Running a commercial property in Southern Ontario comes with exterior maintenance demands that are a different scale from residential work, more surface area, more foot traffic, harder grime, and a lot more eyes on the building every day. Whether you manage a strip mall in London's south end, an industrial facility in St. Thomas, or a multi-unit residential building in Strathroy, the exterior of that property is making an impression before anyone walks through the door.
The problem we hear from property managers most often isn't that they don't care about maintenance, it's that it keeps getting pushed down the list until something actually fails. That's the expensive way to do it.
What Southern Ontario's Climate Does to Commercial Exteriors
London and the surrounding area sits in one of Canada's more aggressive climate zones for exterior surfaces. You get genuine freeze-thaw cycles most winters, not just cold, but repeated expansion and contraction that works its way into any crack, joint, or coating. Add to that the spring runoff, summer humidity, and the agricultural dust and pollen that rolls in from Middlesex and Elgin County, and commercial surfaces accumulate grime at a rate most building owners underestimate.
Concrete and masonry, loading docks, walkways, parking structures, get oil, rubber, and road salt ground in through every season. Siding picks up biological growth (algae, mould, mildew) faster on north-facing walls where sun doesn't reach. Metal cladding oxidizes. BOMA Canada's property management guidelines flag exterior cleaning as one of the highest-return preventive maintenance tasks for commercial buildings, primarily because grime and biological growth accelerate surface degradation, turning a $500 annual cleaning into a $5,000+ surface restoration every five years.
A Realistic Commercial Maintenance Calendar
The properties we maintain regularly across London, Ingersoll, and St. Thomas generally follow a similar pattern. This isn't a rigid formula, every property is different, but it gives you a useful starting point:
- Spring (April and May). Full exterior wash of siding, storefronts, and canopies. Gutter clean. Parking lot and walkway pressure wash to remove road salt and winter grime. This is also the right time to inspect caulking around windows and doors — Southern Ontario's freeze-thaw cycle pulls those joints apart over winter.
- Mid-Summer (July). Spot treatment for algae and mould on north-facing walls and shaded areas. Grease and oil removal from loading areas and dumpster pads if applicable.
- Fall (October and November). Gutter clean before freeze-up. Eavestrough inspection on flat-roof sections common to commercial builds — standing water on a commercial roof is a serious liability. Final surface wash before salt season starts.
Property Standards and Liability in London
The City of London Property Standards By-law requires commercial properties to maintain exterior surfaces in a clean, structurally sound condition. Mould growth on facades, failing caulking, blocked drainage, and deteriorating siding can all generate bylaw orders, which come with remediation deadlines and reinspection fees. More importantly, if a customer slips on algae-covered walkway or is injured near a failing fascia, the maintenance record of the property becomes relevant in any liability claim.
We work with property managers across Middlesex, Elgin, and Oxford County on scheduled commercial contracts. The advantage of a recurring contract versus one-off calls is that problems get caught early, a fascia board that's softening, a downspout that's pulling away, caulking that's cracking, before they require significant repair. It also means you have documentation of regular maintenance, which matters for both insurance and bylaw compliance.
We're fully WSIB covered and carry commercial-grade liability insurance. If you're a property manager looking for a maintenance partner in London, St. Thomas, Strathroy, or anywhere in Southern Ontario, take a look at our commercial services page or call us directly to talk through what your property actually needs.