Common Commercial Roofing Problems in Philadelphia And How to Avoid Them

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No matter how well-built a commercial roof may be, issues can develop over time — especially in a city like Philadelphia, where weather swings and environmental stressors take their toll. Knowing the common problems with commercial roofing in Philadelphia can help you stay ahead of repairs and extend your roof’s life.

1. Ponding Water on Flat Roofs

Philadelphia buildings often have flat or low-slope roofs. Poor drainage design or clogged scuppers can lead to ponding water — a condition where water collects and stays on the roof surface for over 48 hours. This weakens the roof membrane and leads to leaks.

Solution: Regular inspections and proactive maintenance ensure your drains are always clear.

2. Membrane Shrinkage and Cracking

Temperature fluctuations — common in Philadelphia — can cause roofing materials like EPDM or TPO to expand and contract. Over time, this leads to cracks or shrinkage that expose the underlying insulation.

Solution: Choosing a flexible, weather-resistant membrane and scheduling seasonal maintenance.

3. Leaky Flashing and Seals

Flashing connects roof sections and seals penetrations (like HVAC units or skylights). If improperly installed or degraded by weather, water can seep into the building — causing interior damage and mold.

Solution: A qualified roofer will use reinforced, weatherproof materials and inspect seals regularly.

4. UV & Heat Damage

Philadelphia summers can get hot, and prolonged UV exposure breaks down certain roofing materials. This accelerates aging and causes surfaces to blister or crack.

Solution: Reflective or cool roofing systems are ideal to reduce heat absorption and protect the membrane.

5. Poor Installation

The most preventable issue is poor workmanship. Untrained or rushed installers might skip critical steps, resulting in failure within a few years.

Solution: Hire experienced professionals like Discounted Roofing LLC, who follow best practices and industry standards.