How spray foam and silicone stack up against the common commercial systems across the variables that actually matter for your building.
How spray foam and silicone stack up against the common commercial systems across the variables that actually matter for your building.
| Variable | SPF & Silicone | TPO | PVC | EPDM | Modified Bitumen |
|---|---|---|---|---|---|
| Upfront Investment | Moderate | Lower | Higher | Lower | Moderate |
| Wind Uplift Resistance | Exceptional | Good | Good | Fair | Good |
| Waterproofing | Seamless | Welded seams | Welded seams | Glued seams | Multi-ply |
| Insulating Value (R) | R-6.5–7 / in | Membrane only | Membrane only | None | Low |
| Maintenance Demand | Low · recoat | Moderate | Moderate | Moderate | Higher |
| Year-1 Tax Deduction* | Often 100% | Eligible | Eligible | Eligible | Eligible |
| Service Life | 50+ yrs | 15–25 yrs | 20–30 yrs | 15–25 yrs | 15–20 yrs |
| Tear-Off Avoided | Usually none | Often req. | Often req. | Often req. | Often req. |
| Reflectivity / Energy | High | Reflective | Reflective | Low | Low |
| Renewable Without Replacing | Yes · recoat | No | No | No | No |
More filled marks = stronger performance for the building owner. Comparison is general guidance — your roof's actual scope follows the required third-party moisture reading, engineering report, and on-site assessment. *Tax treatment varies; confirm Section 179 eligibility with your CPA.
Why a seamless, fully-adhered foam system outperforms board insulation and mechanically-fastened membranes — especially in a Florida wind zone.
Closed-cell SPF delivers roughly R-6.5–7 per inch as one continuous, seamless layer — no gaps and no thermal bridging. It even adds slope to fix ponding water.
Fully-adhered SPF has tested past the limits of UL equipment and beyond 900 psf in FM pull testing — roughly 7–15× a mechanically-attached membrane. FEMA ranks SPF among the best-performing systems in major storms.
SPF is monolithic. It self-flashes around every HVAC curb, pipe, drain, and parapet — so there are no seams, joints, or fasteners for wind and water to attack.
SPF adds little weight and bonds directly to concrete, metal, BUR, and most existing roofs — usually with no tear-off, no dumpsters, and no exposed deck. A recoat every 10–15 years renews it indefinitely.
A full tear-off means dumpsters, cranes, downtime, and a six-figure invoice. A spray foam & silicone restoration seals your existing roof in place — for a fraction of the cost and disruption.
Restoration is only possible on a sound, dry roof. Any area of insulation reading over 15% moisture must be removed and that section repaired (or foamed back in) before the rest of the roof can be coated. If more than 50% of the roof is holding 15% moisture or higher, the full roof must be torn off and replaced — and an SPF system is an ideal replacement, installed directly over the deck when needed.
Every commercial roof project requires a third-party moisture reading and engineering report before we provide a final price.
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