Homeowners who have re-roofed with a Green Knight Metal Roof have found their air conditioning costs to decrease by 20-30% after the roof was installed with proper ventilation. This is due to the roof’s low emissivity value. Rather than pass the heat of the sun into your attic, the metal panels reflect a substantial portion of the sun’s rays. This reflectivity is an inherent property of the composition of the metal roof, regardless of the color you choose. According to testing conducted by the Florida Solar Energy Center, Aluminum allows up to 34 % less attic heat gain than traditional roofing materials and Steel can have a dramatic impact as well! This means a lighter load for your air conditioner and reduced energy bills for you.