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Nashville, TN
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A complete guide to roof coating and restoration in Nashville. Silicone, acrylic, and elastomeric systems for metal, TPO, EPDM, and modified bitumen roofs. Commercial coating systems at a fraction of replacement cost, FM Approved, CRRC-rated, with 10 to 20 year warranties. Residential metal roof restoration for homes that need life extended, not replaced. From The Metal Roofers.
Coating is not a Band-Aid. It is not paint. It is not a cosmetic refresh. A properly specified and applied silicone roof coating system is an engineered weatherproofing membrane, tested to ASTM standards, rated by the Cool Roof Rating Council, and capable of performing for a decade or more under Nashville's punishing UV, heat, rain, and freeze-thaw cycles.
How much of the sun's energy the roof surface reflects back into the atmosphere rather than absorbing as heat. Measured on a scale of 0 (absorbs everything) to 1.0 (reflects everything). A standard dark-colored metal roof might have an SR of 0.25–0.40. A white silicone-coated metal roof typically achieves 0.80–0.88 initially and 0.65–0.78 after three years of weathering. Higher is better — more energy reflected means less heat in your building.
How efficiently the roof surface releases (emits) whatever heat it does absorb. Measured on a scale of 0 to 1.0. Most non-metallic surfaces have naturally high emittance (0.85–0.95). Bare metal has low emittance (0.05–0.30). A silicone coating on metal raises the thermal emittance from the metal's natural low value to 0.85+ — meaning the coated surface sheds absorbed heat rapidly rather than conducting it into the building.
The Solar Reflectance Index (SRI) combines both properties into a single number. A standard black surface has an SRI of 0. A standard white surface has an SRI of 100. Cool roof coatings typically achieve SRI values of 90–110+ when new. The higher the SRI, the cooler the roof stays, the less heat enters your building, and the less your HVAC system works to keep the interior comfortable.
Surface temperatures on a 95°F Nashville afternoon with full sun exposure. Approximate values — actual readings vary by roof color, age, orientation, and substrate condition.
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Silicone roof coatings are solvent-based elastomeric membranes whose principal polymer is more than 95% silicone. They cure by reacting with atmospheric moisture, not by water evaporation like acrylics, forming a flexible, rubber-like film that is chemically bonded to the roof surface. Once cured, a silicone coating is fundamentally waterproof. It does not absorb water. It does not soften or re-emulsify in rain. It does not break down from ponding water. And it maintains its UV stability and flexibility for 15–20+ years under Nashville's climate conditions.
Nashville averages 47+ inches of rainfall per year. Low-slope and flat metal roofs — common on commercial buildings and carports — routinely hold standing water after heavy rain events. Acrylic coatings are water-based and will soften, re-emulsify, and eventually fail under ponding water. Silicone is impervious to it. Water can sit on a silicone coating indefinitely without degradation. For Nashville, this single property makes silicone the only responsible choice for any roof that is not perfectly drained.
Nashville sits at 36°N latitude with intense direct sun exposure from May through September. UV radiation degrades most organic polymers over time — causing chalking, cracking, and embrittlement. Silicone's molecular structure (silicon-oxygen backbone rather than carbon-carbon) is inherently UV-stable. It does not chalk, does not become brittle, and maintains its flexibility and reflectivity for the full service life of the coating.
Nashville roof surfaces swing from below freezing in January to 170°F+ in July. That 200°F range requires a coating that stays flexible across the entire spectrum — not one that becomes rigid in cold or soft in heat. Silicone maintains its elasticity from well below 0°F to above 200°F, expanding and contracting with the metal substrate without cracking, splitting, or delaminating.
Because silicone cures by moisture reaction (not water evaporation), it can be applied in a wider range of conditions than acrylic. Silicone does not require temperatures above 50°F. It cures in high humidity — which is most days in Nashville from April through October. Acrylic coatings applied in humid conditions may not cure properly, leading to adhesion failure.
