For many commercial and industrial buildings in London, Ontario, flat roofing systems are the standard. They’re practical, efficient, and cost-effective, but they also require a different approach to maintenance than traditional sloped roofs.
The reality is, most major roofing problems don’t start as emergencies. They begin as small, manageable issues that go unnoticed over time.
For property managers and building owners, having a clear maintenance plan in place from a commercial roofing company in London, Ontario, can make the difference between a minor repair and a significant capital expense.
This guide breaks down what you need to know to protect your investment and extend the life of your commercial flat roof.
Understanding Common Commercial Roofing in London, Ontario
Not all flat roofs are built the same. The materials used will influence how your roof performs and how it should be maintained.
TPO (Thermoplastic Polyolefin)
TPO is a single-ply membrane commonly used on commercial buildings in London, Ontario. It is known for its energy efficiency and reflective properties.
Maintenance considerations:
- Seams should be inspected regularly for separation
- Membrane punctures can occur from rooftop traffic or equipment
- Flashings around penetrations need to remain properly sealed
TPO systems perform well when maintained, but small seam or flashing issues can lead to leaks if ignored.
EPDM (Ethylene Propylene Diene Monomer)
EPDM is a durable rubber membrane often seen on low-slope commercial roofs. It is flexible and performs well in varying temperatures.
Maintenance considerations:
- Seams and adhesive areas should be checked for wear
- Shrinkage over time can affect edges and flashing details
- Punctures from tools or debris are common and should be addressed quickly
EPDM roofs tend to age well, but like all systems, they benefit from routine inspections.
BUR (Built-Up Roofing)
Built-up roofing systems consist of multiple layers of asphalt and reinforcing materials. These are often found on older commercial or industrial buildings.
Maintenance considerations:
- Surface cracking or blistering can develop over time
- Drainage is critical to prevent water buildup
- Protective coatings may need to be reapplied
BUR systems are known for durability, but they require consistent upkeep to prevent long-term deterioration.
Common Flat Roof Issues in London, Ontario
Flat roofs don’t shed water the same way sloped roofs do, which makes regular monitoring especially important.
Ponding Water
Standing water that remains on the roof for more than 48 hours is a sign of drainage issues.
Over time, ponding water can:
- Add structural stress
- Accelerate membrane wear
- Lead to leaks at seams and penetrations
Addressing drainage early can prevent more serious problems down the line.
Blistering and Surface Damage
Blisters or bubbles in the membrane are often caused by trapped moisture or air.
While not always an immediate concern, they can:
- Weaken the membrane
- Lead to cracks or splits
- Increase the risk of leaks
Monitoring and addressing these areas early helps maintain the integrity of the system.
Flashing and Seal Failures
Flashing protects vulnerable areas such as:
- Roof edges
- HVAC units
- Vents and penetrations
When flashing or sealants fail, water can enter quickly and cause interior damage.
These are some of the most common sources of leaks and are often preventable with regular inspections.
Debris and Blocked Drains
Leaves, dirt, and debris can collect on flat roofs, especially after fall and winter.
Blocked drains and eavestroughs can lead to:
- Water buildup
- Overflow into the building
- Ice formation during colder months
Keeping these areas clear is one of the simplest and most effective maintenance steps.
Why Preventative Maintenance with a Commercial Roofing Company Matters
Many commercial roof failures are not due to age alone—they are the result of small issues being left unaddressed.
A proactive maintenance approach helps:
- Extend the lifespan of your roof
- Reduce the likelihood of unexpected repairs
- Protect interior assets and operations
- Provide better long-term cost control
For building owners and property managers, this means fewer disruptions and more predictable budgeting.
The ROI of a Roof Maintenance Program
One of the most effective ways to manage your commercial roof is through a structured maintenance program.
At Courtney Roofing, our RoofCheck® program is designed to take a proactive approach to roof care.
Rather than reacting to problems after they occur, we focus on identifying and addressing issues early.
What this means for your business:
- Regular inspections scheduled at optimal times of year
- Minor repairs handled before they escalate
- Detailed assessments of your roof’s condition
- Peace of mind knowing your roof is being monitored
Cost vs. Value
It’s easy to delay maintenance when everything appears to be functioning properly.
However:
- A small repair today can prevent a much larger expense later
- Emergency repairs often come with higher costs and operational disruption
- Water damage inside a building can impact inventory, equipment, and tenant satisfaction
Preventative maintenance is not just about the roof—it’s about protecting your entire property.
When Should You Schedule a Roof Inspection?
For commercial buildings in London, Ontario, the best times are:
- Early spring to assess any winter damage
- Late fall to prepare for snow and freezing temperatures
Additional inspections are recommended after:
- Severe storms
- High winds
- Heavy snowfall
A Smarter Approach to Roof Management
Managing a commercial property comes with a long list of responsibilities. Your roof is one of the most critical components, yet it’s often out of sight and out of mind until something goes wrong.
Taking a proactive approach helps ensure that small issues are handled early and that your roof continues to perform as expected.
Contact Us for Commercial Roofing Maintenance in London, Ontario
Flat roofs are built to last—but only when they are properly maintained.
Understanding your roofing system, staying ahead of common issues, and investing in regular inspections can significantly extend the life of your roof and reduce long-term costs.
If you’re looking for commercial roof maintenance in London, Ontario, a structured program like RoofCheck®can help provide the consistency and oversight needed to protect your investment.