White Roof Coatings
To reduce solar heat in countries experiencing very hot summers, white roof coatings can be an incredibly helpful investment. By reducing the surface temperatures by a huge amount, they keep interiors cool and thus save expenses on air conditioning expenses.
These white reflective coats act as mirrors, reflecting the sun’s radiations back to the atmosphere, at least most of them. These coating contain UV blocking pigments, thus acting as a protective gear, and extending the life span of the roof. White paints are known to reflect up to 85% of sunlight falling on them.
Advantages of using white roofings:
They help shed water and hence keep interiors dry.
Ensures prolonged life of roofs.
Helps tolerate the expansion and contraction of the underlying substrate.
Applying on existing roof coatings will not harm them.
White coat roofing contains polymeric materials and white pigments. White pigments may be titanium oxide. This pigment helps the coating to remain opaque and reflective. These pigments also act as protective barriers against the harmful UV rays. Maintaining this high reflectivity of the paint is very important.
Issues that must be looked into before application of the coatings:
The substrate must be compatible with the coat.
Kind of roof applied should be noted. If yours is a flat roof, you may need to give more attention to soil logging, which might affect the performance of the coating.
Occasionally, aluminum coating may increase the solar reflectivity and thermal effects.
White roof coatings are especially suited for inclined roofs. Low inclination roofs with white coatings will conserve more power than a coating on a flat roof.
All that is required for this solar radiation control is a material with good solar reflectance and high infra red emittance. Summers turn out to be very hot because the gravels, sand and cement don’t have such high reflectivity.
By using this white roof coatings, one can ensure that energy consumption is less, thus conserving energy efficiently. These coatings can take some time to dry depending on the substrate material and kind of roof. They remain strong and protective for years together. In case they start degrading, recoating will restore the ambient cooling power of the roofs.
They guard the roofs from effects of climatic changes, moisture, contraction and expansion due to heat. Thus, by making a choice of selecting white roof coatings, you also choose to play your part in saving the world and letting it stay green.
