Commercial Roofing · Restoration
Silicone Roof Coating for Phoenix Commercial Buildings
Your aging commercial roof may not need replacement — it may need restoration. Silicone roof coating with TRI-BUILT Roof X-Tender 985 Super Silicone seals an existing sound roof into a seamless, monolithic membrane, extending its service life 10–20 years for a fraction of the cost of a full tear-off and replacement. No tear-off, no tenant disruption, and an indefinitely ponding-resistant surface built for the Arizona desert.
The Right Call
When silicone restoration is the right call
Every month a property manager calls us with the same problem: the existing commercial roof is 12–18 years old, shows visible wear, maybe some minor ponding — but it isn't leaking yet. A competing contractor has already quoted a six-figure tear-off and replacement. For roughly 60% of those roofs, there's a smarter path: silicone restoration. When the roof qualifies, it's almost always the better economic decision.
Silicone coating is the right call when your existing roof — TPO, EPDM, modified bitumen, BUR, metal, or aged spray foam — is structurally sound, dry, and free of widespread saturation. The leaks have to be coming from worn topcoat, failed flashings, or penetrations rather than the membrane itself, and the deck underneath needs to be solid. When those conditions are met, a properly applied silicone membrane resets the clock for a fraction of replacement cost.
- Existing roof is structurally sound with a dry, solid deck
- Leaks trace to topcoat, flashings, or penetrations — not the membrane
- Less than 25% of the membrane is failing
- You want a 10–20 year extension, not a 25-year reset
- Building must stay operational — no tear-off, no tenant disruption
If 25% or more of the membrane is failing, the insulation is wet, or the deck is compromised, coating just delays an inevitable replacement by a few years. We tell you honestly when restoration isn't the right call — that costs us the sale, but it saves you from paying twice. Read the full breakdown in our silicone roof coating guide, or see how it fits beside foam and TPO in our complete Phoenix commercial roofing guide.
Find Out If Your Roof QualifiesThe System
What we install — TRI-BUILT Roof X-Tender 985 Super Silicone
We specialize in TRI-BUILT Roof X-Tender 985 Super Silicone, a premium fluid-applied silicone roof coating engineered specifically for the conditions that destroy lesser coatings in Phoenix. It's a moisture-cure, solvent-free, high-solids silicone with Pond-Proof Technology — built to outperform asphaltic, acrylic, urethane, and thermoplastic coatings on commercial roofs in our climate.
98% Solids — Almost Nothing Evaporates Off
At 98% solids, nearly everything that goes on the roof stays on the roof as the finished membrane. That high solids content is exactly why Roof X-Tender 985 outperforms acrylic and urethane on Phoenix-area buildings, where surface temperatures regularly exceed 160°F and UV load is brutal year-round.
Pond-Proof Technology
Silicone holds up to ponding water far better than acrylic — a real advantage in Phoenix, where monsoon rain hits roofs whose drainage was designed for our annual average, not three inches in 90 minutes. Roof X-Tender 985's Pond-Proof chemistry won't re-emulsify under standing water the way acrylic does.
0.90 Reflectivity · SRI 115
White silicone bumps roof reflectivity dramatically — a 0.90 initial solar reflectance and SRI of 115. That qualifies most properly applied restorations as Cool Roofs under U.S. Department of Energy guidance, with energy savings of up to 30% (results vary by building).
Up to 20-Year Warranty
Properly specified Roof X-Tender 985 installations carry manufacturer warranties up to 20 years depending on mil thickness and inspection tier. We deliver the full documentation package — moisture scan, adhesion test results, application records, and warranty registration — which lenders and insurance carriers often require for risk underwriting.
Moisture-cure, solvent-free chemistry. Roof X-Tender 985 cures by reacting with atmospheric humidity rather than flashing off solvents, which means a tougher, more elastic membrane and a cleaner installation for occupied buildings. Sprayed or rolled over a properly prepared substrate, it cures into a seamless, monolithic, waterproof surface bonded directly to the existing roof — no seams, no fasteners, no tear-off. The existing roof stays in place; the silicone becomes the new weather surface. For the broader family of restoration coatings we install, see our roof coating systems page.
Cost Factors
What drives silicone coating cost in Phoenix
Pricing depends on roof size, condition and system. Request a free inspection for an exact quote. The biggest cost drivers are roof size, existing condition, how much repair and prep the roof needs, the system and coating thickness, access, and the warranty tier. For general Arizona industry ranges, see our 2026 commercial roof replacement cost guide.
Real example: at our Lofts on Fillmore HOA restoration in downtown Phoenix, the restoration was completed with a 10-Year No Leak Warranty. For full system-by-system pricing context, see our 2026 commercial roof replacement cost guide.
Before We Coat
Our 6-point pre-coating inspection
Silicone restoration only works on roofs that qualify. Coating a failing roof just buys a short delay before a much bigger problem. Every Vanguard Roofing pre-coating inspection covers these six checks before we'll quote the job.
