1/17/2024 0 Comments Reflective roof![]() ![]() The solar spectrum is adjusted from 0 to 1 or in percent. Light colors, especially white colors, have a high reflectance to the sun. Solar reflectance is the property of a material or surface to reflect solar radiation.Ī surface with high solar reflectance reflects most of the sun’s rays and is therefore cooler. This is where a Cool Roof comes into play, allowing the temperature increase to be reduced, reaching temperatures of around 40☌ compared to 80☌ with conventional roofs. That is why in summer, when temperatures are high, the phenomenon of the “urban heat island” (a thermal phenomenon caused by the temperature difference in the center of cities) causes an increase in electricity consumption, air conditioning costs and, consequently, pollution. In cities, building roofs account for 22% of the total surface area, and almost 30% of a building’s energy is lost if they are not properly designed and installed, as pointed out by the Association of Waterproofing Manufacturers of the Iberian Peninsula (AIFIm). ![]() Let’s now look at some interesting terms that will allow us to better understand cool roofing such as “heat island effect” and “SRI”. This is because white cool roofs have high heat reflectance and emissivity and reduce the dreaded “heat island effect” bringing tangible benefits. In countries with a lot of sun, such as Portugal, Spain or the Mediterranean countries, cool roof solutions are suitable for virtually all buildings. they have the ability to reflect the visible, infrared and ultraviolet wavelengths of the sun, reducing heat transfer to the surface, and have a high thermal emittance. Reflective roofs called ‘Cool Roof’ are surfaces that strongly reflect solar radiation, i.e. We will delve in detail into different aspects and see the advantages that this type of roofing brings to buildings. Today we talk about Cool Roof or Cool Roofing and reflective roofs, which allow us to reduce the interior temperature of buildings by reflecting the sun’s heat.
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