Silicone Roof Coating in New Jersey — Tri-Built 985 System

If your flat roof is aging but structurally sound, a silicone roof coating can add 15 to 20 years of waterproof protection without the cost, waste, or disruption of a full tear-off. At Gaby Roofing Flat Roof Specialist, we install the Tri-Built 985 Silicone Roof Coating System — a high-solids, moisture-cure silicone that outperforms acrylics and urethanes in the ponding-water conditions that define North Jersey flat roofs.

Licensed in New Jersey (NJHIC #13VH11705800) and rated 4.9 stars across 140+ reviews, we specialize exclusively in flat and low-slope roofing across Union City, Jersey City, Hoboken, North Bergen, West New York, and Bayonne. Silicone coating is one of the most cost-effective tools in our arsenal — when it is the right fit for the building.

Why Tri-Built 985 Silicone?

There are dozens of silicone coatings on the market. We selected Tri-Built 985 after testing multiple systems on Hudson County rooftops because it solves the specific problems our climate creates:

• Ponding water resistance — Unlike acrylic coatings that re-emulsify when submerged, silicone does not absorb water. Period. In a county where clogged drains and low-slope conditions create standing water after every rainstorm, this is not optional — it is the baseline requirement.
• High-solids formula (90%+) — Tri-Built 985 contains over 90 percent solids by volume. That means the coating you see on day one is essentially the coating you get long-term, with minimal shrinkage as solvents evaporate. Lower-solids products can lose 40 to 50 percent of their film thickness after curing.
• Energy Star reflectivity — The white silicone surface reflects up to 85 percent of solar radiation, dramatically reducing rooftop temperatures. On Hudson County’s tightly packed row homes where attic insulation is often inadequate, this translates directly to lower summer cooling bills and reduced thermal stress on the membrane beneath.
• UV stability — Silicone does not chalk, crack, or become brittle under UV exposure the way urethane coatings do. In New Jersey’s four-season climate with intense summer sun and winter freeze-thaw, UV stability determines whether a coating lasts 10 years or 20.
• Single-component, moisture-cure — No mixing, no pot-life concerns. The coating cures by reacting with ambient moisture, which means it can be applied in higher humidity conditions than many competing systems — a real advantage during New Jersey’s humid summers.

When Silicone Coating Makes Sense

Silicone coating is not a universal solution. It works best when specific conditions are met:

• The existing roof membrane (modified bitumen, EPDM, TPO, BUR, or metal) is structurally intact with no saturated insulation beneath.
• Fewer than 25 percent of the surface has active defects — applying our 25 percent repair-or-replace rule.
• The building owner wants to extend roof life without the full cost of tear-off and replacement.
• Ponding water is present but manageable (silicone handles it; acrylics cannot).

When a roof fails these criteria — saturated insulation, widespread membrane failure, or structural deck issues — a full flat roofing replacement with torch-down modified bitumen or a new single-ply system is the honest recommendation. We will never sell a coating job when the roof needs replacement.

Silicone Coating vs. Torch-Down vs. Full Replacement

Understanding your options is critical to making the right investment:

• Silicone coating ($4–$7/sq ft installed) — Best for sound roofs that need waterproofing renewal. No tear-off, minimal disruption, 15–20 year expected life. Cannot fix structural problems.
• Torch-down modified bitumen ($8–$14/sq ft installed) — Best for roofs that need full membrane replacement. Firestone torch-down systems provide a multi-layer, heat-welded membrane. Requires tear-off to deck in most cases.
• Full replacement with insulation ($12–$20/sq ft installed) — Required when decking and insulation are compromised. New tapered insulation corrects drainage, new membrane goes on top. Highest cost but addresses root-cause problems.

Our Silicone Coating Installation Process

1. Roof survey and core cuts — We take moisture readings and cut test cores to confirm the insulation beneath is dry. If cores reveal saturated insulation, we stop and recommend replacement rather than coating over a failing system.
2. Surface preparation — Pressure washing removes dirt, debris, biological growth, and old coatings that would prevent adhesion. All seams, penetrations, and defects get reinforced with silicone caulk and polyester fabric.
3. Primer application — Where substrate conditions require it, we apply a bonding primer compatible with the existing membrane type.
4. Silicone application — Tri-Built 985 is spray-applied or roller-applied in two passes to achieve a minimum 20-mil dry film thickness across the entire roof surface. We measure wet-film thickness continuously during application.
5. Detail work — All flashings, curbs, penetrations, drains, and parapet walls receive additional silicone build-up with fabric reinforcement at transition points.
6. Final inspection and documentation — Thickness readings are taken at multiple points. Photos document every stage. The building owner receives a complete project file.

Silicone Roof Coating Cost

Installed cost for a Tri-Built 985 silicone coating system in Hudson County typically runs $4 to $7 per square foot. Variables include roof size, condition of the existing substrate, number of penetrations, and required prep work. A 2,000 sq ft row-home roof generally falls between $8,000 and $14,000 fully installed. We provide detailed, transparent proposals with every line item visible.

Frequently Asked Questions

How long does a silicone roof coating last?

A properly installed Tri-Built 985 system at 20+ mil thickness typically lasts 15 to 20 years. At that point, the surface can be cleaned and recoated for another cycle without tear-off — one of silicone’s biggest long-term advantages.

Can silicone coating be applied over a torch-down roof?

Yes. Silicone adheres well to modified bitumen (torch-down) surfaces after proper cleaning and priming. This is one of the most common applications we perform in Hudson County, extending the life of aging torch-down roofs by 15+ years.

Does silicone coating handle ponding water?

Silicone is the only coating chemistry that does not degrade under ponding water. Acrylic coatings re-emulsify and urethanes can blister. If your flat roof ponds, silicone is the only coating option we recommend.

Is silicone coating Energy Star rated?

Yes. White silicone coatings including Tri-Built 985 meet Energy Star reflectivity requirements. The high solar reflectance reduces roof surface temperatures by up to 50°F compared to a dark membrane, lowering cooling costs significantly.

What happens if the coating gets damaged?

Silicone is easily repairable. Punctures or mechanical damage from foot traffic or dropped tools can be patched with additional silicone and fabric reinforcement — a 30-minute repair that restores full waterproofing.

Schedule Your Free Silicone Coating Assessment

Stop paying for temporary patches on a roof that could be permanently sealed. Call Gaby Roofing at 201-638-8556 for a free roof assessment to determine if silicone coating is the right solution for your building. We serve all of Hudson County — see our service areas for a complete list. Already know your flat roof needs more than a coating? Explore our full flat roofing services.