Silicone. Every time. Nashville's rainfall, humidity, and UV intensity make acrylic a poor long-term choice for any roof that cannot guarantee perfect drainage at all times. The higher upfront cost of silicone is offset by a service life 2–3 times longer, fewer recoat cycles, and superior performance under the conditions that actually exist on Nashville roofs. We apply acrylic coatings only on steep-slope residential metal roofs with excellent drainage and no history of ponding, and even then, we prefer silicone for its UV stability and longevity.
On classic panel (exposed fastener) metal roofs, the screws are the primary failure point. Neoprene washers dry out, crack, and lose compression after 15–25 years. Silicone coating encapsulates every fastener head and washer in a continuous membrane, sealing the penetration and preventing water intrusion even after the washer material has degraded.
Metal panel lap joints rely on sealant strips and compression for water resistance. Over time, thermal cycling loosens these joints. Silicone coating with reinforcing polyester fabric bridges these joints, creating a secondary waterproofing layer that flexes with thermal movement rather than fighting it.
Factory-applied paint systems (SMP and PVDF) degrade under UV exposure over decades, fading, chalking, and losing their protective function. Silicone replaces this UV protection with a fresh, high-performance barrier that reflects 80–88% of solar energy and resists UV degradation for 15–20+ years.
White silicone transforms the roof from a heat absorber into a heat reflector. The combination of high solar reflectance (0.80–0.88) and high thermal emittance (0.85+) created by the silicone layer meets or exceeds CRRC cool roof criteria, qualifying for energy code compliance and potential utility incentives.
Quality white silicone coatings typically exceed all of these thresholds by a wide margin — with initial solar reflectance of 0.80–0.88, aged reflectance of 0.65–0.78, and thermal emittance of 0.85–0.92. A silicone-coated metal roof is one of the highest-performing cool roof surfaces available.
The EPA's ENERGY STAR certification program for roofing products ended in June 2022. CRRC ratings are now the primary industry benchmark for cool roof performance and are referenced by building codes, green building programs (LEED, ENERGY STAR for buildings), and utility rebate programs. When evaluating any roof coating product, ask for its CRRC-rated values — specifically the three-year aged solar reflectance and thermal emittance.
The CRRC reports average cool roof energy savings of 7–15% of total cooling costs. For Nashville commercial buildings, particularly those with large roof footprints, limited insulation, and older HVAC systems, the savings can be significantly higher. A 20,000-square-foot commercial building with a dark, uncoated metal roof spending $30,000–$50,000 per year on cooling can reasonably expect $3,000–$7,500 in annual energy savings from a reflective silicone coating. Over a 15-year coating life, that is $45,000–$112,000 in cooling cost reduction, often exceeding the cost of the coating itself.
For residential homes, the impact is proportionally smaller but still meaningful, particularly for homes with limited attic insulation, dark-colored roofs, or HVAC ductwork running through an unconditioned attic. Reducing the heat load that reaches the attic space reduces the temperature differential the insulation must manage and lowers the demand on the air conditioning system.
Moisture trapped beneath metal panels or in underlying insulation shows as distinctly cooler (or warmer, depending on time of day) zones in the thermal image. This reveals failed fasteners, compromised seams, and slow leaks that have been silently saturating insulation for months or years, damage that is invisible from above and often from below until it becomes severe.
Thermal imaging shows where attic insulation has settled, been displaced by HVAC equipment or storage, or has become saturated with moisture. These "hot zones" are where the majority of your cooling energy is being wasted, and they are often localized to specific areas rather than distributed across the entire roof.
A backed-out fastener on an exposed-fastener metal roof conducts heat directly through the panel, and appears as a bright point source in the thermal image. Thermal scans can reveal dozens of compromised fasteners across a roof that look fine from the ground but are thermally compromised and likely admitting water.
We image the roof before coating to document the baseline thermal profile, then image again after coating to show the temperature differential achieved. This gives you, and your insurance company, your building manager, or your accountant, documented, visual proof that the coating is performing as specified. It is the difference between "trust us" and "see for yourself."
