Despite sharing the same purpose, to protect your building, commercial flat roofs share very little in common with their residential roof counterparts. To begin with, residential roofs are pitched to allow for water runoff.


Generally speaking, the function and needs of flat roofs are much different from those of a pitched residential roof. For example, with a commercial roof, you may have many more reasons to make the roof accessible, such as for safety code purposes or for maintenance of the building. Like residential roofs, however, there are several main reasons a commercial flat roof might be leaking.


If your commercial roof is leaking, it is a problem worth addressing right away. Leaks can lead to more extensive water damage over time, so even a small amount of damage isn’t good to ignore.


If you do have a leak problem on your flat roof, don’t worry. Our roofing contractors are ready to assist you. We even offer advanced technologies. So, when a rubber membrane springs a leak, the flat roof repair pros at A-Plus Roofing use infrared technology to locate the source of the problem and make a complete repair.


In this blog entry, our team shares some of the top reasons behind a commercial flat roof leak and talks about what we can do to help. Here are a few main causes of leaks we see during roof inspections.

Overlooked Maintenance

A well-maintained flat roof is incredibly durable and capable of standing up to the test of time. But when regular maintenance is overlooked on a commercial roof, you can expect to see problems that will compound over time. Wind, snow, ice, and rain can cause a roof’s protective gravel layer to shift around. Additionally, minor damage can become significant when strong storms or weather come along.

Natural Elements

Rain, storms, hail, and temperature extremes are all common here in the Midwest. In addition to the damage caused by freeze and thaw cycles, debris like tree limbs and rocks can impact your roof and cause trouble. In many cases, this type of damage will be covered by the company’s insurance. In some instances, a roof may need to be completely replaced.

Sealant Problems

Both residential homes and commercial facilities require chimneys and exhaust pipes to allow the release of gas from their heating and plumbing systems. Unfortunately, these spots represent a break in the roof membrane, creating a potential vulnerability.


The seals around them will require updating and replacing eventually. That’s why it’s important to inspect exhaust vents for pipe sealant problems on an annual basis.

End of Lifespan

Even with routine maintenance and upkeep, most roofing materials will wear down with time. While the length of the rooftops' lifespan varies, most need to be replaced every 20-50 years. As the materials grow weaker, they're less resistant to the elements and could spring a leak. If you are unsure how old your roof is, A-Plus Roofing can help.

Water Accumulates Easily

Since flat roofs don't slope, rainwater can become trapped. Of course, this shouldn't be a problem with a well-installed commercial flat roof. However, it's possible that the original installation was lacking and not secure.


Without a proper drainage system, water may build up. If you ever see signs of water damage, such as spots on the ceiling, contact a roofing contractor immediately for a roof inspection.

Contact Your Twin Cities Commercial Roofing Contractor

If your commercial roof shows signs of damage like water leaks, remember that putting off repairs can lead to more serious problems down the road. Act now to avoid mold, mildew, leaks, and other significant problems. To keep your roof in prime shape, be sure to schedule annual inspections and keep up with any maintenance that needs to be addressed.


At A-Plus Roofing, we service Twin Cities TPO membranes, Duro-Last roofs, and EPDM rubber membranes. To connect with your flat roofing repair team, call us at 952-894-5435. Or contact us online to learn more about our services.