Commercial roof leaks can cause a lot of problems. Of course, the obvious issue with a commercial roof leak is that water may damage your inventory or equipment. But on another level, a leaking commercial roof may cause your customers and employees to become concerned about your organization. After all, a building with a leaky roof may be hiding mold within the walls or ceiling. And, if clients and customers visit your establishment, a roof leak may cause them to question your standards.

5 Common Causes of a Leaky Commercial Roof

So, if you have a commercial roof leak, take care of it immediately. Chances are, you won’t have to replace your building’s roof. Here are some of the most common causes of a commercial roof leak, and a commercial roofing contractor can quickly fix most.

Improper drainage

One of the most common causes of commercial roof leaks is improper drainage. In some cases, the building’s drainage system may have been improperly designed. But more than likely, the drains, gutters, downspouts, and scuppers may need to be repaired or cleaned to ensure that water can easily drain off the roof.

Standing water on your roof can cause leaks to form. Of course, this water also adds extra weight for your building’s structure to support.

Open Roof Penetrations

The seals around vents, drains, pipes, gas lines, HVAC units, and electrical conduit on your roof may break down, resulting in areas vulnerable to leaks. This could be caused by improper sealing, but more than likely, the open penetrations result from harsh weather and time.

Damaged Roof Flashings

Another issue that is common in commercial roof repair is damaged roof flashing. Flashing describes the metal pieces installed around conjoining areas on the roof, such as chimneys, skylights, roof edges, and interior walls.

Improper installation, weather, and age can cause the flashing to become damaged – resulting in a leak.

Damaged Membrane

As you can see, there are a lot of places where commercial roofs are vulnerable to leaks. One possibility is a damaged roof membrane caused by wind, heavy foot traffic, mechanical damage, or another unknown cause. Reach out to a company well-versed in all commercial roofing systems to repair the roofing membrane.


Yes, there is a possibility that it’s time for a new roof on your commercial building. However, a leaking roof doesn’t always mean that you have to jump to this most expensive option.

Commercial Roof Leak? Contact AAA Roofing

Is your commercial roof leaking? Contact AAA Roofing, the leading commercial roofing contractor in Boise, Northern and Southern California, and parts of the Western States.

Regardless of the cause of your roof damage (poor drainage, puncture in the roof’s membrane, high winds), we will make sure your roof is properly sealed so no additional structural damage can occur.

AAA Roofing has a great deal of experience in every roof system. We can also help you by creating a maintenance plan to prolong the life of your aged roof. Schedule a free inspection with AAA Roofing today.

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