We perform thermal scans on every coating project we do, it is included as part of our standard scope, not an upsell or add-on. You receive before-and-after thermal images showing the temperature reduction across your roof, documented with date stamps, ambient conditions, and surface temperature readings. For existing roof inspections (without a coating project), we offer standalone thermal imaging assessments, a powerful diagnostic tool that can reveal problems you cannot see any other way.
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Professional infrared imaging of the entire roof surface, performed during optimal conditions — typically late afternoon or early evening when thermal differentials are most pronounced. We document surface temperature readings across the entire roof area and identify anomalies: hot spots, moisture zones, insulation gaps, and compromised fasteners.
You receive a report with side-by-side thermal and visual images, temperature readings, and annotations identifying every anomaly found. The report explains what each finding means, whether it requires attention, and the recommended course of action. This document is valuable for insurance claims, building management records, and coating project planning.
For coating projects, we image before and after. The before scan establishes the baseline thermal profile and identifies any hidden issues that should be addressed before coating. The after scan verifies the temperature reduction achieved — typically 50–80°F of surface temperature drop. You get documented proof of performance.
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Full visual and thermal inspection of the existing roof. We identify failing fasteners, open seams, damaged flashings, deteriorated pipe boots, rust or corrosion, and any areas of trapped moisture. All issues are documented and addressed before coating begins. We perform adhesion test patches on the existing surface, especially critical on smooth substrates, previously coated roofs, and metal panels, to confirm the silicone will bond properly. If adhesion testing is not satisfactory, we apply a water-based adhesion primer and retest before proceeding.
Failing fasteners are replaced or re-sealed. Open seams are mechanically fastened and sealed. Rust and corrosion are treated. Deteriorated pipe boots and flashings are replaced. The entire roof surface is cleaned using a concentrated roof cleaner formulated for coating preparation, removing dirt, debris, chalk, oxidation, and any contaminants that would interfere with adhesion. The roof must be clean and dry before coating begins.
All penetrations, seams, fastener rows, transitions, and flashing terminations receive detail treatment. We apply non-sag silicone flashing sealant at vertical transitions and self-leveling silicone sealant at horizontal joints and pitch pans. Polyester reinforcing fabric is embedded in wet silicone at stress points and high-movement areas, creating a stronger, more flexible seal at the locations most likely to experience thermal movement and water intrusion. This step is where the craft lives, and where cheap coating jobs skip corners.
The first full coat of high-solids silicone is applied across the entire roof surface by airless sprayer, roller, or squeegee, depending on roof geometry and access. High-solids formulations (90%+ volume solids) mean less material is needed to achieve the required dry film thickness, and the coating can often be applied to full thickness in a single pass without blistering. We target a minimum of 22 dry mils at all inspection points, typically applying at 24–25 wet mils to account for minimal solvent loss.
If roller or brush application is used (which may not achieve full thickness in one pass), a second coat is applied after the base has skinned over and is walkable, typically 4–6 hours in Nashville's humidity. The goal is to bring the total system to the specified dry film thickness and create the final reflective surface. Airless spray application can often achieve full thickness in a single coat, making it the preferred method for large commercial roofs.
In areas of expected foot traffic, around HVAC equipment, access hatches, roof drains, and maintenance routes, we apply a textured walk-pad coating with non-skid granules (crushed recycled glass or similar aggregate). Cured silicone is extremely slippery when wet, and walk pads provide safe footing for future maintenance access. This is a detail that matters every time someone goes up on the roof for the next two decades.
After curing, we perform a final visual inspection and a post-application thermal scan. Mil thickness is spot-checked across the roof to verify coverage. The thermal scan confirms the temperature reduction and documents the cool roof performance for your records. Full physical characteristics develop within 7 days of application at standard conditions. The project is not complete until the numbers match the specification.
We use advanced inspection techniques — thermal imaging, impedance moisture scans, drone imagery, and detailed roof condition reports — to provide an accurate, objective assessment of your roof's condition before recommending any scope of work. If your roof is a good candidate for coating, we will tell you. If it needs replacement, we will tell you that too. The worst outcome for everyone is a $30,000 coating over a roof that needed a $60,000 replacement — because now you need the replacement anyway, plus you have wasted the coating investment.
