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Cleanroom cleaning · Greater Montreal

Your cleanroom needs a
written cleaning procedure.

Your manufacturer builds the room — then hands you a manual saying the cleaning methodology is yours, not theirs.

And your warranty conditions depend on getting it right. Most operators read that line for the first time after the room is built.

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Cleanroom and controlled-environment cleaning across Greater Montreal · Bilingual, insured, CNESST-compliant · $5M liability · Every engagement under a confidentiality agreement.

The short answer

A cleanroom cleaning SOP is the written procedure that governs how your room is cleaned — and your manufacturer requires you to have one.

At minimum it defines four things: the steps, the products and their exact concentration, the required contact time, and the frequency.

The manufacturer tells you what's compatible with their surfaces, then disclaims responsibility for your method. Writing and executing the procedure is yours.

That's the part we do — built with you, executed to your ISO classification, and logged every visit. No cameras in your classified space.

The gap nobody warns you about

Sound familiar?

✕The room is nearly finished and you've just read that the cleaning methodology is your responsibility.
✕You have a list of approved products but no procedure telling anyone how to use them.
✕Nobody on the team has written an SOP before, and the manufacturer won't write it for you.
✕Your general cleaning contractor has never worked to a contact time in their life.
✕You can't prove what was cleaned, when, or with what — so an audit becomes an argument.
✕You suspect the wrong product on the wrong surface could cost you the warranty. It can.

A cleanroom is the most expensive room you will ever build and the easiest one to quietly degrade. The procedure is what stands between those two facts.

The requirement

Four things the procedure has to define.

Cleanroom manufacturers converge on the same minimum. Miss any one of them and what you have is a checklist, not an SOP — and two more decide whether it survives contact with a real shift.

✓

1 · The detailed steps

The full sequence, zone by zone, in order — including what is deliberately not touched, and where a surface must be sealed rather than cleaned.

✓

2 · Products and exact concentration

Not "a disinfectant" — the specific agent at a specific dilution. Any other concentration risks the surface, and anything off the approved list needs written approval first.

✓

3 · Required contact time

How long each agent must remain wet to work, and when residue must be removed. The most commonly broken element, and the hardest to see after the fact.

✓

4 · Cleaning frequency

Per task and per zone, driven by your ISO classification, what happens in the room, and your environmental monitoring results.

✓

Plus: who is qualified to do it

Gowning and entry protocol, training, and who is permitted in the room — the part that turns a written procedure into a repeatable one.

✓

Plus: how it is evidenced

An SOP nobody can prove was followed is an intention. The record is what makes it real.

Where the line sits: your cleanroom manufacturer defines what is compatible with the surfaces they built. Your industry defines what is required for what you make. The SOP is where those two meet — and it is the operator who owns it, not the builder.

In practice

What a working rotation looks like.

The general shape of a conventional programme. Yours is set from your classification, your process and your monitoring data — not from a template.

Routine disinfectant

Applied to work surfaces and high-touch points on a defined cycle, held for its full contact time, then residue removed before it dries.

Sporicide on rotation

Run at intervals informed by your environmental monitoring results rather than a fixed calendar — that's what the monitoring is for.

Detergent as needed

Periodically, where residue has accumulated after maintenance or construction work, followed by a rinse to clear the film.

The details that decide whether it worked: a damp cloth rather than a saturated one, particularly near thermostats, screens, gauges, interlocks and door operators; no abrasives on cleanroom surfaces; and a final pass that removes residual liquid from the places it collects — low air-return grilles, door frames and thresholds. These are the failures that don't show up until they've already cost something.

The part most operators can't answer

An SOP nobody can prove was followed is just an intention.

You're not hiring a cleaner — you're plugging into a system. A written procedure only means something if there is a record showing it was executed. Everywhere else we work, that record is photographic. In a cleanroom it isn't — phones and cameras are a particle source and are prohibited in most classified space. So the record is the log: every task captured as it's completed, with the product, dilution, contact time, zone, technician and timestamp. When your quality team or a client asks whether the procedure was followed on a given date, the answer is a record, not an assurance.

