The Performance Case for SPF Roofing with Silicone Topcoats
Third-party research summary for commercial building owners & property managers
■SPF delivers R-6.5 per inch — the highest R-value per inch of any commercial roofing insulation available.
Source: SPFA (Spray Polyurethane Foam Alliance); Technical Bulletin
■Continuous insulation eliminates thermal bridging at fasteners and seams, which can degrade effective R-value in mechanically attached systems by 10-30% under typical conditions (up to 48% at highest fastener densities in corner/perimeter zones).
Source: Singh, Gulati, Ravi & Bhandari (ORNL-affiliated), Buildings journal, 2016; OSTI.gov/biblio/1337037
■Silicone coatings are UV-inert — they do not oxidize, chalk, or degrade from UV exposure the way acrylics and urethanes do. Zero UV-driven tensile strength loss over a 20-year test cycle.
Source: ASTM G154 / Sherwin-Williams Uniflex product testing data
■Silicone coatings exhibit initial elongation of 200-500%+ (product-dependent), accommodating thermal expansion and contraction. Silicone retains elastomeric properties far longer than acrylics or urethanes.
Source: Sherwin-Williams Uniflex Silicone 44 Technical Data Sheet; ASTM D412
■Ponding water does not degrade silicone — it is the only coating type rated for sustained ponding exposure.
Source: SPFA; Coating & Waterproofing Institute
■Buildings in IECC Climate Zone 5A (Northeast Ohio) can achieve 15–30% reduction in HVAC energy costs after SPF roof installation, per ORNL Roof Savings Calculator modeling methodology.
Source: ORNL / DOE Roof Savings Calculator; LBNL Building Energy Studies
■The building envelope accounts for approximately 30% of primary energy in commercial buildings. Air leakage alone can represent up to 40% of heating/cooling energy loss (DOE/ENERGY STAR).
Source: DOE Better Buildings; ENERGY STAR
■Case study: Ford Motor Company (Sheldon Road plant, Plymouth Twp., MI) documented a 53% reduction in total annual energy costs post-SPF installation ($876K to ~$412K).
Source: Plant engineer M.M. Forester testimonial; industry documentation
■An SPF + silicone system is indefinitely renewable: a recoat of silicone (every 10–15 years) restores the system to like-new condition for roughly 20–30% of full replacement cost.
Source: NRCA Roofing Manual; SPFA Best Practices Guide
■Lifecycle cost analysis consistently shows SPF systems deliver lower 30-year cost-of-ownership than single-ply membranes (TPO, EPDM, PVC), which require full tear-off and replacement at end of service life.
Source: NRCA Roofing Manual; SPFA Best Practices Guide
■No tear-off means no landfill disposal cost. SPF is applied over existing substrate, eliminating $1–3/SF in tear-off and haul-away fees. Over 20 billion lbs of roofing waste enters U.S. landfills annually.
Source: SPFA Environmental Impact Bulletin; U.S. EPA roofing waste estimates
■SPF is a closed-cell foam that actively repels water infiltration and adds measurable structural rigidity (150-300% increase in wind uplift resistance vs. mechanically fastened systems).
Source: SPFA Technical Bulletin; independent structural testing
■NIST Technical Note 1476 (2006) documented that SPF roofs on Gulf Coast buildings survived Hurricane Katrina intact while mechanically fastened membrane systems failed. RICOWI investigation teams (2007) corroborated these findings across 2M+ SF of closed-cell SPF.
Source: NIST TN 1476, June 2006; RICOWI Hurricane Katrina Investigation Report, Sept. 2007
■White silicone topcoats achieve Solar Reflectance Index (SRI) of 107+ — exceeding ENERGY STAR and LEED cool roof thresholds.
Source: Cool Roof Rating Council (CRRC) rated product directory
■CRRC-rated silicone systems qualify buildings for LEED credits, potential utility rebates, and reduced urban heat island penalties.
Source: U.S. Green Building Council; ENERGY STAR Roof Products Program
REAL-WORLD CASE STUDIES
SPF + silicone performance across building types, climates, and ownership scenarios
Mercedes-Benz Superdome
During Hurricane Katrina (2005), the Superdome’s EPDM membrane was catastrophically destroyed, with approximately 80% of the membrane peeling away. During the facility’s $336M restoration, SPF was selected as the replacement roofing system. Separately, NIST Technical Note 1476 (2006) documented that SPF roofs on other Gulf Coast buildings survived Katrina intact while mechanically fastened membrane systems failed, with only ~1% damage observed on examined SPF roofs.
Source: NIST TN 1476, June 2006; RICOWI Hurricane Katrina Investigation Report, 2007; IRC Project Profile (Superdome re-roofing)
Tesla Gigafactory Texas (Giga Texas)
GreenSeal 3.0 closed-cell SPF was applied across over 3.5 million square feet of roof while robotic manufacturing equipment was being installed simultaneously on the floors below. Crews managed moving roof penetrations daily to maintain a watertight building envelope throughout construction — a feat impossible with mechanically fastened membrane systems. SPF’s seamless, self-flashing nature around complex penetrations was the only practical solution at this scale and pace.
Source: RoofersCoffeeShop Project Profile; Giga Texas construction documentation
MSG Sphere at The Venetian
SPF was selected over the original PVC membrane specification for the Sphere’s complex curved geometry. The spray-applied system eliminated an estimated 80 semi-loads of rigid insulation and 20-25% material waste that sheet goods would have generated on compound curves. Ultra-Thane 230 closed-cell SPF was used for the application.
Source: CoatingsPro Magazine, March 2026; SprayFoam Magazine
Ford Motor Company — Sheldon Road Plant
The ~900,000 SF Sheldon Road facility was reroofed with SPF starting in 1989. Plant engineer M.M. Forester documented annual energy bills dropping from $876,000 to approximately $412,000, a 53% reduction in total energy costs. The insulation upgrade eliminated significant thermal bridging present in the prior metal deck + fiberglass batt assembly.
Source: M.M. Forester (Ford Plant Engineer) testimonial; industry documentation
Texas A&M University — 40+ Year SPF Campus Program
In the 1970s, Texas A&M’s traditional tar-and-gravel built-up roofing (BUR) systems were failing after an average of just five years, with leaks that were nearly impossible to locate and repair. Beginning in 1980, the university’s Physical Plant Department — under Gerald Scott, P.E. — began systematically reroofing 27 campus buildings with SPF, monitoring energy performance on each building for four years. The results established one of the most-cited benchmarks in commercial roofing: the full cost of SPF installation was recovered through energy savings alone in an average of 4.5 years. The university has since expanded its SPF program to over 7 million square feet across campus. Roofs installed in the early 1980s remained leak-free and performing after 30+ years with only routine recoating — a longevity record no BUR, TPO, or EPDM system installed in the same period came close to matching. The university continues to specify a minimum of 2 inches of SPF with a silicone topcoat as its standard roofing system today.
“From the time of their construction, and throughout the life of the roof, built-up roofs were major maintenance and repair items. 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 University Physical Plant Department
Source: Texas A&M University Physical Plant Department energy monitoring study, 1980–1994; SPFA / Choice Roof Contractor Group published documentation
All data points are derived from independent third-party research, industry technical bulletins, and peer-reviewed studies. Actual performance varies based on building characteristics, existing substrate condition, climate exposure, and application quality. Pinnacle Roofing Systems provides this reference for informational purposes. Contact us for a site-specific assessment and no-obligation roof analysis.
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