To clarify the importance of the SRI index, let's look at some basic concepts. Solar reflectance describes a surface's ability to reflect solar radiation back to the atmosphere. This applies to both visible and invisible light (especially UV rays).

Reflectance is measured as a percentage: a commercially available white paint with high reflectance can reflect up to 75% of the sun's rays during its period of maximum effectiveness (wear and tear and deposits will rapidly blacken it). CovaTherm technology, on the other hand, will reflect 94% of solar radiation.

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Thermal emittance represents a material's capacity to emit heat previously absorbed in the form of thermal radiation. The higher the emittance percentage (index between 0 and 1), the more heat is released. CovaTherm reflective paint allows 88% of the heat received to be reflected back, keeping covered surfaces cool.

Covalba applies a protective layer to the reflective paint: CovaTherm Top Coat, whose self-cleaning properties reduce soiling from surrounding pollution. As a result, the roof remains bright white over the years, retaining its ability to reflect the sun's rays.

We do, however, recommend that you carry out an annual inspection of your roof to check that no external elements are interfering with the perfect whiteness of the applied reflective paint. At the same time, we recommend that you clean your roof with water, to remove any particles that may have accumulated on the coating and improve its solar reflection performance.

Installation of the CovaTherm roofing system by our certified applicators is covered by a two-year warranty. This takes into account the perfect adhesion of the system to its substrate.

The accelerated aging test of 4000 hours of exposure in a QUV enclosure (SRI in aged condition) proves that reflective performance is maintained at the same level as when new.

The CovaTherm Top Coat (UV and natural dirt protection) guarantees reflectivity for up to 20 years. We recommend rinsing the roof with water once a year.