One application tackles the three problems that plague aging steel-deck roofs at once: corrosion, leaks at sheet overlaps, and summer heat.
Reflective metal roof coating, reflective anti-corrosion coating, corroded metal roof renovation: several names describe a family of products formulated to fix the common defects of aging metal roofs. Used to renovate industrial steel-deck buildings without replacing the sheets, this solution is the most cost-effective option when the roof shows surface corrosion and localized leaks but is still structurally sound.
", "sections": [ { "titre": "How a reflective steel-deck coating works", "contenu": "A reflective coating for a metal roof combines three technical mechanisms on the same substrate:
The anti-UV Top Coat completes the system. It protects the resin from ultraviolet rays, stabilizes the whiteness, and prevents chalking over twenty years.
" }, { "titre": "The roofs CovaMetal 20 was designed for", "contenu": "CovaMetal 20 is the reflective steel-deck coating suited to the following situations:
For a structurally sound metal roof that needs only the reflective effect, the pure reflective coating CovaTherm may be enough. For a perforated steel deck or a degraded load-bearing structure, though, you still need a partial or full replacement before application.
" }, { "titre": "The budget for a reflective steel-deck coating per square meter", "contenu": "A professionally applied reflective steel-deck coating typically runs between €20 and €25/m², all-inclusive: assessment, mechanical stripping of corroded areas, plus supply and application of the complete system. Three factors cause the final figure to vary:
Against the traditional alternative, the case is clear-cut:
CovaMetal 20 cuts the renovation budget by a factor of 4 to 5, with the reflective effect and a twenty-year warranty thrown in. You can estimate the savings of a reflective steel-deck coating on your building.
" }, { "titre": "How a Covalba project unfolds", "contenu": "A steel deck renovation unfolds in five controlled steps, carried out by a professional applicator you commission.
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 downtime for the building's operations. Leave the application to a professional applicator trained to work safely on metal roofs.
" }, { "titre": "The protective effect of a reflective coating on a metal roof", "contenu": "On a dark steel-deck roof, the surface can hit 70 to 80°C in midsummer. That heat speeds up the breakdown of the sheets in three ways: faster oxidation when moisture hits hot metal (nighttime dew), thermal expansion that unseals the sheet overlaps, and repeated expansion-contraction cycles that fatigue the fastening points. Research on the aging of roof coatings is clear that ultraviolet light and thermal cycles are the two main degradation factors, and the process is highly temperature-dependent (Miller, Kriner & Desjarlais, 2002).
By taking the heat out of the roof surface, the reflective steel-deck coating sharply limits all three factors. Field tests run by the Lawrence Berkeley National Laboratory measured a surface temperature drop from 79°C to 49°C after a reflective coating was applied (Akbari, Berdahl, Levinson et al., 2005). Less heat absorbed means less differential expansion, fewer nighttime oxidation cycles, and a steel-deck service life extended by 8 to 10 years.
" }, { "titre": "A concrete lever against urban heat islands", "contenu": "Beyond the direct benefits for the building, a reflective steel-deck coating helps cut the urban heat island effect, where city centers and industrial zones run on average 2 to 10°C hotter than the countryside around them. The dark metal roofs of warehouses and industrial buildings are a big part of the problem, soaking up solar radiation and releasing it as heat.
Research on urban cooling strategies shows that widespread use of reflective roofs across a city could help lower ambient temperature and, in turn, the energy demand for air conditioning (Santamouris, 2014). Studies at the urban scale have even estimated that rolling out reflective roofs could cut heatwave-related mortality by 18%. Coating an industrial or logistics steel-deck building with CovaMetal 20 means pitching in on that collective effort, on top of gaining indoor comfort.
" } ], "sources": [ { "label": "Akbari, H., Berdahl, P., Levinson, R., Wiel, S., Miller, W., & Desjarlais, A. (2005). Aging and Weathering of Reflective Roofing Membranes. Lawrence Berkeley National Laboratory / U.S. Department of Energy.", "url": "https://www.osti.gov/servlets/purl/860745" }, { "label": "Santamouris, M. (2014). Cooling the cities — a review of reflective and green roof mitigation technologies to fight heat island and improve comfort in urban environments. Solar Energy, 103, 682-703.", "url": "https://doi.org/10.1016/j.solener.2012.07.003" }, { "label": "Synnefa, A., Santamouris, M., & Akbari, H. (2007). Estimating the effect of using cool coatings on energy loads and thermal comfort in residential buildings in various climatic conditions. Energy and Buildings, 39(11), 1167-1174.", "url": "https://doi.org/10.1016/j.enbuild.2007.01.004" }, { "label": "U.S. Environmental Protection Agency (2024). Using Reflective Roofs to Reduce Heat Islands.", "url": "https://www.epa.gov/heatislands/using-cool-roofs-reduce-heat-islands" } ], "replie": false }, { "layout": "cta", "origine": "CTASection", "variante": "final", "titre": "What will it cost to coat your roof?", "texte": "Get a tailored estimate for your project in under 48h. We reply within 24h, no commitment.", "cta_primaire": { "label": "Request a quote", "lien": "/en/diagnostic", "style": "primary" }, "cta_secondaire": { "label": "Estimate my budget", "lien": "/en/estimation", "style": "secondary" } }, { "layout": "grille_solutions", "origine": "RelatedProductsCovaMetal", "entete": { "badge": "Other solutions", "titre": "Also discover" }, "produits": [ "covatherm", "covaseal-20", "covatherm-light" ], "affichage": "cards" }, { "layout": "texte_image", "origine": "ApplicatorsSection", "entete": { "badge": "Distributors & partners", "titre": "Distribute Covalba reflective roof coatings" }, "contenu": "Are you a materials distributor, a waterproofing merchant or a roofing company? Stock our reflective roof coatings and give your customers a high-performance solution.
", "liste": [ { "texte": "Direct manufacturer supply at the best terms" }, { "texte": "Dedicated technical support and product training" }, { "texte": "Documentation, technical data sheets and sales support" } ], "image": { "path": "remote/9a4cb6d18cee.jpg", "alt": "Covalba reflective roof coatings for distributors and partners" }, "position_image": "droite", "cta": { "label": "Become a partner", "lien": "/en/devenir-applicateur", "style": "secondary" } } ] }