Heat is a factor that alters the comfort of a certain space. The use of roof coverings improves the conditions of the buildings and offers additional benefits.
by National Institute of Coating Technology, India.
Most of the world's ceilings are dark in color. Under a blazing sun the surface temperature of a colored roof can increase by up to 50 °C, reaching temperatures of 70 to 90 °C. This increased heat seeps into buildings and can cause negative effects on the energy used for cooling in buildings.
On the other hand, cool ceilings offer immediate and long-term benefits. The following are some highlights:
- Reduced heat retention, since a white or reflective ceiling usually increases only 5–14 °C above room temperature during the day.
- Savings of up to 15% on energy use from air conditioning in single-story buildings.
- Improves the energy efficiency of roofs, especially when there is no adequate insulation in the enclosures.
- Improves thermal comfort in buildings that do not have air conditioning.
- Reduction of emissions of air pollutants and greenhouse gases, as well as significant compensation for the warming effects of greenhouse gas emissions.
Cool ceilings allow energy savings in the cooling system during hot summers. White surfaces reflect more than half of the radiation that reaches them.
If all urban roofs and flat roofs located in hot weather locations were white, the consequent 10% increase in global reflectivity would offset the warming effect of 24 gigatons of greenhouse gas emissions, equivalent to removing 300 million cars from the roads over 20 years. This is based on the fact that a 1,000-square-foot (93 m2) white roof offsets 10 tons of carbon dioxide over its 20-year lifespan. This is based on a real large-scale case study work of cooling a higher reflectivity.
A 2012 study, conducted by researchers at Concordia University, looked at variables similar to those used in the previous study and estimated that the global installation of cool roofs and pavements in cities would generate a global cooling effect equivalent to offsetting up to 150 gigatons of carbon dioxide emissions. enough to have all the cars in the world off the road for 50 years.
Advantages
Fresh roofing coatings provide high-performance thermal insulation coating from SK formulations, a fast-growing company that for more than a decade has offered superior quality polymer coatings.
These kinds of applications for cool roofs promise to reduce heat transfer from the outside to the inside of buildings and make homes, workplaces, floors, etc. more comfortable by keeping these structures cool in summer.
Coatings for fresh roofs can prevent more than 85% of solar radiation from being absorbed into the structure, thus providing protection against thermal shock, thanks to which the useful life of buildings is prolonged.
Energy conservation that results in cost reduction: In the scorching sun, coatings for fresh ceilings provide the much-needed cooling effect.
Unlike other conventional systems, cool roof coverings not only slow down the caloric transfer rate, but serve to stop it altogether. Consequently, thanks to a cooler outdoor surface, the operating cost of air conditioning is significantly lower, so electricity bills go down.
Lower costs
A surface coated with coatings for fresh ceilings requires virtually no maintenance. Because there is no need to waterproof and/or do an anticorrosive treatment, recurring costs are significantly reduced.
On the other hand, the cost of labor for carrying out regular maintenance is completely eliminated. Since cool roof coverings also increase the life of coated ceilings, there is no need to remodel a coated surface several times. Therefore, fresh roof coverings offer an overall reduction in maintenance costs. They can be applied on earthenware/terraces for similar benefits.
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