A 20,000 sq ft commercial metal roof replacement costs $120,000–$200,000+ with tear-off, disposal, and new installation. A silicone coating system on the same roof costs $40,000–$80,000 and delivers 15–20 years of warranted protection. At end of warranty, a maintenance recoat, a thin refresh layer over the existing silicone — costs $15,000–$30,000 and extends the warranty another 10–15 years.
Over 40 years: One replacement + one replacement = $240,000–$400,000. One coating + two recoats = $70,000–$140,000. The building stays operational during every coating application. Zero landfill waste. Zero business disruption.
The majority of silicone coating work in Nashville is commercial. Large flat or low-slope metal roofs, warehouses, manufacturing facilities, retail buildings, churches, schools, office buildings, are ideal candidates. These roofs often have exposed fastener panels, aging sealants, ponding water, and massive surface areas absorbing heat all summer. A silicone coating addresses every one of these issues in a single application.
Commercial coating systems are typically specified as complete systems: concentrated roof cleaner for preparation, adhesion primer where needed, non-sag silicone flashing sealant for vertical details, self-leveling silicone sealant for horizontal joints and pitch pans, high-solids silicone roof coating for the field, walk-pad coating with non-skid granules for traffic areas, and polyester reinforcing fabric for stress points. Professional-grade commercial systems are FM Approved, CRRC-rated, and carry manufacturer warranties of 10–20+ years when installed by certified applicators.
Residential coating work in Nashville is less common but growing. The best candidates are homes with older classic panel (exposed fastener) metal roofs that are structurally sound but experiencing fastener leaks or faded paint. A silicone coating can seal every fastener, restore UV protection, and create a cool roof surface, extending the roof's life by 15+ years at a fraction of replacement cost.
Steep-slope residential roofs drain well (reducing the ponding advantage of silicone over acrylic), but silicone's UV stability, temperature flexibility, and longevity still make it the better long-term investment for Nashville's climate. For homes with standing seam metal roofs in good condition, coating is rarely necessary, the factory-applied PVDF paint system on a quality standing seam roof lasts 30–40+ years. Coating makes the most sense for exposed fastener systems where the fasteners and sealants are the failure points.
High-performance silicone coatings are available in white, gray, tan, and black, as well as premium custom colors for architectural applications. White delivers the highest solar reflectance and cool roof performance. Gray and tan offer a more subdued aesthetic while still providing significant reflectance improvement over dark or faded existing surfaces. Black is used for non-reflective applications where aesthetics require a dark surface. For most Nashville coating projects focused on energy performance, white is the recommendation.
Actual coverage rates depend on product formulation, application method, and roof surface texture. High-solids formulations (90%+ solids) require less material per mil of dry film thickness than standard formulations.
This is where silicone coating systems fundamentally change the economics of roof ownership. At the end of the warranty period — when a traditional roof would need tear-off and replacement, a silicone-coated roof needs only a thin maintenance recoat applied directly over the existing silicone. No tear-off. No disposal. No structural work. Just a fresh layer of silicone that renews the warranty and the reflective surface.
This means a properly maintained silicone coating system can protect a structurally sound metal roof essentially indefinitely, through multiple recoat cycles spanning 40, 50, or 60+ years, at a fraction of the cost of repeated roof replacements.
A properly specified and applied silicone roof coating system lasts 15–20+ years. The high-solids formulations we use maintain their flexibility, UV resistance, and waterproofing performance across Nashville's full temperature range, from below freezing to 170°F+ surface temperatures in summer. At the end of the warranty period, the coating can be recoated with a thin maintenance layer to extend protection further.
Quality 100% silicone coatings bond to a wide range of substrates: metal (Galvalume, galvanized steel, aluminum, previously painted metal), sprayed polyurethane foam (SPF), concrete, PVC, EPDM, TPO, modified bitumen, built-up roofing, and previously applied elastomeric coatings. Some substrates require an adhesion primer, particularly TPO, smooth metals, and some previously coated surfaces. We always perform adhesion testing before full application to verify proper bonding.
