Commercial roofing
Commercial roofing for commercial and industrial buildings in Burlington.
Commercial and Industrial Flat Roofing in Burlington
Burlington's flex office-industrial units combine a warm office end and a cold warehouse end under one continuous roof, and the roof feels the difference.
NorthCan Roofing maintains, repairs and replaces flat roofs on Burlington's commercial and industrial buildings, concentrated in the QEW-corridor business parks. The dominant building here is the flex unit, part office and part warehouse under one roof, and its mixed internal conditions drive most of the roofing problems we are called to.
What does Burlington's business park stock look like?
Burlington's employment land sits mainly north of the QEW, in the corridor running from Appleby and Harvester through the North Service Road area and up towards Mainway and Corporate Drive. The characteristic building is the flex or office-industrial unit: a low-rise structure with a finished office frontage of one or two storeys, a warehouse or light manufacturing area behind, and a single continuous low-slope roof over both.
Most of this stock dates from the 1980s through the 2000s. Roofs are steel deck on joists, with modified bitumen on the earlier buildings and mechanically attached single-ply on the later ones. Roof areas are moderate rather than vast, and the buildings are frequently subdivided into small tenancies, so a single roof may cover four or five occupiers.
The technical quirk of the flex format is the boundary. The office end is heated and humidified to comfort conditions; the warehouse end may be heated to a few degrees above freezing or barely at all. The roof assembly crosses that boundary continuously. Where the vapour retarder is discontinuous or the insulation thickness was never adjusted for the difference, condensation forms inside the assembly on the warm side, and owners report a leak on a day when it has not rained.
Why is freeze-thaw such a factor along the Burlington lakeshore?
Because Lake Ontario keeps the immediate lakeshore hovering near the freezing point instead of holding a steady deep freeze. The result is many more cycles across zero across a winter than an inland site sees. Every cycle expands water that has found its way into a lap, a crack in a coping joint or a masonry parapet, and every cycle opens that path a little further. Freeze-thaw damage is cumulative and it concentrates in the details rather than the field.
The visible outcomes on Burlington roofs are spalling and open joints in parapet masonry and coping, split base flashings at roof-to-wall junctions, ice building at scuppers and internal drains, and failure of sealant-dependent details that were never meant to be the primary barrier. The Ontario Building Code lists climatic design data for each municipality in Supplementary Standard SB-1, and Burlington's lakeshore values reflect its moderated position. The design implication is that detailing durability, not snow load, is the main climatic risk to a Burlington roof.
Our Burlington service mix
Detail work and moisture diagnosis lead, with replacement following where the assembly has taken on water.
- Vapour retarder and condensation diagnosis on flex units where the office and warehouse conditions differ.
- Flashing, coping and parapet rebuilds where freeze-thaw has opened the details.
- Drain and scupper upgrades to move meltwater off before it refreezes.
- Flat roof replacement with a properly continuous vapour retarder and insulation appropriate to each zone.
- Maintenance scheduled in autumn, before the cycling season begins.
Where an owner is planning capital works across several units, the flat roof cost calculator gives a defensible starting figure, and our commercial roofing page explains how we scope and phase the work.
How Burlington jobs are staffed
From 425 Alness Street in Toronto. There is no Burlington office, no local yard and no Burlington phone number; every enquiry comes to 416-456-0777. The QEW run west is a long one during peak periods, so we schedule Burlington work as full days with the crew and materials committed for the duration, and we combine trips with our Oakville and Hamilton work along the same corridor wherever the schedule permits.
This is why we are candid with Burlington clients that planned maintenance serves them better than a reactive relationship. Diagnosing a condensation problem or a parapet failure properly needs time on the roof, not a rushed callout. Genuine water ingress still goes through the 24/7 line to emergency roof repairs, and the wider map is on the service areas page.
Building permits for Burlington roof work
The City of Burlington states that all construction projects related to a building or structure require a building permit under the Building Code Act except in specific cases, and its published exemptions include replacing shingles with the same material as long as the roof has fewer than three layers of shingles. That exemption is written for pitched residential roofs; for a commercial low-slope assembly the question to put to the City is whether your scope involves structural work or a change to the building's structure or use.
On Burlington flex units, the scopes that most often cross into permit territory are deck replacement where corrosion has been found, adding or relocating rooftop mechanical equipment, and cutting new roof openings. Check the City's do I need a building permit page and confirm with Burlington's building department before scheduling. Site plan conditions on rooftop equipment screening are also common in the newer business parks.
Why does our roof leak when it has not rained?
Usually because it is not a leak. In a flex building, warm humid air from the office end migrates into the roof assembly, meets a cold surface such as the underside of the deck or a steel fastener, and condenses. The water then drips exactly like a leak, but it appears on cold clear days rather than during rain, it often shows in a grid pattern that matches the fasteners, and it can be worse in the warehouse portion where the vapour retarder was assumed to be unnecessary.
Diagnosing it requires looking at the whole assembly rather than the membrane: where the vapour retarder is, whether it is continuous across the office and warehouse zones, whether the insulation thickness keeps the condensing surface warm enough, and what the actual interior humidity is. Fixing it means correcting the assembly, sometimes with additional insulation above the deck and a properly detailed vapour control layer, which is a replacement conversation rather than a patch.
What we do in Burlington
Flat roof repairs
Flat roof repairs for commercial and industrial buildings in Burlington.
Emergency roof repairs
Emergency roof repairs for commercial and industrial buildings in Burlington.
Flat roof replacement
Flat roof replacement for commercial and industrial buildings in Burlington.
Roof installation & replacement
Roof installation & replacement for commercial and industrial buildings in Burlington.
Roof inspections
Roof inspections for commercial and industrial buildings in Burlington.
Roofing in Burlington — questions we get asked
Our Burlington unit shows drips on cold dry days. Is the roof leaking?
Probably not in the ordinary sense. Warm humid air from the office end of a flex building migrates into the assembly, condenses on cold steel deck or fasteners, and drips. Tell-tales are drips in cold clear weather rather than rain, and a pattern matching the fastener grid. The remedy is correcting the vapour retarder and insulation, not patching the membrane.
Why does freeze-thaw matter more here than further inland?
Because the lakeshore hovers around freezing rather than staying frozen, so Burlington sees many more crossings of zero in a winter. Each cycle expands water sitting in a coping joint, a lap or a masonry parapet and enlarges the path. The damage accumulates in details rather than in the open field, which is where we concentrate inspection and repair effort.
Do we need a Burlington permit to replace our commercial flat roof?
The City says all construction related to a building requires a permit except in specific listed cases, and its shingle exemption is written for pitched roofs. For a commercial low-slope roof, the deciding question is whether your scope includes structural work such as deck replacement, new openings or new rooftop equipment. Confirm your specific scope with Burlington's building department.
Can our four tenants stay in during a re-roof of a Burlington flex unit?
Generally yes. Roof areas here are moderate, so we can work in sections that are opened and closed within a shift. The two things to manage are odour and noise over the finished office end, which we schedule around meetings and tenant hours, and protection over any warehouse racking. Access is usually straightforward from the yard rather than needing a crane.
Free roof assessment in Burlington
Tell us the address, the roof size and what you are seeing. We will book a time to get up there and put it in writing.
Call 416-456-0777 for anything urgent. Our emergency line is answered around the clock.
Call 416-456-0777