#1
Your SOP as the task list
Cleanroom scopeConfigured
Approved productsLocked
Contact timesSet
Zone sequenceSet
Every SOP element becomes a task. Nothing depends on a technician remembering the dilution.
#2
Logged execution — no cameras
Tonight's scope11 / 14
✓
Work surfaces — disinfectant, 4 min
✓
Anteroom & gowning zone
Low return grilles
Product, dilution, contact time, zone, technician, timestamp. Recorded as it happens — and nothing with a camera enters your classified space.
#3
A direct line
#cleanroom-ops · today
Facility leadScuff by the airlock threshold 09:12
Tech 04Approved detergent, non-abrasive pad 09:14
Tech 04Cleared — logged against the SOP 09:41
A named project manager who knows your room. No general inbox, no chasing.
#4
Coverage that holds
Coverage tonight2 active
Tech 04 — cleanroomOn site
Tech 11 — reliefTrained, on call
Entry protocolVerified
A substitute trained on your protocol — not whoever was free that night.
#5
Scored inspection
Monthly inspectionPassed
Classified space98
Anteroom97
Gowning91
Scored by zone, walked with your team. Trends visible before they become findings.
#6
Issues tracked to closure
Active issues1 open
Door seal wear — flaggedReported
Residue at thresholdResolved
Grille build-upResolved
We flag wear before it's your problem — raised, tracked, closed, with proof.
See it on your cleanroom →
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Who this is for

Every kind of controlled environment.

Different classifications, different industries, different rules — the procedure is built to yours.

01

First-time cleanroom operators

The room is built, the manual says the methodology is yours, and nobody in-house has written one. The most common call we take.

02

Photonics, lasers & semiconductor

Particle-sensitive assembly and packaging environments where the enemy is contamination, not pathogens.

03

Medical device manufacturing

Controlled assembly and packaging spaces with documented procedures and audit exposure.

04

Pharma & compounding

Regulated environments where an existing SOP already governs and must be followed exactly as written.

05

Biotech & research labs

Classified and semi-classified space alongside general laboratory areas, each with its own rules.

06

Rooms still being commissioned

Not running yet. Construction residue, packaging debris and boot scuff — a distinct scope, done to the same constraints.

Cleanroom and controlled-environment cleaning across Greater Montreal — to your classification and your written protocols, never to a certification we don't hold.

CNESST-compliant
$5M liability
Insured crews
Bilingual teams
Confidentiality agreement
They ask, we answer

Cleanroom cleaning SOP questions.

