Silicone Roof Coatings
Restore & Protect Commercial Roofs

What Is a Silicone Roof Coating?

A silicone roof coating is a liquid-applied, high-solids elastomeric membrane. It is rolled or sprayed onto a prepared roof surface and cures into a continuous, rubber-like layer with no seams. Silicone is moisture-cured and naturally resistant to ponding water, which makes it a common choice for flat and low-slope commercial roofs.

A coating is not a standalone roof — it is a restoration system installed over an existing, structurally sound roof. The coating's performance depends almost entirely on how well the existing roof is cleaned, repaired, and primed before the silicone is applied.

What Types of Commercial Roofs Can Be Coated?

Coatings can be applied over several existing roof types when the substrate is sound and properly prepared. Common candidates include:

• Aged smooth TPO and EPDM membranes (with correct primer and preparation)
• Standing-seam and corrugated metal roofs
• Smooth built-up roofing (BUR)
• Modified bitumen (smooth, granular surfaces may require specific preparation)
• Concrete and some smooth-surface roof decks

Can Silicone Coating Be Installed Over an Existing Metal Roof?

Yes — metal roofs are among the most common candidates for silicone restoration. As a metal roof ages, fasteners back out, seams open, panels rust, and coatings chalk. A silicone restoration system can seal seams, encapsulate fasteners, and create a seamless, reflective membrane over the existing panels.

Preparation matters: rust is treated, loose fasteners are reset or replaced, seams and penetrations are reinforced with fabric or sealant, and the surface is cleaned before the coating is applied. The existing metal panels must be structurally sound — a coating cannot fix rotted or badly corroded decking.

Can TPO or EPDM Roofs Be Restored Instead of Replaced?

Often, yes. If the existing membrane is still intact and the insulation below is dry, a coating system can restore a TPO or EPDM roof and add years of service life without the cost and disruption of a tear-off.

The deciding factor is the condition of the membrane and whether moisture has infiltrated the insulation. We inspect, identify any wet insulation, and repair those areas before coating. A roof with widespread wet insulation or a membrane at the end of its life is usually better replaced.

How Seams, Penetrations, Flashing & Fasteners Are Treated

Coatings only perform when weak points are reinforced first. Before applying the silicone, we address every point where water typically enters:

• Seams are cleaned and reinforced with fabric reinforcement or seam sealant
• Loose or backed-out fasteners are reset or replaced and sealed
• Penetrations — vents, pipes, HVAC curbs, drains — are flashed and sealed
• Edge metal and flashing are inspected, re-secured, and sealed as needed
• Rust on metal roofs is treated before coating

Cleaning & Preparation

Preparation is the most important part of a coating job. The roof is power-washed or otherwise cleaned to remove dirt, algae, chalk, and debris so the coating bonds to the surface, not to contamination. Any repairs — patches, wet insulation replacement, rust treatment — are completed first. A primer is applied where the coating system or substrate requires one.

Skipping or rushing preparation is the most common reason coatings fail early. We do not coat a roof that has not been properly prepared.

Is Your Roof a Good Candidate for Restoration?

A roof is a strong candidate for a coating or restoration system when:

• The existing membrane or metal panels are structurally sound
• Insulation is dry (confirmed by inspection / moisture survey)
• Leaks are at seams, fasteners, penetrations, or flashing — not widespread
• The roof has adequate drainage or drainage can be improved
• The building owner wants to extend roof life without a full replacement

When to Replace Instead of Coat

Replacement is usually the better choice when:

• Insulation is saturated across large areas
• The membrane is at the end of its service life and breaking down
• The roof deck is rotted or structurally compromised
• There is widespread blistering, buckling, or membrane failure
• The building owner wants a brand-new warranty from a membrane manufacturer

Restoration vs. Full Replacement

A coating or restoration system is generally faster, cleaner, and less expensive than a full tear-off and replacement, and it adds a reflective surface that can reduce cooling load. A full replacement costs more and creates more disruption, but it is the right answer when the existing roof is no longer sound.

The two are not interchangeable — one solves a restoration problem, the other solves an end-of-life problem. The inspection tells us which problem you actually have.

Identifying Leaks Before Coating

We identify active leaks before coating so they can be repaired at the source. A coating applied over an active leak will not fix it — water will travel beneath the new membrane. Inspections may include a visual survey, moisture readings, and tracking of interior stains back to entry points on the roof.

Maintenance After Coating

A coated roof still needs maintenance. We recommend periodic inspections to check seams, penetrations, and drainage, to clear debris, and to address any new punctures or damage. Recoating is an option in the future when the original coating reaches the end of its service life.

Ponding Water & Commercial Roofing

Ponding water is a common issue on flat commercial roofs. Silicone coatings are generally more tolerant of standing water than acrylic coatings, which is one reason they are widely used on low-slope roofs. Even so, persistent ponding should be addressed — improving drainage or slope extends the life of any roof system, coated or not.

How Long Can a Coating System Last?

The service life of a silicone coating system depends on the quality of preparation, the system used, roof traffic, climate exposure, and ongoing maintenance. We don't quote a single number because every roof is different. An inspection lets us give you a realistic expectation for your specific building and conditions.

Factors That Affect Cost

The cost of a silicone coating project depends on several factors:

• Roof size and accessibility
• Existing roof type and its current condition
• Amount of preparation and repair required before coating
• Coating system and number of coats specified
• Number of seams, penetrations, and flashing details to reinforce

Why Inspect Before Choosing a Coating System

A coating is only as good as the roof beneath it. An inspection confirms whether your roof is a candidate, identifies hidden moisture, and lets us specify the right preparation and system. Scheduling a coating without an inspection is how building owners end up coating a roof that needed to be replaced.