This is caused when the roofing membrane shortens due to either improper installation or escaping moisture. Roofing can also get tears or punctures from nails, screws, and from people walking on it a lot.
The most common problems seen in commercial roofs are leaking and rotting wood caused by leaks or bad weather over time. It is important to schedule regular maintenance checks to fix any minor problems before they become major ones.
Since most commercial roofs are flat, they can also have standing water after a heavy downpour or melting snow. If the gutters and drainage are not working properly and the water stays there for extended periods, it can cause mold and mildew as well as leaks.
Damaged flashing is another possible issue you may face. Flashing protects the joints and seams. Being a business, you have multiple seams on your roofs for HVAC systems, vents, and skylights. If these become loose or damaged by high winds, extreme temperatures, or ice buildup, it can also cause leaks and other issues.