The greenhouse effect caused by the emission of gases, is a factor that significantly influences the climate change of the planet and thus the formation of “black holes” in the ozone layer that allow the passage of greater amount of ultraviolet rays (UV), causing problems in the body such as skin cancer and the damage of many materials that degrade by the effects of solar radiation and even more so, if we add chemical agents that cause corrosion in the materials.
The need to protect roofs and walls in industrial buildings, houses, garages, service yards, etc., has made it necessary to develop products of PVC and polycarbonates (PC) of second generation to withstand even the onslaughts of the nature like Hurricanes, hails and fire claims.
The products of “second generation” are called thus because their composition has been improved so that they are not affected by the ultraviolet rays (UV) providing an economic benefit thanks to their physical, mechanical and thermal properties.
They are designed to have a better thermal comfort and with this achieve electric energy savings by air conditioning, since these films do not absorb the solar rays, but what is done is that they reflect that heat in addition to assuring their resistance to the winds , Hurricanes and hails.
The advantage over traditional metal sheets is that, by very good coating or paint, ends rotting away, besides being very hot.
Compared to the fiberglass sheets, these are degraded by the action of UV rays, in less than a year they begin to yellow and surface the fiberglass as a sign that they already lost their properties, besides being highly flammable.
It prevents thermal inversion, which means that in greenhouses there is always an internal temperature higher than that given outside.