We frequently recommend Duro-Last® single-ply systems for large, complex warehouse roofs because they’re custom tailored to your building’s needs, engineered for speed, precision, and long-term performance.

One of the biggest realized benefits when it comes to performance of Duro-Last’s PVC roofs, is the emissivity. Emissivity is how effectively a roof radiates away absorbed heat, and Duro-Last’s white PVC membranes are engineered for exceptionally high thermal emittance—among the highest available in the roofing market—so the surface sheds heat instead of storing it. That high emissivity, paired with strong solar reflectance, helps keep rooftop temperatures lower and can reduce cooling loads for improved energy efficiency and comfort.

Emissivity is measured on a 0–1 scale, and high-performing white PVC typically tests in the ~0.90+ range when clean, which is the top tier for commercial membranes. Reflectance bounces sunlight back; emissivity releases the heat that does get absorbed—together they produce a high Solar Reflectance Index (SRI) for cooler roofs. In hot, sunny climates like Florida, that combination can cut peak rooftop temperatures dramatically, lower HVAC demand (especially late afternoon), and improve occupant comfort. High emissivity also helps the roof shed heat quickly after sunset, reducing thermal cycling stress on seams and flashings, which can support long-term durability. Performance is verified with standard test methods (e.g., ASTM C1371 for emittance), and while regular washing mainly preserves reflectance, emissivity on quality white PVC tends to remain high over time. For specs and submittals, look for the membrane’s listed emittance value alongside reflectance/SRI to document compliance with cool-roof criteria in energy codes.

Standout benefits of Duro-Last®:

• Custom fabricated accessories: accessories arrive pre‑made to exact dimensions, speeding installs, cutting field welding and waste, and reducing leak‑prone seams for cleaner, more reliable roofs.
• Custom-fabricated sheets: Large panels are factory-made to your roof’s exact dimensions, reducing field seams and installation time—ideal for massive footprints. See how fabrication shortens installs.
• Highly reflective, cool-roof surface: Helps manage heat on wide, sun-exposed surfaces—key for energy-intensiveor temperature-sensitive operations. Learn about reflectivity.
• Reinforced durability: A scrim-reinforced membrane resists tears and punctures in high-traffic service zones (RTUs, exhausts, walkways). View membrane details.
• Comprehensive accessories: Prefabricated curbs, stacks, and edge metals streamline detailing—critical for leak-free performance on busy warehouse roofs. Explore accessories.
• Proven, code-compliant assemblies: Solutions for steel, wood, and concrete decks with uplift ratings suited for Florida weather. Ask SPC about approved assemblies.

Want to evaluate Duro-Last® vs. TPO for your facility? Book a side-by-side comparison.

Converting Old Roofs (Mod Bit, EPDM, or BUR) to Single-Ply

Many Jacksonville facilities are running out the clock on modified bitumen, EPDM, or built-up roofs. We specialize in roof-over conversions to TPO or Duro-Last® where code and conditions allow.

Typical conversion path with SPC Commercial Roofers:

1. Moisture survey & core cuts to map wet zones and verify deck integrity. Schedule a survey.
2. Targeted tear-off of saturated areas; keep dry areas in place to cut waste and disruption. Discuss tear-off strategies.
3. Cover board + insulation upgrade to improve R-value, durability, and fastener pull-out resistance. Plan your R-value.
4. Mechanically attached or adhered membrane (TPO or Duro-Last®) selected for wind zone and deck type. Get an attachment recommendation.
5. Edge metals, terminations, and flashings installed to manufacturer specs for warranty eligibility. Request a spec-compliant scope.

Energy Efficiency: Insulation, Reflectivity & Lifecycle Savings

Large roofs = large energy swings. Our warehouse roofing packages combine cool-roof membranes (TPO or Duro-Last®) with insulation and cover boards to tame heat and extend service life.

• Reflective membranes reduce rooftop temperatures on long, sun-baked runs. Explore cool roof strategies.
• Polyiso insulation & taper systems improve R-value and drainage. Map out a drain plan.
• Durable cover boards resist hail and foot traffic, protecting the membrane during service. Ask about cover boards.
• Long-term ROI modeling weighs energy savings, reduced repairs, and warranty coverage. Request an ROI projection.

Attachment Methods for Big-Footprint Roofs

We select the attachment approach that matches your deck, wind zone, and operations:

• Mechanically attached: Fast and cost-effective on steel decks; excellent wind performance. See if you qualify.
• Fully adhered: Smooth aesthetics, strong uplift resistance, and excellent performance over concrete decks. Discuss adhered options.
• Hybrid or induction-welded: Pair speed with smooth finished surfaces in select assemblies. Explore hybrid systems.