Common Commercial Roof Leaks and Fixes – Learn how commercial roofing solutions from Shepherd Commercial Roofing can protect your property and add long-term value.
A leaking commercial roof isn’t just a nuisance—it’s a risk to your building, your operations, and your bottom line. Whether you manage an office in Dallas, a warehouse in Tyler, or a shopping center in Longview, understanding the most common sources of roof leaks can help you take action before the damage spreads.
At Shepherd Commercial Roofing, we’ve repaired and replaced thousands of flat and low-slope roofing systems across DFW and East Texas. In this guide, we’ll break down the most common causes of commercial roof leaks and how to fix them—fast and effectively.
1. Ponding Water
The Problem:
Flat and low-slope roofs are especially vulnerable to ponding water—water that doesn’t drain within 48 hours after rainfall. This stagnant water adds weight and accelerates membrane deterioration, often leading to leaks.
The Fix:
- Add or clear drainage pathways (scuppers, internal drains)
- Install tapered insulation to improve slope
- Apply elastomeric roof coatings to add waterproofing
- Rebuild low spots during a roof retrofit
2. Damaged or Aging Flashing
The Problem:
Flashing is the metal or membrane material used to seal roof penetrations like HVAC units, skylights, parapet walls, and pipes. Over time, flashing can crack, peel, or detach—letting water in at vulnerable points.
The Fix:
- Remove and replace damaged flashing
- Apply high-quality sealants and reinforce with fabric
- Upgrade to reinforced flashing boots on critical penetrations
- Include flashing inspections in routine maintenance
3. Seam or Membrane Failure
The Problem:
In TPO, PVC, and EPDM roofing systems, seams are welded or adhered to form a watertight seal. When seams pull apart or adhesives fail (due to UV exposure, foot traffic, or age), leaks quickly follow.
The Fix:
- Weld or patch seams using manufacturer-approved materials
- Apply roof coatings to restore elasticity and adhesion
- For older systems, consider a re-cover or retrofit installation
4. Roof Penetrations and Equipment Leaks
The Problem:
Commercial roofs often host multiple pieces of equipment—vents, gas lines, HVAC units, satellite dishes. Each one is a potential entry point for water if not properly sealed.
The Fix:
- Inspect and seal all penetrations using silicone or polyurethane sealants
- Use prefabricated pipe boots for round penetrations
- Reseal pitch pans and curbs around mechanical units
- Add walk pads to reduce foot traffic wear
5. Clogged Drains and Gutters
The Problem:
When drains, scuppers, or downspouts are clogged with debris, water backs up and finds the path of least resistance—usually through your roof seams or walls.
The Fix:
- Perform seasonal cleaning of all drains and gutter systems
- Add leaf guards or screens
- Incorporate this into your building’s preventative maintenance plan
6. Improper Installation
The Problem:
Unfortunately, many commercial leaks stem from poor workmanship. This includes incorrect insulation placement, loose fasteners, uneven membranes, or misaligned seams—all of which may not show symptoms until heavy rain hits.
The Fix:
- Perform a detailed infrared scan or drone inspection
- Rework poorly installed sections
- Consider a full roof replacement if installation errors are widespread
- Choose certified contractors like Shepherd Commercial Roofing
Why Timely Leak Repairs Matter
Ignoring a roof leak—even a small one—can lead to:
- Interior water damage and mold
- Compromised insulation and energy loss
- Electrical hazards
- Disruption to operations or tenants
- Structural deterioration
Our Leak Repair Process
At Shepherd Commercial Roofing, we offer:
✅ Free roof inspections across DFW and East Texas
✅ Moisture detection, drone imaging, and thermal scans
✅ Detailed repair plans with photos and estimates
✅ Warranty-backed solutions using TPO, Modified Bitumen, and Metal systems
✅ Ongoing maintenance programs to prevent future issues
Serving DFW and East Texas Commercial Properties
We’re proud to be a Mule-Hide Certified Contractor and a member of the National Roofing Contractors Association (NRCA), ensuring every project meets the highest standards in commercial roofing quality and professionalism.
We’ve earned the trust of property managers, facility directors, and business owners from Plano to Tyler by providing reliable, long-lasting roofing solutions. Whether you manage an industrial facility, retail space, church, or school—we’ve got you covered.
📍 Proudly serving Dallas, Fort Worth, Plano, Garland, Tyler, Longview, and surrounding areas
📞 Call Shepherd Commercial Roofing DFW Office at (214) 664-8266
📞 Call Shepherd Commercial Roofing Tyler Office at (903) 339-0882
🌐 Visit www.shepherdcommercialroofing.com