Single-Ply Roofing for Commercial Buildings in South Florida
All Phase Construction USA is a dual-licensed roofing and general contractor (CCC-1331464, CGC-1526236) specializing in single-ply TPO and PVC roofing systems for commercial buildings across Broward County, Palm Beach County, and South Florida. With 20+ years of experience installing heat-welded membrane systems engineered for HVHZ wind code compliance, we deliver long-term durability for flat and low-slope commercial roofs.
Based in Deerfield Beach, our certified installers provide professional TPO and PVC installation with verified quality control — from warehouses and retail centers to condominiums and government facilities. Call (754) 227-5605 for a free single-ply roofing assessment.
What Is Single-Ply Roofing?
Single-ply membrane roofing systems provide waterproofing in a single flexible sheet, typically installed over commercial flat or low-slope roofs. Unlike built-up roofing or modified bitumen (which use multiple layers), single-ply systems achieve complete weather protection in one membrane layer.
The most common single-ply systems are TPO (thermoplastic polyolefin), PVC (polyvinyl chloride), and EPDM (rubber). In South Florida, TPO and PVC dominate the commercial roofing market due to their heat-welded seam technology, reflective surfaces, and proven performance in high wind and high heat environments.
Single-ply membranes are mechanically fastened or fully adhered to the roof deck, with seams heat-welded to create continuous waterproof coverage. When properly installed, these systems provide excellent durability, energy efficiency, and hurricane resistance for commercial buildings throughout Broward and Palm Beach Counties.
Single-Ply Roofing Systems We Install
TPO Roofing
Cost-effective, reflective, and widely used across commercial properties in South Florida.
- White reflective surface reduces cooling costs
- Heat-welded seams for wind resistance
- 15-25 year expected lifespan
- Lower initial cost than PVC
- HVHZ-approved systems available
Best for: Standard commercial applications, warehouses, office buildings, retail centers
PVC Roofing
Premium long-term system with superior chemical resistance, fire rating, and cohesive welded seams.
- Naturally fire-retardant (Class A rated)
- Resistant to grease, oils, and chemicals
- 25-30+ year expected lifespan
- Maintains reflectivity longer than TPO
- Cohesive welds (materials become one)
- Superior long-term performance in HVHZ
Best for: Buildings with restaurants, long-term ownership, properties prioritizing maximum durability and wind performance
EPDM (Rubber)
Not commonly used in South Florida due to climate-related performance issues.
- Seams are glued, not welded
- Adhesives degrade in high heat and humidity
- Seam failures common in South Florida
- Black surface absorbs heat
Why we don't recommend EPDM: Glued seams don't hold up well in Florida's demanding climate. TPO and PVC outperform EPDM in this region.
PVC vs TPO: South Florida & HVHZ Comparison
TPO and PVC can look nearly identical once installed—both are white, reflective, and heat-welded. But they are molecularly different products with distinct performance characteristics.
| Feature | PVC | TPO |
|---|---|---|
| Seam Strength (HVHZ Critical) | Cohesion: Materials molecularly fuse and become one. Tends to tear before separating. | Adhesion: Materials bond at interface. Can separate under extreme stress. |
| Expected Lifespan | 25-30+ years | 15-25 years |
| Chemical/Grease Resistance | Excellent. Ideal for restaurants and commercial kitchens. | Moderate. Can be degraded by sustained grease exposure. |
| Reflectivity Retention | Maintains reflectivity longer with less maintenance | Can experience chalking and reflectivity loss over time |
| Fire Rating | Naturally fire-retardant. Commonly achieves Class A as part of approved assembly. | Can achieve Class A with proper assembly |
| Initial Cost | 10-20% higher than TPO | More affordable upfront |
| Best Use Cases | Long-term ownership, buildings with restaurants/grease, maximum wind performance, premium properties | Standard commercial applications, cost-conscious projects, shorter ownership horizons |
The Bottom Line:
TPO is an excellent, proven system for commercial roofing. PVC is the premium choice when maximum longevity, superior wind performance, chemical resistance, and long-term cost efficiency are priorities. Both far outperform EPDM in South Florida's climate.
Why Welded Seams Matter in High Wind Zones
In South Florida's High Velocity Hurricane Zone, your roof must withstand sustained winds exceeding 140 mph with gusts well beyond that. Single-ply roofing systems rely on their seams to maintain integrity under extreme uplift forces.
Heat-welded seams are not all created equal. The difference between cohesion and adhesion becomes critical when wind loads approach design limits.
Cohesion (PVC)
The two pieces of membrane molecularly bond during heat welding and become a single piece of material.
Under stress, the seam is as strong as the membrane itself. If failure occurs, the membrane will tear before the seam separates.