Yes — this is one of silicone's key advantages. Silicone cures by reacting with atmospheric moisture, so Nashville's humidity actually helps the curing process rather than hindering it. The surface temperature should be between 35°F and 120°F, and the environmental temperature should be at least 5°F above the dew point. The coating develops rain resistance within about one hour of application under normal Nashville conditions. Acrylic coatings, by contrast, cure by water evaporation and can fail in high-humidity conditions.
Yes. Cured silicone is extremely slippery, especially when wet. This is why walk-pad coatings with non-skid granules are applied to every area that will see foot traffic — around HVAC equipment, access hatches, roof drains, and maintenance routes. Walk pads are not optional; they are a safety requirement for any silicone-coated roof that will be accessed.
Silicone coatings do tend to accumulate dirt and environmental debris over time more than acrylic coatings. This can cause the surface to discolor — a cosmetic issue that has minimal impact on waterproofing performance but can reduce reflectivity somewhat. Regular rain in Nashville helps, and periodic cleaning can restore reflectivity. The CRRC rates both initial and three-year aged (soiled) reflectance values; even after soiling, quality silicone coatings maintain strong reflectance — typically 0.70+ after aging, still well above the cool roof threshold.
In Nashville, silicone can be applied from early spring through late fall — roughly March through November. The ideal window is April through October when temperatures and humidity support fast curing. Surface temperatures must be between 35°F and 120°F. We avoid application during active precipitation, and the roof must be dry before coating. A high-solids silicone skins over in approximately 45 minutes and is walkable in 4–6 hours under standard Nashville conditions.
No. Paint is a thin cosmetic coating (1–3 mils). A silicone roof coating is a thick, engineered weatherproofing membrane (20–30+ dry mils) that creates a seamless, waterproof barrier. It is tested to ASTM D6694 standards, rated by the CRRC for solar reflectance and thermal emittance, FM Approved for commercial applications, and warranted for 10–20+ years of waterproofing performance. It is closer to installing a new roof membrane than it is to painting.
No. Silicone roof coatings are not for use on three-tab asphalt shingles or architectural shingles. They are designed for metal roofs, single-ply membranes, SPF, concrete, and other commercial and industrial substrates. If you have an asphalt shingle roof, the solution is replacement — not coating.
The CRRC reports average cool roof energy savings of 7–15% of total cooling costs. The high-solids silicone coatings we apply achieve an initial Solar Reflectance Index (SRI) above 100 — meaning they reflect more solar energy than a theoretical standard white surface. Even after three years of soiling, the SRI remains above 85. For Nashville commercial buildings with large roof footprints and high cooling loads, the savings can be significant — $3,000–$7,500+ per year on a 20,000 sq ft building.
The International Building Code requires that if two roofing layers already exist on a structure, the entire roof must be torn off before adding a third layer. A silicone coating is classified as a coating — not an additional roofing layer — so it does not trigger this requirement. Buildings can be continually recoated without adding significant weight, without tear-off, and without violating the two-roof rule. This is a significant advantage for older commercial buildings that have already been re-roofed.
Yes. Thermal imaging is included as part of our standard coating scope — not an optional add-on. We image before and after every coating project to document the baseline condition, identify hidden problems, and verify the temperature reduction achieved. We also offer standalone thermal imaging assessments for building owners who want a diagnostic evaluation of their existing roof without committing to a coating project.
When evaluating any silicone roof coating, ask for the following: volume solids percentage (90%+ for high-solids), CRRC-rated initial and aged solar reflectance and thermal emittance, FM Approval status, ASTM D6694 compliance, tensile strength and elongation at both 23°C and -18°C (verifies cold-weather performance), tear resistance (ASTM D624), permeance (ASTM E96), and cured film temperature stability range. The products we use are tested across all of these parameters and carry the documentation to prove it.
Start with a thermal scan. We will image your roof, show you exactly where the heat is going, and give you an honest assessment of whether a silicone coating system is the right solution, or whether your roof needs something else entirely. No obligation. No pressure. Just the truth, documented in infrared.
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