Flat Roofing

A critical component of any flat roof system—especially under Florida Building Code—is ensuring that all rooftop structures, vents, and penetrations are properly fastened and sealed to prevent water intrusion and withstand severe weather conditions as well as a proper sloping..

Our skilled flat roofing professionals work with industry-leading systems, including:

• TPO (Thermoplastic Polyolefin): Energy-efficient and highly reflective

• PVC (Polyvinyl Chloride): Durable and resistant to chemicals and fire

• SPF (Spray Polyurethane Foam): Seamless, insulating, and highly energy-efficient

• EPDM (Rubber Roofing): Flexible, reliable, and long-lasting

• Modified Bitumen: A multi-layer system known for strength and waterproofing

With Puma Roofing, you can trust that your flat roof will be built with precision, durability, and performance in mind—engineered specifically for Florida’s demanding climate.

Flat Roof Design & Performance

Flat roofs are designed with a slight slope—typically between ¼” and ½” per foot—to ensure proper water drainage. Careful planning and expert installation are essential to create effective drainage systems, including scuppers, gutters, and internal drains. Proper drainage helps prevent ponding water, reduces the risk of leaks, and significantly extends the lifespan of your roof. Low-slope roof systems also offer added versatility by maximizing usable rooftop space. This makes them ideal for accommodating solar panels, HVAC systems, and other equipment without compromising functionality.

Additionally, many flat roofing systems use reflective membranes that improve energy efficiency by reducing heat absorption—helping to lower cooling costs, especially in Florida’s hot climate.

Types Of Flat Roof Systems

Modified Bitumen Roofing Systems

Modified bitumen is a durable, multi-ply roofing system commonly used on residential and small-scale commercial low-slope or flat roofs. It is made from asphalt reinforced with fiberglass or polyester and enhanced with polymer modifiers such as rubber (SBS) or plastic (APP). This combination creates a roofing system that offers excellent waterproofing, flexibility, and resistance to temperature fluctuations—making it well-suited for Florida’s demanding climate.

Modified bitumen roofs are typically installed using heat-welding, cold-process adhesives, or self-adhering membranes. Most systems are built as two-ply or multi-ply applications, providing redundant layers of protection against leaks.

Key benefits include:

• Superior Flexibility: Polymer-modified rubber allows the system to expand and contract without cracking

• Enhanced Strength: Reinforced with fiberglass or polyester for long-term durability

• High Traffic Resistance: Ideal for roofs that experience regular maintenance foot traffic

• Fire Resistance: Offers strong performance against fire exposure

• Energy Efficiency: Often finished with a reflective coating to reduce heat absorption and improve efficiency

With proper installation and maintenance, modified bitumen roofing systems typically last 20–30 years, delivering reliable, long-term performance.

EPDM Roofing Systems

EPDM (Ethylene Propylene Diene Monomer) is a durable, flexible synthetic rubber roofing membrane ideal for low-slope and flat roofs. Known for its longevity, EPDM systems typically offer a lifespan of 20–50 years when properly installed and maintained.

This roofing material is highly resistant to UV radiation, weathering, and hail—capable of withstanding impacts from hail up to 3 inches in diameter. It also remains flexible in extreme temperatures as low as -40°F, allowing it to expand and contract with the structure without cracking.

EPDM is fully adhered by gluing the membrane directly to the roof substrate, creating a secure and watertight seal. It is also a low-maintenance roofing solution, making it a popular choice for both residential and commercial properties.

Considerations and benefits include:

• Exceptional Durability: Strong resistance to UV rays, weather, and hail damage

• Flexibility: Performs well in extreme temperature fluctuations

• Low Maintenance: Requires minimal upkeep over its lifespan

• Puncture Awareness: As a rubber material, it can be punctured by sharp or heavy objects

• Energy Performance: Standard black EPDM absorbs heat, which may increase cooling costs; however, white EPDM options are available

To further improve energy efficiency, Puma Roofing applies a reflective topcoat, helping reduce heat absorption and lower cooling costs—especially important in Florida’s climate.

PVC Roofing System

PVC (Polyvinyl Chloride) is a high-performance, single-ply thermoplastic membrane primarily used for flat or low-slope roofs. Commonly applied in commercial settings, PVC is installed by heat-welding the seams between sheets, creating a continuous, watertight membrane. Unlike systems that rely on glue or tape, PVC seams form a permanent, monolithic bond that is essentially impervious to water.

PVC roofing is highly valued for its:

• Exceptional Durability: Resistant to weather, wind, and mechanical wear

• Chemical Resistance: Withstands grease, oils, and industrial chemicals, making it ideal for restaurants, manufacturing facilities, and other commercial properties

• Energy Efficiency: Typically produced in white, PVC reflects up to 90% of solar energy, reducing cooling costs significantly

• Fire Resistance: Naturally fire-retardant and self-extinguishing

• Wind Resistance: Properly installed systems can endure winds exceeding 100 mph

While extremely tough, PVC can be vulnerable to punctures from sharp objects or heavy foot traffic, particularly in colder temperatures below 50°F when the material may become slightly more brittle.

A professionally installed and maintained PVC roof typically lasts 20–30 years, with premium systems sometimes reaching up to 40 years, providing long-term protection and performance for commercial and industrial properties.

TPO Roofing Systems

Thermoplastic Polyolefin (TPO) is a single-ply roofing membrane designed for flat or low-slope roofs, and it is widely used on commercial buildings due to its energy efficiency and durability. TPO roofing reflects UV rays, helping to lower cooling costs by up to 20%, making it an excellent choice for Florida’s hot climate.

Key features of TPO roofing include:

• Energy Efficiency: Highly reflective membrane reduces heat absorption and lowers cooling costs

• Durability: Reinforced with a polyester scrim to resist tears, punctures, and general wear

• Strong Seams: Heat-welded seams are 3–6 times stronger than seams joined with glue or tape

• Cost-Effective: Offers a strong balance of performance and affordability compared to PVC

• Lifespan: Typically lasts 15–30 years, depending on membrane thickness and proper maintenance

The performance of a TPO roof system depends heavily on the quality of the seam heat-welding, making professional installation essential. Our skilled roofing mechanics at Puma Roofing ensure every TPO roof is installed to the highest standards for long-lasting results.

SPF Roofing Systems

Spray Polyurethane Foam (SPF) roofing is a seamless, liquid-applied system that expands into a solid, closed-cell foam layer upon application. It is commonly used for commercial and industrial buildings, but it is also growing in popularity for residential flat roofs due to its superior insulation and leak protection.

Key benefits of SPF roofing include:

• Exceptional Insulation: SPF offers the highest R-value of any conventional roofing material, typically R = 6.5 per inch, helping reduce cooling costs by 30–50%

• Seamless Protection: Sprayed-on application creates a monolithic (one-piece) barrier, eliminating seams and joints that are common failure points in traditional roofing

• Integrated Sealing: The foam naturally seals around vents, pipes, and other roof penetrations, reducing the need for additional metal flashing

• Eco-Friendly Application: SPF can often be applied directly over an existing roof, minimizing tear-off, reducing landfill waste, and saving time

• Durability and Weather Resistance: The closed-cell foam provides excellent resistance to moisture, air infiltration, and extreme weather conditions