Commercial Window Washing for Montreal Office Buildings
How often should commercial windows be cleaned on an office building in Montreal?
The honest answer is that it depends on the building, but we can give you a useful starting point. For most mid-rise office buildings in Montreal, exterior window cleaning happens two to four times a year. A common approach is twice annually, once in late spring after the winter grime has settled, and once in early fall before the weather turns. Buildings with heavy street-level traffic, proximity to a highway, or a lot of ground-floor retail often benefit from more frequent attention.
What most people underestimate is how fast Montreal’s seasons degrade glass. After a winter with road salt spray, diesel exhaust, and freeze-thaw cycles, exterior glass on a ground-floor storefront or lobby window can look decades older than it actually is by the time March arrives. Interior glass in lobbies and common areas tends to collect fingerprints, smudges, and condensation marks at a steadier pace, so many buildings schedule interior window cleaning more frequently, sometimes on a monthly or quarterly basis depending on the scope of work.
High-rise buildings with rope access or swing stage work are a different calculation entirely. The logistics and cost push most owners toward an annual or semi-annual schedule, with spot cleaning at accessible levels in between.
What is the best time of year to schedule exterior window washing in Quebec?
For exterior work on a Quebec building, May and June are the most practical window. The snow is gone, temperatures are consistently above freezing, and you get a clean baseline heading into summer when buildings see the most visitors and tenant foot traffic. That timing also means you are not fighting the freeze-thaw problem that makes exterior washing in March or April a short-lived effort. You wash in April, it snows two days later, and you are back to square one.
Early September is the second best slot. You catch the glass before the heating season starts pushing condensation onto interior surfaces and before the leaves and October rain start adding debris. Scheduling in late August or early September also tends to mean better crew availability than the peak summer rush.
We are in that May-to-June window right now, which is why this question comes up a lot this time of year. If you have not booked exterior window washing for your building yet, you are still in the best part of the season for it.
What does a professional commercial window cleaning service include?
This varies by contractor and scope, so the right move is to confirm it in writing before the work starts. A solid scope of work covers the glass itself, the frames, the sills, and ideally the tracks on operable windows. Leaving the frames and sills dirty while cleaning the glass is a bit like mopping a floor without touching the baseboards. The glass looks clean for about a week before the dirty frame starts winning the argument.
For multi-storey buildings, the scope should also spell out which floors are included, whether interior and exterior are both covered, and how ground-floor entrance glass is handled. Entrance glass often needs to be included in the regular janitorial scope as well, not just the periodic window washing cycle, because it gets touched constantly.
Post-construction window cleaning is its own category. Construction debris, adhesive residue, paint overspray, and silicone smears do not come off with standard window cleaning methods. If you are finishing a renovation, make sure that is spelled out separately in the scope of work, because it requires different techniques and more time.
How do property managers coordinate window washing without disrupting tenants or blocking the parking lot?
Communication ahead of time is most of the answer. Tenants do not mind window washing crews on lifts outside their windows as long as they knew it was coming. What they do mind is an unannounced crew appearing outside a boardroom during a client presentation at nine in the morning.
A reasonable notice window for most office tenants is five to seven business days. Email the notice to the property contacts for each unit, include the date and approximate time range, and mention if there will be any restriction on opening windows that day. For exterior work involving boom lifts or scissor lifts, you also need to coordinate with parking management in advance. Blocked stalls without notice generate complaints fast. Mark off the equipment footprint early, and if you can do it during lower-traffic hours, a Tuesday morning is a lot smoother than a Monday morning or a Friday afternoon.
For larger buildings with loading docks or underground garage access, confirm with your window washing contractor whether their equipment needs a specific clearance height. A boom lift that can’t get into your parking structure is a scheduling problem that shows up on the day of the job if no one asked the question ahead of time.
What should be in a window cleaning contract or scope of work for a commercial building?
A scope of work for commercial window washing should cover a few specifics that often get left vague. Which surfaces are included, glass only or frames and sills as well. Interior, exterior, or both. How many floors, and how ground-level entrance glass is handled relative to the rest of the building. The frequency of service and what triggers an additional visit, construction work nearby, a particularly bad winter, a building renovation.
It should also state how the work is accessed. Scissor lift, boom lift, rope access, water-fed pole from the ground. This matters because the access method affects which surfaces can be reached, what restrictions apply on the site, and what equipment will be in your parking lot or on your roof.
Insurance confirmation is not optional. Any contractor doing elevated work on your building should carry the coverage appropriate for that work, and you should have it in writing before the crew arrives. Ask for it as a standard part of the quote process.
Finally, specify what happens if weather delays the job. Window washing is weather-dependent, and a good contract acknowledges that with a clear rescheduling process so no one is left guessing.
Over more than six decades of cleaning commercial buildings across Greater Montreal, we have seen what a well-written scope of work prevents. Disputes over what was included, missed surfaces, surprise charges. The specifics matter. A one-page scope that everyone has signed off on saves a lot of back-and-forth later.
At Can-Jan Inc., we have kept Montreal buildings clean since 1961. Reach out to talk about your property.
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