Moisture scan of the entire roof
We use infrared or capacitance moisture scanning to find wet insulation under the existing membrane. Any saturated areas must be cut out and replaced before coating — you cannot trap water beneath silicone. We core-sample suspect areas to confirm before pricing the replacement scope.
Adhesion testing
Silicone has to bond to whatever it's coating. We run small test patches with the actual primer and base coat to confirm adhesion on aged TPO, weathered EPDM, oxidized modified bitumen, or chalky existing coatings. If the substrate won't hold, we change the prep spec before quoting the full job.
Structural and substrate condition
We walk the deck and check for soft spots, sagging insulation, deck rot, deflection between joists, and structural movement. Coating doesn't fix structure. If the deck or framing has issues, those get repaired first — and if the problems are widespread, replacement is the honest call.
Seam, flashing, and penetration audit
Every seam, wall flashing, drain, HVAC curb, and pipe penetration gets inspected and graded. Most need reinforcement with silicone-compatible fabric and detail coating before the field membrane goes on. Sloppy detail work is where bad jobs leak in year 2–3 — our spec includes documented detail work on every penetration with photo records.
Drainage and ponding evaluation
Silicone handles ponding water indefinitely, but ponds deeper than ½–¾" still want correction with tapered insulation crickets or supplemental drains — both for warranty and long-term performance. We map drainage and document ponding zones before application.
Remaining service life assessment
The final question: is there enough sound roof left to make coating worth it? Restoration makes economic sense when the existing system has 8–15 years of remaining life — not 2–3. If 25%+ of the membrane is failing or the insulation is largely shot, we'll tell you honestly that coating only delays an inevitable replacement.
Why Vanguard
Why property managers choose Vanguard for silicone restoration
Silicone is only as good as the contractor applying it. A crew that sprays silicone on a 150°F roof at 1 PM in July delivers a job that fails in year 3. Our family has been roofing in Arizona since 1957 — and we know exactly how to spec, schedule, and document a silicone job that lasts.
Family roofing in Arizona since 1957
Vanguard Roofing — a trade name of MSW Contracting LLC — comes from a family that has been roofing in Arizona since 1957. We've completed over $100 million in commercial projects and 5,000+ roofs installed or restored. We know how Phoenix UV, monsoon, and thermal cycling actually attack a coating — because we've watched it for decades.
Licensed, bonded, and insured in Arizona
We're licensed AZ ROC CR-42 #289663 and R-62 #283025 — both required for legitimate commercial coating work in Arizona. Verify any contractor through the Arizona Registrar of Contractors before you sign. Every silicone project ships with a Certificate of Insurance and license verification delivered before mobilization.
Phoenix-specific application windows
Silicone needs a substrate temperature window (typically below 120°F surface) for proper cure, and 6–12 rain-free hours on the first base coat. We start early — 4–10 AM in summer — and stage application around monsoon storm windows using daily NWS forecasts. Most of our silicone work is booked October–May for exactly this reason.
Full documentation package every job
Moisture scan, adhesion test results, mil-thickness application records, photo-documented detail work, and manufacturer warranty registration — delivered on every silicone restoration. That's the paperwork lenders and insurers look at, and the paperwork HOA boards need to defend a spending decision later.
Real projects
Silicone Coating Projects
Photos, square footage and scope from completed projects.
Case study · Chandler20,000 sq ft silicone recoatSolterra Senior Living: TRC 980 100% silicone with no disruption to residents.See the project →
Case study · Scottsdale10,000 sq ft silicone repair and recoatScottsdale Airpark: cracks and bubbles repaired, then a MuleHide 100% silicone topcoat.See the project →
Case study · Prescott24,000 sq ft retail center silicone recoatA retail center roof restored with a silicone coating system.See the project →
Case study · Scottsdale8,755 sq ft foam repair and silicone recoatRestaurant roof at 116th & Shea: foam repairs followed by a silicone recoat.See the project →FAQ
Silicone Roof Coating Questions
What roofs can be coated with silicone?
Foam, metal, single-ply and many built-up roofs, as long as the roof is dry and the coating passes an adhesion test. Wet areas are removed and repaired first.
Does silicone handle ponding water?
Silicone holds up to ponding better than many acrylic coatings. Ponding should still be fixed where practical, because standing water collects dirt and adds load.
Can silicone be applied while a building is occupied?
Yes. Solterra Senior Living in Chandler was recoated with residents in place.
How long does a silicone coating last?
It depends on thickness, the roof underneath and upkeep. See how long silicone roof coating lasts in Phoenix.
Free commercial roof inspections
Request a Commercial Roof Inspection
Tell us about the building and we will schedule a visit. You get a photo-documented condition report and written options. All commercial roof inspections are free.
- Photo-documented roof condition report
- Written options: repair, restore or replace
- Licensed AZ ROC CR-42 #289663 · insured
- Commercial roofing specialists across the Phoenix metro
Prefer to talk? Call Vanguard Roofing at (602) 818-5791
Mon–Sat 7:00 AM–7:00 PM