Commercial roofing
Commercial roofing for commercial and industrial buildings in Mississauga.
Commercial and Industrial Flat Roofing in Mississauga
Airport Corporate Centre offices and the Meadowvale and Northeast warehouse belt give Mississauga some of the largest single roof areas in the region.
NorthCan Roofing installs, replaces and repairs flat and low-slope roofs on Mississauga's commercial and industrial buildings. The work here is dominated by scale: single warehouse roofs measured in tens of thousands of square metres, and office roofs near the airport that sit fully exposed to wind with nothing upwind to slow it.
What is the dominant roof stock in Mississauga?
Two families, and they behave very differently. The first is the office and flex stock in and around Airport Corporate Centre, east of Pearson between Eglinton and Eastgate: mostly 1980s and 1990s low-rise and mid-rise buildings on concrete or steel deck, originally roofed in built-up or early modified bitumen, and now mostly on their second membrane. Roof areas are moderate but the rooftops are crowded with mechanical equipment, screens and satellite dishes, which means a lot of flashing per square metre.
The second is the distribution and manufacturing belt: Meadowvale and Meadowvale Business Park in the northwest, the Northeast employment area around Dixie and Britannia, and the Gateway and Airport corporate lands. These are long-span steel deck warehouses, many built from the 1990s onward, roofed in mechanically attached TPO or EPDM, with vast uninterrupted field areas, few penetrations and a very high proportion of the risk concentrated in the perimeter and corner zones and at the seams.
On the newer stock the deciding factor for us is fastener pattern and seam integrity rather than membrane age. A twenty-year-old mechanically attached single-ply roof with sound seams may have another cycle in it; the same roof with backed-out fasteners and fluttering field sheets does not.
Why does wind uplift matter more on a Mississauga industrial roof?
Because these roofs are big, low and exposed. A warehouse roof in Meadowvale or the Northeast lands presents a large flat plane with open land or low buildings upwind, and the airport lands in particular have very little to break the wind. Wind flowing over a low-slope roof creates suction, and that suction is strongest at the corners, then along the perimeter, then lowest in the field. Roofing systems are designed and tested for zoned uplift resistance for exactly that reason, and the Ontario Building Code references wind pressures by municipality in its climatic design data, Supplementary Standard SB-1.
When a large single-ply roof fails in wind, it usually starts at a corner: an edge metal fastening lets go, wind gets under the membrane, and the sheet peels progressively inward. That is why we spend disproportionate effort on the edge condition. Continuous cleat, correct fastener spacing at the perimeter and corner zones, tightened seam welds and proper termination at the parapet are the difference between a roof that shrugs off a windstorm and one that unzips. On a re-roof we check the existing edge metal detail before pricing anything, because upgrading it is often the single most useful change to the assembly.
What we do across Mississauga's business parks
The bulk of our Mississauga work is large-area replacement and planned maintenance, plus edge and seam remediation on single-ply roofs that are not yet due for replacement.
- Industrial roofing on distribution centres, cold storage and manufacturing buildings.
- Large-area flat roof replacement in mechanically attached or induction-welded TPO and PVC.
- Edge metal, coping and flashing upgrades at perimeter and corner zones.
- Scheduled inspection with seam probing and fastener pull testing on ageing single-ply.
- Repairs at curbs, drains and mechanical penetrations on Airport Corporate Centre offices.
On very large roofs, area drives the number more than anything else, and the flat roof cost calculator will give you a defensible planning figure before we measure the building properly.
Getting crews to Mississauga
Everything runs from 425 Alness Street in Toronto. We do not keep a Mississauga office, yard or local number, and any Mississauga job you book reaches us on 416-456-0777. The route is Highway 401 or 407 westbound, which is straightforward outside peak periods and slower inside them. On large Mississauga replacements we plan around that by working longer days with a bigger crew rather than more short days, and by staging material on the roof so that the crew is not waiting on deliveries that have to cross the region.
Water entering a distribution centre is an inventory problem within the hour, so the 24/7 line and emergency roof repairs matter more here than on a low-occupancy building. Our neighbouring coverage runs west to Oakville and north to Brampton, with everything else on the service areas page.
Mississauga's permit path for roof work
The City of Mississauga publishes a plain list of what needs a permit. Re-shingling a roof is listed as not requiring one, while roof extensions or alterations that increase the height or change the slope do require a permit, and so do rooftop HVAC replacements. That last item is the one that catches Mississauga owners most often, because on a business park roof a membrane replacement is frequently bundled with swapping out tired rooftop units, and the mechanical side of that scope has its own approval.
Read the City's when a building permit is required page and confirm your particular scope with Mississauga's Building division. Also check whether your property is under site plan control or in a business park with architectural controls, since screening, edge metal colour and equipment visibility can be conditions of the original approval. Our general commercial scope is set out on the commercial roofing page.
Can a warehouse roof be replaced while the building keeps operating?
Yes, and on Mississauga distribution buildings it usually has to be. The method is to divide the roof into sections that can be opened and closed within a single shift, work away from live dock doors and sprinkler mains, and protect the racking below with a continuous barrier. Tear-off debris is chuted to bins positioned where trucks are not turning, and the crew phases so that no section of deck is left exposed to an overnight forecast.
The bigger risk in an operating warehouse is not rain but dust and fastener drop. Anything that falls through an open deck flute lands on product. We keep magnetic sweeps and deck protection in the sequence, and we agree the exclusion zone with the tenant's operations lead before the first sheet comes off.
What we do in Mississauga
Flat roof repairs
Flat roof repairs for commercial and industrial buildings in Mississauga.
Emergency roof repairs
Emergency roof repairs for commercial and industrial buildings in Mississauga.
Flat roof replacement
Flat roof replacement for commercial and industrial buildings in Mississauga.
Roof installation & replacement
Roof installation & replacement for commercial and industrial buildings in Mississauga.
Roof inspections
Roof inspections for commercial and industrial buildings in Mississauga.
Roofing in Mississauga — questions we get asked
Why do you inspect the roof edge before quoting a Mississauga warehouse?
Because wind uplift on a large exposed roof concentrates at the corners and perimeter, and most single-ply failures start when edge metal releases and lets wind under the membrane. The existing edge detail, its fastener spacing and the condition of the wood nailer tell us whether the new system can simply be tied into it or whether the perimeter needs rebuilding. It changes the price and the risk.
Does replacing rooftop units at the same time as the roof need a permit in Mississauga?
The City lists rooftop HVAC replacements among the projects that require a building permit, while re-roofing itself is treated as exempt. Since Mississauga business park owners often bundle both scopes into one shutdown, plan the mechanical approval early. Confirm the current position with Mississauga's Building division for your address before you set the schedule.
Our Airport Corporate Centre roof leaks around the mechanical units, not in the field. Is that normal?
Very. Office roofs in that area carry a high density of units, screens and dish mounts on curbs that are often older than the current membrane. Curb flashing, pitch pockets and the sheet metal caps fail well before the field membrane does. On a crowded roof it is common to rebuild every curb and leave a sound field, which is a far smaller job than a replacement.
How do you keep a Meadowvale distribution centre running during a re-roof?
We divide the roof into sections small enough to open and close within one shift, keep the work away from active dock doors and sprinkler mains, protect the racking below, and position debris chutes clear of truck movement. Fastener and debris control matters more than most tenants expect, because anything dropped through an open deck flute lands on stored product.
Free roof assessment in Mississauga
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