THE SCIENCE OF
SPF ROOFING
Decades of peer-reviewed research, government studies, and real-world performance data make the case for SPF commercial roofing. Here is the evidence.
THE NUMBERS BEHIND
THE SCIENCE
Highest R-value per inch of any commercial roofing insulation. Closed-cell SPF outperforms fiberglass, XPS, and polyiso at equivalent thickness.
Reflective silicone topcoat plus R-6.5/inch insulation cut HVAC loads. Buildings in IECC Climate Zone 5A show 15-30% lower annual HVAC energy costs per ORNL Roof Savings Calculator modeling.
SPF roofs installed in the 1970s remain in service today. When properly maintained with periodic recoats, SPF systems can last indefinitely.
Unlike single-ply or built-up systems, SPF creates a continuous, seamless barrier with zero joints, laps, or fastener penetrations where leaks typically originate.
HOW SPF CUTS
ENERGY COSTS
Closed-cell spray polyurethane foam combines the highest R-value per inch of any commercial roofing insulation with seamless air sealing, delivering compounding energy savings year over year.
“The experience that Texas A&M University Physical Plant has gained since 1974 indicates that no major problem, and very few minor ones, exist in the polyurethane roof systems.”
SAM COHEN, TEXAS A&M PHYSICAL PLANT DEPT.
LBNL Heat Island Group modeling shows that raising roof reflectance from the 10-20% typical of dark membranes to 60%+ with a white coating cuts building cooling-energy use by more than 20% (Levinson & Akbari, 2010).
Air leakage can account for up to 40% of a building's heating and cooling energy loss (DOE / ENERGY STAR). SPF's monolithic, fully adhered assembly seals the roof plane without joints or fasteners.
Silicone-coated SPF reflects solar radiation and reduces peak roof surface temperatures by up to 60 degrees F vs. dark membranes (CRRC / ENERGY STAR product data), extending both HVAC and roof life.
A 50-YEAR
TRACK RECORD
Early SPF commercial roofing installations begin across the U.S., primarily on large flat-roof structures.
SPFA documents roofs installed in the 1970s still performing without replacement. First major longevity studies published.
Next-generation silicone coatings extend recoat cycles to 15-20 years and dramatically improve UV and ponding water resistance.
Original SPF roofs from the early 1970s remain in active service. Industry consensus: properly maintained SPF systems can last indefinitely.
LAYER BY LAYER.
Each layer of an SPF roofing system serves a specific engineering purpose. Together they create a seamless, insulated, reflective commercial roof system.
SPF bonds directly to the existing roof membrane (BUR, TPO, EPDM, metal, modified bitumen). No tear-off required. The existing roof becomes the substrate for the new system.
The core of the system. Closed-cell polyurethane foam delivers R-6.5 per inch of insulation, structural reinforcement, and a completely seamless air/moisture barrier.
UV protection, solar reflectance, and weather resistance. Silicone topcoats maintain flexibility and adhesion through extreme temperature cycling and ponding water exposure.
Ceramic granules provide impact resistance and additional solar reflectance. Creates a walkable surface for maintenance access.
SPF VS. EVERY
ROOFING SYSTEM
| METRIC | SPF + SILICONE RECOMMENDED | TPO / PVC | EPDM | BUILT-UP | METAL |
|---|---|---|---|---|---|
| R-VALUE PER INCH | R-6.5 | R-3.5 | R-3.5 | R-3.0 | R-0 |
| SEAMLESS SYSTEM | Yes | No | No | Partial | No |
| TYPICAL LIFESPAN | 50+ yrs | 15-20 yrs | 20-25 yrs | 15-20 yrs | 30-40 yrs |
| TEAR-OFF REQUIRED | No | Usually | Usually | Yes | Sometimes |
| INSTALLATION TIME | 3-4 days | 2-4 weeks | 2-4 weeks | 4-6 weeks | 4-8 weeks |
| RENEWABLE | Yes (recoat) | No | No | No | Partial |
Data compiled from DOE, ASHRAE, SPFA, and manufacturer technical specifications. See how SPF performs on your building
THE BOTTOM
LINE
No demolition, no disposal fees, no new decking. SPF applies directly over the existing roof, avoiding the cost of a full tear-off and replacement.
Reduced HVAC loads from superior insulation and solar reflectance translate directly to lower utility bills. Savings compound annually as energy costs rise.
SPF restoration can reset your roof to new-roof insurance classification. Building owners may see premium reductions when coverage shifts from ACV back to RCV after SPF installation.
Seamless membranes eliminate the #1 source of roof failures: seam and flashing leaks. Routine recoating every 15-20 years extends the system indefinitely.
BACKED BY A
FORTUNE 100
Base Sherwin-Williams material and labor warranty included with every SPF installation. Covers defects in materials and workmanship.
Enhanced coverage with annual inspection requirements. Includes full material replacement and labor for any warranty-covered issue.
Our most comprehensive warranty. Backed by Sherwin-Williams Fortune 100 financial strength. Renewable with periodic silicone recoats every 15-20 years.
Every Pinnacle installation undergoes independent inspection by Sherwin-Williams before the warranty certificate is issued. Your coverage is backed by one of the largest coatings manufacturers in the world, not just our word.
Pinnacle is factory-trained and certified by Sherwin-Williams to apply their premium SPF and silicone coating systems. Every installation is independently inspected before warranty issuance.
Full OSHA compliance on every job site. Our crews maintain current certifications in fall protection, hazard communication, and respiratory protection.
RESEARCH DOCUMENTATION.
Third-party sourced data sheets ready to print or save as PDF. Share with property managers, insurance carriers, and decision-makers.
Silicone Restoration Reference
The performance case for silicone roof restoration coatings. UV stability, ponding water resistance, lifecycle cost analysis, and 8 real-world case studies with third-party sources.
SPF Data Reference Sheet
The performance case for SPF roofing with silicone topcoats. R-6.5/inch thermal value, energy savings data, structural integrity, and 9 case studies including Texas A&M’s 40-year program.
READY TO SEE THE
SCIENCE IN ACTION?
Schedule a free thermal drone inspection and get a comprehensive roof assessment backed by the same science and data you have seen on this page. The drone does the inspection, you get the report, and you decide if you want to move forward.