replicated, so the existing hardware positions carry straight over and the swap stays a one-visit job.

Order the full doorset when: the frame's own corner joints have failed; the thermal-break eras mismatch — hanging a thermally broken leaf in a non-broken frame solves nothing, because the frame keeps conducting the heat and growing the condensation; or the threshold needs rebuilding for level access, which is a frame job by definition — our thresholds and level-access guide covers that decision in detail.

Colour matching, honestly: a fresh RAL 7016 leaf hung against powder coat that has weathered for fifteen years will read slightly different — new anthracite is darker and glossier than faded anthracite. The options are to colour-match to the weathered shade rather than the original RAL, have the surrounding framework resprayed on site by a specialist, or accept the difference. Most clients accept it when it is explained before the order rather than discovered after — so we explain it before the order.

How to measure for a replacement commercial aluminium door

Six steps, one site visit. This is exactly what we need to quote and fabricate — nothing here is optional padding. For a printable version, use our replacement survey checklist.

Confirm leaf-only or full doorset

Check the outer frame first: square, firmly fixed, corner joints tight means a leaf-only order. A failed frame, a thermal-break mismatch or a threshold rebuild means measuring for a complete doorset instead.

Measure the opening at three points

Leaf-only: rebate-to-rebate width and height, each taken at three points — work to the smallest. Full doorset: the structural opening brick-to-brick, again at three points, again to the smallest.

Record the leaf dimensions

Leaf thickness and stile width, taken with a tape laid across the lock stile. These two numbers do most of the system identification as well as the sizing.

Map the hardware

Lock height and backset, pivot centres and spindle position, and the closer or floor-spring make and model if a badge is visible. Preps we can replicate exactly are what make the swap a one-visit job.

Check the threshold and floor levels

Note the threshold condition and the finished floor levels both sides. If the entrance is on an accessible route, flag it — Approved Document M expects level access with a maximum 15mm threshold upstand.

Photograph and send

Full elevation, stile close-up with the tape in shot, and the pivot or hinge detail. Send the photos with the sizes and we return a quote with a CAD drawing within 24 hours.

Ordering: lead times, colour and first fit

Standard lead time is 21 working days from approved sizes. For genuine emergencies — a frontage that will not secure — faster turnaround is possible by arrangement, and the single biggest factor in how fast is how complete the information arrives: sizes at three points, the three photos, the hardware spec and the RAL number up front, with no round of follow-up questions in the middle. Quotes come back within 24 hours with a CAD drawing, so what you approve is the drawing of the exact door being fabricated.

What arrives on the pallet is the finished job: the leaf or doorset fabricated to your sizes on TD68 or JD47 profiles as the spec demands, hardware fitted or prepped to your positions, glazed and beaded where specified, labelled by opening reference, delivered from our Warrington workshop throughout mainland Britain. Every kit is assembled and jig-tested before dispatch.

99% of Kingsland kits fit first time — and for a maintenance contractor that is the number that matters, because it means the swap happens in one site visit, with no second call-out to adjust a leaf that never quite fitted.

Frequently asked questions

Can a dropped commercial aluminium door always be repaired?

Usually, if the cause is hardware: a worn floor spring, bottom pivot or lost toe-and-heel wedging can all be corrected. It cannot be economically repaired when the leaf's crimped corner joints have worked loose or the leaf is twisted — no amount of packing squares a racked leaf, and that is when you order a replacement fabricated to size.

How much does a replacement commercial aluminium door leaf cost?

There is no honest flat rate — the price of a leaf fabricated to size is driven by its dimensions, the glazing specification, the hardware preps that need replicating and the finish, and a complete doorset always costs more than a leaf alone. Send sizes and photos and we return a supply-only quote with a CAD drawing within 24 hours, so you price the job on a real number rather than a guess.

How quickly can a replacement leaf be fabricated?

Standard lead time is 21 working days from approved sizes. For emergencies — a shop that cannot lock up — faster turnaround is possible by arrangement if you send sizes, three photos and the hardware spec up front. Call first; the front-end information is what compresses the timeline.

What if the door system is discontinued?

A matching leaf can usually be fabricated in a current compatible profile with the same sightlines and preps, colour-matched by RAL powder coating. If the old frame itself is failing, a new doorset in a current system is the honest recommendation — retrofitting into a failed frame just books the next call-out.

Do replacement commercial doors have to meet Part L or Part M?

A like-for-like leaf swap into an existing frame is generally treated as a repair. Replacing the complete doorset is a controlled fitting, so the new doorset needs to meet the thermal requirements of Approved Document L — in practice a thermally broken system — and entrances on accessible routes should provide level access with a maximum 15mm threshold upstand under Approved Document M. We flag both at quote stage.

What do you need from me to quote a replacement door?

Three photos (full elevation, stile close-up with a tape across it, pivot or hinge detail), leaf or opening sizes measured at three points, hardware spec and colour. We will identify the system, talk through leaf-only versus doorset, and return a quote with a CAD drawing within 24 hours.