What Is Flat Roofing? Types & Benefits for Commercial Buildings
- Mar 27
- 2 min read
If you’ve ever looked at modern commercial buildings, you’ve probably noticed the clean, horizontal look of flat roofs. This design isn’t just about appearance—it’s a practical and cost-effective solution used across commercial properties today.
At Waters Roofing, we help business owners understand their roofing options so they can make the best investment. If you're considering upgrading or installing a new roof, here’s everything you need to know about flat roofing systems.
What Is Flat Roofing?
Despite the name, a flat roof isn’t completely flat. It has a slight slope—typically about a quarter inch per foot—to allow proper water drainage.
Compared to traditional pitched roofs:
Flat roofs have a slope of 10° or less
Sloped roofs usually range between 14° and 36°
This subtle design makes flat roofs ideal for large commercial buildings where space, accessibility, and efficiency matter most.
Types of Flat Roofing Systems
Choosing the right material is key to maximizing the performance of your roof. Here are the most common flat roofing materials used today:
1. PVC Roofing (Polyvinyl Chloride)
PVC is a durable single-ply membrane known for its strength and longevity.
Benefits:
Excellent resistance to water, fire, and chemicals
Heat-welded seams reduce leaks
Energy-efficient and reflective
Low maintenance
2. EPDM Roofing (Rubber Roofing)
EPDM is a flexible rubber membrane widely used in commercial roofing.
Benefits:
Affordable and easy to install
Resistant to extreme weather conditions
Long lifespan
Great insulation properties
3. TPO Roofing (Thermoplastic Polyolefin)
TPO is one of the fastest-growing roofing options due to its energy efficiency.
Benefits:
Reflects sunlight and reduces cooling costs
Environmentally friendly
Flexible and durable
Strong leak resistance
4. Modified Bitumen (SBS Roofing)
SBS is an asphalt-based system designed for flexibility and durability.
Benefits:
Long lifespan (20–40 years)
Excellent weather resistance
Ideal for colder climates
Strong and flexible
Benefits of Flat Roofing for Commercial Properties
Flat roofs offer more than just a modern look—they provide real business advantages.
✔ Cost-Effective Installation & Repairs
Flat roofs require fewer materials and less labor, making them more affordable to install and maintain.
✔ Easy Maintenance
The flat surface allows easier access for inspections, repairs, and equipment servicing.
✔ Extra Usable Space
Flat roofs can be used for:
HVAC systems
Solar panels
Storage
Rooftop patios or workspaces
✔ Energy Efficiency
Reflective materials and coatings help reduce heat absorption, lowering energy bills.
✔ Durability
Flat roofing systems are designed to handle heavy equipment and foot traffic, making them ideal for commercial use.
Get a Free Flat Roof Consultation Today
If you’re considering a flat roof or need expert advice, Waters Roofing is here to help.
Contact us today to schedule your inspection and discover the best roofing solution for your property.
