When a Fort Worth commercial flat roof has a sound substrate but a weathered or failing surface, silicone restoration adds 10 to 20 years of service life at roughly 40 to 60 percent of replacement cost — if the substrate qualifies and the prep is done right.

Silicone fluid-applied restoration is one of the most frequently misrepresented services in the commercial roofing market. Every spray-and-pray contractor in Fort Worth will sell you a coating. We only recommend it when the substrate qualifies, and we will tell you directly when it does not.

The qualification criteria are not complicated: the existing membrane must be substantially intact, the seams must be in serviceable condition after repair, the insulation must be dry at core pulls across the full roof area, and the deck must be sound. When those four conditions are met, silicone coating is a legitimate capital-preservation tool. It restores the waterproofing surface, adds a reflective white finish that reduces building cooling load, and resets the warranty clock at a fraction of replacement cost. When those conditions are not met — particularly when insulation is wet — coating is money wasted on a problem that will continue underneath the new membrane.

We are licensed and credentialed applicators for the major silicone coating manufacturers: GE Silicones, Tremco, Sherwin-Williams Firetex, and Carlisle Coatings and Waterproofing. Each manufacturer's warranty program has different substrate requirements, mil-thickness requirements, primer requirements, and inspection protocols. We match the manufacturer's program to the building's substrate and the owner's warranty term goal.

Substrate Preparation — Where Most Coatings Fail

A silicone coating applied over inadequate surface preparation will delaminate within two to three years. The substrate must be clean, dry, and free of contaminants — oil, grease, silicone release agents from prior coatings, and the chalky oxidation layer that forms on aged TPO and EPDM all interfere with adhesion. We pressure-wash at a minimum of 2,500 PSI, clean oil-contaminated areas with solvent wipe, and allow the substrate to dry fully before any primer or coating application.

Seam repair on TPO and single-ply substrates is required before coating. Failed seams, open laps, and fishmouths are repaired with heat-welded reinforcing strips on TPO or with cured compatible tape on EPDM. Every seam is probed after repair and before coating application. Coating over a failed seam does not fix the seam — it hides it until the water migration under the coating causes the repair to fail.

Flashing repair is similarly required before coating. Parapet cap flashings, drain flashings, curb flashings, and pipe boots are inspected and repaired before the coating system is applied. Silicone coatings can bridge minor surface cracks but cannot compensate for failed three-dimensional flashing geometry. We document every flashing repair in the pre-application photo log.

Primer Systems and Mil Thickness — Warranty Requirements

Most manufacturer silicone coating warranties require a primer coat before the silicone application. The primer varies by substrate: EPDM requires a solvent-based primer that chemically etches the EPDM surface; aged TPO requires a primer formulated for weathered thermoplastic substrates; BUR surfaces require an asphalt emulsion prime coat or a fibrated aluminum primer depending on the bitumen type. Skipping the primer voids the manufacturer's adhesion warranty — period.

Mil thickness drives warranty term. A 20-mil wet film application (approximately 16-18 mils dry) typically carries a 10-year warranty. A 30-mil wet film application (approximately 24-26 mils dry) carries a 15-year warranty. A 40-mil wet film application (approximately 32-34 mils dry) carries a 20-year warranty. The wet film application must be measured during application with a wet mil gauge — not estimated after the fact. We document wet mil readings across the full roof area at intervals specified by the manufacturer's quality control plan.

Fort Worth summer heat complicates application scheduling. Silicone coatings must be applied within manufacturer-specified ambient and surface temperature ranges — typically 40°F to 100°F ambient with a dew point at least 5°F below ambient. July and August roof surface temperatures in Fort Worth regularly exceed 150°F before 9 AM. We schedule coating applications for early-morning windows from April through October and target the full-day application window from November through March.

When Coating Doesn't Make the Cut

We decline coating projects when moisture-core results show wet insulation in more than 15 percent of pulls. Wet insulation under a new silicone membrane continues to degrade the membrane above it through vapor pressure and freeze-cycle expansion. The coating will develop blistering and adhesion failures within two to three years regardless of application quality.

We also decline coating over existing silicone-coated roofs where the prior coating application was substandard. Silicone does not bond reliably to cured silicone without a bonding primer, and many of the budget-grade silicone coatings applied by storm-chasing contractors across Fort Worth during the 2017 and 2019 hail seasons did not use the correct primer system. When we inspect a roof that has been previously coated, we test adhesion before recommending recoating. If the prior coating is delaminating, the delaminated areas must be removed before a new system can be applied.

For roofs that do not qualify for coating — wet insulation, failed substrate, delaminated prior coatings — we produce the replacement scope and explain exactly why the coating path is off the table. The explanation is in writing, with the core-pull results and the adhesion test results attached.

Wondering whether your Fort Worth commercial roof qualifies for silicone restoration?

We will pull moisture cores, document the substrate condition, and give you a written coating eligibility assessment — with the core data and the cost comparison against full replacement.