\n {/* ─── How it works ─── */}\n
\n How does a cool roof coating work?
\n \n A dark roof absorbs up to 90% of solar radiation, then releases that heat into the building. A cool roof coating reverses the mechanism through two combined properties.\n
\n \n \n Solar reflectance: the coating's ability to reflect radiation rather than absorb it. A good cool roof coating exceeds 0.85.\n \n \n Thermal emissivity: the ability to release accumulated heat in the infrared range. The best formulations reach 0.90.\n \n
\n \n Combining the two gives the SRI (Solar Reflectance Index), the ASTM 1980 standard indicator used as the industry reference. The higher it is, the better the coating performs. CovaTherm 20 reaches an SRI of 119 when new and 118 after accelerated aging, among the best-performing on the market.\n
\n \n\n {/* ─── Acrylic vs Polyurethane ─── */}\n
\n Which technology to choose: acrylic or polyurethane?
\n \n Not all cool roof coatings are equal. The resin technology makes all the difference to the coating's real service life.\n
\n \n \n Acrylic resin: 90% of the market. Around €10 to 12/m². Degrades quickly under UV and chalking, with a useful life of 2 to 5 years.\n \n \n Polyurethane resin (CovaTherm): €20 to 25/m² installed, lasts 8 to 10 years with a simple maintenance coat. With anti-UV Top Coat (CovaTherm 20): 20 years with no intermediate touch-up.\n \n
\n \n Over a building's operating life, the cheapest cool roof coating to buy is always the one that costs the most.\n
\n \n\n {/* ─── Price ─── */}\n
\n Cool roof coating price per m²
\n \n The price of a professional cool roof coating, installed, averages between €10 and €25 per square meter, all-inclusive: assessment, surface preparation, material, and application. The price gap comes mainly from the technology used.\n
\n \n €10 to 12/m²: acrylic resin cool roof coating, service life 2 to 5 years.\n €20 to 25/m²: high-performance polyurethane resin cool roof coating like CovaTherm, service life 8 to 20 years depending on the finish.\n
\n \n Three additional factors move the final figure: the area to be treated (price tapers off above 2,000 m²), the condition of the substrate, and the geographic location of the project.\n
\n \n For comparison, a new waterproofing membrane costs between €80 and €100/m², and a full insulation + waterproofing replacement runs around €150/m². A cool roof coating therefore divides the budget by 3 to 7, with an average ROI of 14 months.{' '}\n \n Estimate the savings of a cool roof coating\n \n .\n
\n \n\n {/* ─── Project ─── */}\n
\n How does a cool roof coating project unfold?
\n \n The performance of a cool roof coating depends directly on the quality of the application. A Covalba project unfolds in five controlled steps, carried out by certified applicators.\n
\n \n {[\n { t: 'Technical assessment', d: \"A technician evaluates the condition of the substrate, measures moisture, identifies areas to repair, and checks material compatibility. A poorly assessed substrate means a coating that blisters.\" },\n { t: 'High-pressure cleaning', d: \"Removal of moss, dust, and residue with a pressure washer, without stripping. This step determines long-term adhesion.\" },\n { t: 'Primer application', d: \"A bonding undercoat prepares the substrate to receive the cool roof coating.\" },\n { t: 'Base coat application', d: 'The reflective coat is applied in two crossed passes, sprayed from the ground. Zero load on the roof, zero vibration, zero risk to the existing waterproofing.' },\n { t: 'Top coat application', d: 'On the long-life version only, this anti-UV and anti-soiling finish protects reflectivity for 20 years.' },\n ].map((s, i) => (\n - \n \n {i + 1}\n \n \n
\n ))}\n
\n \n Application is done in dry weather, between 10 and 35 °C. A typical 1,000 m² project is completed in 3 to 5 days, with no interruption to building operations. All applicators are PPE-certified and trained in safe roof work.\n
\n \n\n {/* ─── Durability ─── */}\n
\n Durability of a cool roof coating
\n \n The durability of a cool roof coating is measured against three criteria:\n
\n \n Its resistance to UV\n Its resistance to soiling\n Its ability not to chalk\n
\n \n A standard coating can lose up to 40% of its reflectivity in 5 years, which cancels out much of the initial thermal benefit.\n
\n \n CovaTherm 20, thanks to its exclusive anti-UV Top Coat, maintains an SRI of 118 after 4,000 hours of accelerated aging in a QUV chamber, equivalent to 20 years of solar exposure. The coating soils three times slower than standard solutions and does not chalk. It is among the best-performing for durability on this type of product.\n
\n \n\n {/* ─── Comparison ─── */}\n
\n Cool roof coating or other thermal solutions?
\n \n The choice between a cool roof coating, a new membrane, and a full renovation depends on the building, the budget, and the current condition of the roof. Here are the criteria that matter, and why a cool roof coating stands out as an{' '}\n \n alternative to waterproofing replacement\n \n .\n
\n\n {/* Desktop table */}\n \n
\n \n \n | Criterion | \n CovaTherm cool roof coating | \n New white membrane | \n Insulation + waterproofing replacement | \n
\n \n \n {comparisonRows.map((r, i) => (\n \n | {r.label} | \n \n {r.covatherm}\n | \n {r.membrane} | \n {r.refonte} | \n
\n ))}\n \n
\n
\n {[\n { name: 'CovaTherm cool roof coating', key: 'covatherm' as const, highlight: true },\n { name: 'New white membrane', key: 'membrane' as const, highlight: false },\n { name: 'Insulation + waterproofing replacement', key: 'refonte' as const, highlight: false },\n ].map((col, ci) => (\n
\n \n {col.name}\n
\n \n {comparisonRows.map((r, i) => (\n \n
- {r.label}
\n - {r[col.key]}
\n \n ))}\n
\n \n A cool roof coating is the solution that pays back the fastest, with no dismantling and no interruption to operations. It stands out as the reference for industrial, pharmaceutical, food-processing, aeronautical, and commercial buildings more than 10 years old, where keeping cool is critical and a heavy renovation is hard to organize.\n