Choosing the Right Flat Roof Material for Your Philly Property

Flat roofs are a common sight throughout Philadelphia—from historic South Philly rowhomes to modern townhouses in Northern Liberties. But not all flat roof materials are created equal. At Riley Roofing, we help homeowners choose the right membrane that lasts through harsh Philly winters, humid summers, and everything in between.

Here’s our guide to the top flat roof membrane options—and which one might be best for your home.

1️⃣ EPDM (Rubber Roofing)

Lifespan: 20–30 years
Best For: Budget-friendly durability

Pros:

• Cost-effective
• UV and weather resistant
• Easy repairs

Cons:

• Absorbs heat (black surface)
• Seams can fail if not properly sealed

Why Philly Homeowners Choose It:
EPDM is a solid choice for older rowhomes and low-slope roofs in urban areas. Its flexibility makes it easy to install, and it's relatively low maintenance.

2️⃣ TPO (Thermoplastic Polyolefin)

Lifespan: 20–30 years
Best For: Energy efficiency and reflectivity

Pros:

• White surface reflects UV rays
• Energy-efficient
• Resistant to mold and punctures

Cons:

• Shorter track record than EPDM
• Quality can vary by manufacturer

Why Riley Roofing Recommends It:
TPO is ideal for Philadelphia homeowners who want to reduce cooling costs in the summer. It’s especially useful in areas with lots of sun exposure, like rooftops without shade or trees.

3️⃣ Modified Bitumen

Lifespan: 15–25 years
Best For: Homes requiring strong waterproofing

Pros:

• Multiple layers = better protection
• Great waterproofing
• Ideal for foot traffic (e.g., rooftop decks)

Cons:

• Can be more labor-intensive to install
• May require a torch-down method

When It’s a Smart Choice:
We often install modified bitumen on homes with active rooftop spaces in neighborhoods like Queen Village or Graduate Hospital. It holds up well under pressure—literally.

So, What’s the Best Flat Roof Membrane for Philly Homes?

That depends on your priorities:

PriorityBest MembraneBudget-friendlyEPDMEnergy-efficientTPORooftop deck useModified BitumenLongevity + low maintenanceEPDM or TPO

At Riley Roofing, we don’t believe in one-size-fits-all roofing. We evaluate your home’s age, structure, and how you plan to use your roof to recommend the best option.

Flat Roofs Are Our Specialty in Philadelphia

With over a decade of experience in the city, Riley Roofing is your trusted partner for flat roof replacements, repairs, and inspections. Whether you live in Point Breeze or Pennsport, our licensed pros know how to install a roof that stands up to the city’s four-season weather.

Ready to upgrade your flat roof?
📞 Contact Riley Roofing for a free inspection and get expert advice tailored to your home.