silicone-roof-coating in Cleveland, OH

Does Your Cleveland Roof Qualify for Silicone Coating?

Insulation moisture content is the first qualification. We pull moisture cores across the roof — minimum 5 cores on a roof under 20,000 square feet, 8 to 10 cores on larger systems. If less than 15% of the insulation reads wet, the roof is a coating candidate pending the other qualifications. If 15 to 25% reads wet, coating over targeted insulation replacement at wet zones is sometimes viable, depending on the wet zone distribution and the deck condition underneath. Over 25% wet, coating is not the correct scope — we will tell you that directly.

Slope is the second qualification. Silicone coatings perform in ponding water — that is one of their advantages over acrylic and polyurethane coatings — but they are not designed for roofs where the low points never drain. Cleveland commercial buildings from the 1970s and 1980s were often built with minimal slope, and 40 years of insulation compression has created even flatter drainage profiles than the original design. We measure drainage patterns and identify any zones where water is likely to stand for more than 48 hours after a rain event. Those zones require tapered insulation correction before coating or disqualify that section from coating entirely.

Existing membrane structural condition is the third qualification. Silicone bonds to TPO, EPDM, modified bitumen, BUR, and metal substrates — but only if the existing membrane is structurally continuous. Delaminated seams, open lap joints, and exposed substrate through splits or punctures are not candidates for coating-over. They require repair or splice before coating proceeds. We document every open condition on the pre-coating inspection and include the repair scope in the coating proposal so the building owner has a complete cost picture.

Flashing condition is the fourth qualification. Parapet flashings, curb flashings, and penetration flashings that are delaminating will continue to delaminate after coating if the underlying failure mechanism — freeze-thaw cycling, adhesive bond loss, mechanical damage — is not addressed. We repair failed flashings before coating and include flashing repair in the project scope.

Silicone Coating in Cleveland's Climate

Silicone's performance in Cleveland's climate has a specific profile that differs from the manufacturer marketing language. On the positive side: silicone handles UV exposure better than acrylic coatings, retains flexibility at -15°F better than most competitive products, and genuinely resists ponding water rather than degrading under it. These are real advantages in Northeast Ohio's climate envelope.

On the constraint side: silicone application requires a minimum substrate temperature of 40°F and a 24-hour window without rain or frost after application. Cleveland's April, October, and November windows are constrained by these requirements. A coating project scoped for October installation in Cleveland carries meaningful weather risk — lake-effect events can arrive with 90 minutes of notice and the application window closes immediately. We schedule coating projects with primary and backup application dates and do not coat when the 24-hour weather forecast shows precipitation probability above 20%.

Silicone is not re-coatable with most non-silicone products. Once a Cleveland commercial roof has a silicone coating applied, the next restoration cycle must also be silicone — acrylic and polyurethane coatings do not bond reliably to cured silicone without specific preparation. We document this in writing on every coating project so the building file is clear for the next owner or the next contractor.

The warranty path for silicone coating systems — typically 10 to 15 years from the major manufacturers — requires that the substrate preparation, primer application, and mil thickness be documented and submitted to the manufacturer for warranty registration. We handle this submission on every project and include the warranty registration documentation in the project closeout package.

Application Process and Closeout

Pre-application: All open membrane conditions repaired and documented. Flashings re-embedded or replaced at delaminated locations. Drains cleared and drain surrounds sealed. Surface cleaned — BUR and modified bitumen substrates typically require pressure washing to remove the chalking and oxidized surface that inhibits coating adhesion. TPO and EPDM substrates require solvent wipe and primer application per manufacturer specification.

Application: Primer coat applied at manufacturer-specified rate and allowed to cure to tack-free state before topcoat. Silicone topcoat applied in the mil thickness required by the warranty tier — typically 20 to 30 dry mils total for a 10-year warranty system. Flashings receive reinforcing fabric embedded in the first coat of silicone at all vertical-to-horizontal transitions before topcoat.

Closeout: Mil-thickness readings documented with a wet-film gauge at application and a dry-film gauge after cure. Photo documentation of all pre-coating repairs, primer application, and topcoat application. Manufacturer warranty registration submitted with closeout package. The building owner receives a roof zone diagram with all photos keyed to it and the warranty certificate.

Find out if your Cleveland roof qualifies for silicone coating.

We will pull moisture cores, measure drainage patterns, inspect the existing membrane, and give you a written yes-or-no with the qualification basis — before we recommend coating or anything else.

Frequently Asked Questions