Think of it like welding two pieces of metal together—they become one continuous piece.
Adhesion (TPO)
The two pieces of membrane bond at the interface during heat welding, but remain two separate pieces.
Under extreme stress, the bond can separate at the interface before the membrane itself tears.
Think of it like gluing two pieces of plastic together—the bond is strong, but it's still two pieces.
Installation Quality Is Everything
Regardless of membrane chemistry, proper welding technique matters more than the product itself. A poorly welded PVC seam will fail. A properly welded TPO seam will hold.
- Correct welding temperature for ambient conditions
- Appropriate weld speed and pressure
- Clean, dry membrane surfaces before welding
- Quality control testing of completed welds
We verify every seam through destructive pull testing during installation—not just visual inspection.
Common Single-Ply Roof Problems We Fix
Seam Failure
Improperly welded seams separating under wind uplift or thermal cycling. Most common in older TPO installations or when welding wasn't properly verified.
Fix: Re-weld failed seams or install cover strips with verified welds
Flashing Failures
Penetrations, parapet walls, and roof edges where membrane transitions are improperly sealed. Common at HVAC curbs and drain locations.
Fix: Properly detail flashings with heat-welded terminations and appropriate reinforcement
Drain & Scupper Issues
Clogged drains causing ponding water, or improperly flashed drain assemblies allowing water infiltration beneath membrane.
Fix: Clean and maintain drains; properly flash drain assemblies with clamping rings
Punctures & Tears
Damage from foot traffic, dropped tools, HVAC work, or storm debris. Single-ply membranes can be punctured if not properly protected.
Fix: Patch with heat-welded membrane; install walkway pads in high-traffic areas
Ponding Water
Water remaining on roof 48+ hours after rain. Accelerates membrane degradation and can lead to seam failures.
Fix: Install tapered insulation system or additional drains to eliminate standing water
HVAC Curb Penetrations
Equipment installations cutting through membrane without proper curbs and flashing. Major leak source in commercial roofs.
Fix: Install proper equipment curbs with heat-welded base flashings and storm collars
Our Single-Ply Roofing Process
1. Professional Roof Assessment
We inspect your existing roof condition, measure the building, assess drainage, identify structural concerns, and evaluate insulation needs. If replacing an existing roof, we use infrared scanning to detect trapped moisture.
Deliverable: Detailed inspection report with photos, measurements, and recommendations
2. Engineered Proposal
We provide a detailed proposal specifying membrane type and thickness, attachment method (mechanically fastened, fully adhered, or ballasted), insulation R-value, warranty options, and project timeline. TPO and PVC options are presented with clear performance and cost differences explained.
Deliverable: Written proposal with system specifications, warranty terms, and total project cost
3. Professional Installation
Our crews tear off existing roofing (if required), inspect and repair deck structure, install insulation and cover board, mechanically fasten or adhere membrane, heat-weld all seams with continuous quality verification, detail all flashings and penetrations, and conduct final seam testing. Project manager on-site throughout installation.
Deliverable: Completed roof system with photo documentation of critical details and weld testing results
Single-Ply Roofing Questions — Answered
What is single-ply roofing?
Single-ply roofing is a commercial-grade flat roof system made from one waterproof membrane layer—most commonly TPO or PVC—that's heat-welded to create a sealed, durable roof surface.
What's the difference between TPO and PVC roofing?
TPO and PVC can look almost identical once installed, but molecularly they're very different products, and that difference impacts long-term performance, seam strength, and chemical resistance.
Which single-ply roof is best for South Florida?
In South Florida, PVC is typically the best long-term single-ply system because it holds up better over time, performs extremely well in heat, and is ideal for high-wind conditions when properly welded.
Is PVC roofing worth the extra cost?
Yes—PVC is a premium single-ply roof that usually lasts longer and performs better long-term, which makes it a smart investment for building owners who want durability, energy efficiency, and fewer problems down the road.
Why is EPDM not popular in South Florida?
EPDM isn't as common here because the seams are glued, and in hot, humid South Florida conditions, adhesives simply don't hold up as reliably over time compared to heat-welded systems.
Are PVC seams stronger than TPO seams?
Yes—when installed correctly, PVC welds are typically stronger than TPO welds, which is exactly what you want on a roof that has to perform in hurricane conditions.
What does "cohesion vs adhesion" mean for welded seams?
PVC welding is cohesion, meaning the membrane becomes one solid piece, while TPO welding is adhesion, meaning it bonds at the interface—so under extreme stress, adhesion can separate while cohesion usually tears before it comes apart.
Can single-ply roofs handle hurricane-force winds?
