The Most Vulnerable Parts of Your Roof – Commercial
John Esh
December 31, 2025

Lorem ipsum dolor sit amet

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. 

If you own or manage a commercial building, you know how important roof maintenance is. Roof damage or failure can cost your business a HUGE chunk of change.

Basket filled with assorted coins, with a woven blue and white rim.

A major problem with your roof can cost more than just the price of repair – it can damage your equipment, inventory, and be dangerous to employees. It can cost you valuable time if your business has to shut down. It’s important to understand your roof so that you can catch potential problems before they come expensive catastrophes.


If your building has a flat rubber or TPO roof, its warning signs are different than they would be for a steep-slope shingled roof. But, most of the roofing advice out there is for residential shingle roofs.


So, how can you become an informed roof owner and monitor your own roof for warning signs? Start by checking these parts of your roof:

Units

Rooftop with HVAC units and metal railings against a corrugated building.

Anywhere a heating or air unit sits on your roof is a potential problem area. The flashing on the corners can bridge, peeling out of the corner and stretching the roofing material. Look for bridging around all units, as well as any signs of peeling or leaking all the way around units.

Pipes

Flat white rooftop with metal vents and HVAC units under a blue sky. Trees in the background.

Pipes that run through the roof are also common leak points. Make sure that the edges of the pipe boot aren’t peeling up, and that the neck of the boot is still tight around the pipe.

Seams

Black and white view of a flat rooftop with a raised HVAC unit and a curved metal roof section.

Rubber and TPO are installed in large rolls and seamed together. These seams are another area to keep an eye on. The natural expansion and contraction of the roof can place strain on the seams and over time they can begin to pull apart. Test seams by checking for peeling or separation.

Patches

Overhead view of a dark, patterned surface with raised rectangular feature at the center.

If your roof has ever been damaged and patched, the patched places are more vulnerable than the rest of your roof. Make sure its edges aren’t peeling or separating.

LEARN MORE

If to want to learn more, there are a few ways:


You can schedule a roof inspection with a professional roofer to learn more about your specific roof. This is always a good idea, especially if your roof is more than ten years old. A roofer can analyze the status of your whole roof and recommend a maintenance plan that will protect your building. If you’re in OUR AREA, you can CONTACT US to schedule a roof inspection.


If you want to stay up to date on our roofing tips, follow our blog by entering your email in the form below!

Close-up of a metal roof with triangular, sawtooth-shaped vents along the edge.
By John Esh December 31, 2025
Metal roofing offers lasting protection and reliable performance - discover what truly affects longevity and value so you can invest in a roof that pays off.
Contractor inspecting a commercial flat roof, showing factors that affect how long flat roofs last s
By John Esh December 31, 2025
How Long Do Flat Roofs Last? The answer depends less on materials and more on drainage, maintenance, and installation quality that quietly determine roof lifespan.
Church exterior with text overlay:
By John Esh December 31, 2025
We've put together a list of considerations to help trustees and other church leaders determine a course of action for their church roof. Learn more here!

John Esh | CEO & Master Installer

  • 25+ Years Experience: From ground crew to Master Certified Installer.
  • Local Roots: Serving Lancaster, Harrisburg, and SEPA since 1991.
  • Credentials: GAF Master Certified (ME27586); Licensed in PA (PA124258) & MD (#137952).
  • The "Why": Obsessed with "radical transparency" to remove the fear factor from home improvements.

James Wesser | Content Producer

  • Background: Former local news digital producer and journalist.
  • The Mission: Turning complex roofing jargon into clear, "fluff-free" answers for homeowners.
  • Local Tie: When not filming on-site, he’s likely roaming Hersheypark or building digital worlds.

Meet The Experts