What is a cleanroom cleaning SOP?
A cleanroom cleaning SOP is the written standard operating procedure that governs how your cleanroom is cleaned. At minimum it defines four things: the detailed steps of the cleaning process, the products used and their exact concentration, the required contact time for each product, and the cleaning frequency. Cleanroom manufacturers generally require the operator to have one, and treat cleaning method as the operator's responsibility rather than theirs.
Who is responsible for writing the cleaning SOP — us or the cleanroom manufacturer?
The operator, in almost every case. Cleanroom manufacturers supply maintenance guidelines and a list of products compatible with their surfaces, but they typically state plainly that developing and applying a cleaning methodology appropriate to your industry is the client's responsibility, and that they cannot be held responsible for the methods you implement. That leaves a gap most first-time operators don't expect — which is the gap we fill.
What are the four things a cleanroom cleaning SOP must contain?
(1) Detailed steps — the full sequence, zone by zone. (2) Products and exact concentration — not "a disinfectant" but the specific agent at a specific dilution. (3) Required contact time — how long each product must stay wet on the surface to work, and when it must be removed. (4) Frequency — how often each task is performed, which varies by ISO class and by what you do in the room.
Can the wrong cleaning products damage a cleanroom or affect the warranty?
Yes, on both counts. Manufacturer maintenance guidelines exist specifically to protect the lifespan, appearance and conformity of the room — and warranty conditions are commonly tied to following them. Using a product outside the approved list, or an approved product at the wrong concentration, can cause premature wear or oxidation of panels, seals and hardware. Oxidising and phenolic agents in particular require care. The rule we work to: if it isn't on your manufacturer's approved list at the approved dilution, it doesn't touch the surface until they've approved it in writing.
How often should a cleanroom be cleaned?
It depends on your ISO classification, what you do in the room, and your environmental monitoring results — which is why frequency is one of the four elements the SOP has to define rather than a number anyone can quote blind. As a general shape: work surfaces and high-touch points get a daily disinfectant, a sporicide runs on a defined rotation driven by your monitoring data, and a detergent step is used periodically to clear residue after maintenance. We set your actual frequencies at the walkthrough.
What does a typical disinfection rotation look like?
A conventional programme runs three agents in rotation: a disinfectant applied to work surfaces on a routine basis, a sporicide used at intervals informed by environmental monitoring, and a cleaner or detergent applied periodically where residue has built up after maintenance work. Each step is normally followed by a rinse — commonly isopropyl alcohol or high-purity water — to remove residue before it dries.
Why does contact time matter so much?
Because a disinfectant that dries before its contact time has elapsed hasn't disinfected anything, and one left far beyond it can attack the surface. Both failures look identical on a checklist — the surface was wiped either way. Contact time is the single most commonly broken element of a cleaning SOP, and it's the reason we record tasks as they're performed rather than at the end of a shift.
Do you follow our SOP, or do you write one?
Either. If you already have an SOP — because you're in a regulated industry or your quality team has written one — we work to it exactly, and it gets configured into the task list at onboarding. If you don't have one yet, which is common for a first cleanroom, we build it with you from your manufacturer's guidelines, your classification, and what happens in the room. Then we execute it and document it.
How do we prove the SOP was actually followed?
With an execution record, not photographs. We don't bring cameras or phones into a classified space — they're a particle source, and in most controlled environments they're prohibited outright. Instead each task is logged in Spotlight as it is completed: the zone, the product and dilution used, the contact time observed, the technician, and the timestamp. When your quality team or a client asks whether the procedure was followed on a given date, that log is the answer.
Do you verify how clean the room actually is?
That depends on your industry and on what your quality system already does. Room classification is verified by your environmental monitoring programme — particle counts against your ISO class, and where relevant microbial sampling — and that normally sits with you or a qualified third party, not with your cleaning contractor. What we're accountable for is that the procedure was executed correctly and recorded. Where a client wants an independent cleaning-efficacy check on defined touchpoints, we can discuss adding surface verification to the scope.
Can you clean a cleanroom that is still being commissioned?
Yes — and that's often the first job. A room handed over from construction carries drywall dust, packaging residue and rubber scuff from boots that ordinary cleaning won't lift and abrasives aren't permitted to attack. Post-construction cleanroom cleaning is a distinct scope from recurring maintenance, done to the same approved-product constraints. If your room isn't running yet, this is the conversation to have now rather than after.
Do your crews gown before entering?
Yes, to your entry protocol — gowning, footwear, materials transfer and the order of operations through your airlock or anteroom. Gowning discipline is part of the SOP, not separate from it, and the gowning area itself is a cleaning zone with its own requirements that general contractors routinely miss.
Are you ISO certified?
No, and you should be sceptical of any cleaning company that claims to be — ISO 14644 classifies cleanrooms, not the contractors who clean them. What we do is clean to your classification and your written protocols, with approved products at approved concentrations and contact times, documented every visit. We're insured, CNESST-compliant, carry $5M liability, and every engagement is backed by a confidentiality agreement.

Room going live soon? Start the procedure now.

The easiest time to get the cleaning procedure right is before the room is running. Book a free walkthrough — we'll look at your classification, your manufacturer's guidelines and what you'll be doing in the room, and come back within 24 hours with a scope and a quote.

Get a free quote in 24 h →

Or call us: (514) 504-2325

Part of our cleanroom cleaning practice. Frequency is one of the four elements your procedure must define — see how often a cleanroom should be cleaned. Also read: facility privacy and confidentiality — how we handle access, photography and non-disclosure in sensitive facilities. We clean manufacturing and clinical environments across Greater Montreal. See full commercial cleaning pricing.