Yes—single-ply roofs perform extremely well in high wind zones when the seams, flashing, and perimeter details are installed correctly, which is why quality workmanship matters as much as the material.
How long does a PVC roof last compared to TPO?
PVC typically lasts longer than TPO in real-world conditions, especially when the roof is maintained and installed with strong seam welds and proper edge details.
Does TPO lose reflectivity over time?
Yes—TPO can lose reflectivity as it ages, while PVC tends to hold its reflective performance longer, which helps with heat management and energy efficiency.
Is PVC roofing resistant to grease from restaurants?
Yes—PVC is naturally more resistant to grease and certain chemicals, which makes it a better choice for buildings that may have future tenants like restaurants or units with grease traps.
Is PVC roofing fire-rated?
PVC is naturally fire-retardant and is commonly installed in Class A fire-rated assemblies, which is a major advantage for commercial properties and certain building requirements.
Is TPO roofing fire-rated too?
Yes—TPO can be fire-rated, but it often relies on added fire-retardant and filler materials, and over time those can weather out and make future welding and repairs more difficult.
Why is PVC easier to repair than TPO years later?
PVC is typically easier to re-weld and repair long-term because it welds cleanly and consistently, while aging TPO can become harder to weld to as surface chemistry changes over time.
How do I know if my roof needs repair or replacement?
If you're seeing recurring leaks, seam issues, ponding water, or wet insulation, you need a professional inspection to determine whether it's a repairable detail problem or a full system failure.
Can you install single-ply over an existing roof?
Sometimes yes—if the existing roof is stable and meets code requirements, a recover may be possible, but many roofs need a full tear-off to fix trapped moisture and meet proper attachment standards.
How long does a single-ply roof installation take?
Most commercial single-ply projects take anywhere from a few days to a couple weeks depending on roof size, weather, tear-off requirements, and how many penetrations and edge details the roof has.
Do single-ply roofs require maintenance?
Yes—like any roof system, single-ply performs best with routine inspections and maintenance, especially around seams, drains, curbs, and flashing details.
Can I put a single-ply roofing system on my residential flat roof?
Yes—and in many cases it's a better option because single-ply roofs are more energy efficient and longer-lasting than asphalt-based flat roof systems when installed correctly.
PVC vs TPO — What Building Owners Should Know
Both systems work well when installed correctly, but understanding the differences helps you make the right choice for your building's needs and priorities.
If you're deciding between TPO and PVC, the truth is they can look almost identical once installed—but they don't perform the same long-term. In South Florida, the heat, humidity, and wind exposure make seam integrity and repairability matter more than anything. That's why we often recommend PVC as the premium single-ply system when you want the strongest welds, better chemical resistance, and a roof that's easier to service years down the road.
Best Use Case
Premium long-term performance for commercial roofs, especially high-wind and tenant-change properties.
Cost-effective commercial roofing option with strong performance when installed correctly.
Seam Welding Strength
Cohesion weld (membrane becomes one solid piece); tends to tear before separating.
Adhesion weld (bonding at the interface); under extreme stress it can separate.
HVHZ / Hurricane Performance
Excellent for HVHZ when detailed correctly; strong welded seams are a major advantage.
Performs well when installed correctly, but seam performance depends heavily on weld quality.
Reflectivity Over Time
Holds reflectivity longer over the life of the roof.
Can lose reflectivity as it ages.
Grease / Chemical Resistance
Strong resistance; better for restaurants and future tenant changes.
More limited resistance compared to PVC.
Fire Rating
Naturally fire-retardant and commonly installed in Class A rated assemblies.
Can be fire-rated but often uses added fire-retardants and fillers.
Repairability Years Later
Typically easier to re-weld and repair long-term.
Can become harder to weld to over time as fillers and surface chemistry change.
Visual Appearance
Looks very similar to TPO once installed.
Looks very similar to PVC once installed.
Price Level
Premium cost, premium performance.
More budget-friendly.
Which System Is Right for Your Building?
The answer depends on your priorities, budget, and long-term plans. If you're planning to own the building long-term, prioritize durability over upfront cost, or expect tenant turnover with potential restaurant use—PVC is typically the better investment. If you need a cost-effective solution with solid performance for a standard commercial application, TPO is an excellent choice when installed by experienced contractors.
Serving Broward & Palm Beach Counties
Deerfield Beach • Pompano Beach • Fort Lauderdale • Boca Raton • Delray Beach • Coral Springs • Boynton Beach • West Palm Beach & surrounding areas
Ready to Discuss Your Commercial Roofing Project?
Whether you're evaluating TPO vs PVC, planning a roof replacement, or addressing leak issues—we'll assess your building and provide clear recommendations based on your priorities and budget.