White Metal Roof Energy Savings

Cool roofs can save money several ways including energy savings rebates and incentives hvac equipment downsizing and extended roof lifetime.

White metal roof energy savings.

Switching to a white roof can actually reduce energy use by about 20 percent in hot sunny weather according to the lawrence berkeley national laboratory heat island. No matter which direction you choose look for an energy star rated roof for maximum energy savings. Lighter color roofs reflect sun s heat much better than darker colors. The benefits of a white roof.

A white metal roof saves energy through high solar reflectance. In fact a high end kynar 500 white metal roof is energy star rated and classified as a cool roof by the cool roof rating council. Over the course of a typical hot august day in scottsdale arizona a white roof is 4 62 cooler more energy efficient than a non white roof. This highly reflective coating uses cool pigments in the paint to increase solar reflectance and lower the surface temperature of the roof.

Please remember the energy savings that can be achieved with reflective roofing is highly dependent on facility design insulation used climatic conditions building location and building envelope efficiency. Even at r50 cool roofs can produce a measurable cooling energy savings compared to a low albedo roof even if it comes without a noticeable difference in comfort for the occupants. Whatever roofing material you choose it s a good idea to add a reflective roof coating to the material to achieve higher reflectiveness. Additional coatings and pigments can also increase the thermal emissivity of a white roof further increasing the energy savings.

Such a roof can be reasonably expected to be some 50 to 60 degrees cooler than a dark color asphalt shingles roof. During the hottest point in the day inside the building 5 00pm a white roof is 8 49 cooler more energy efficient than a non white roof. These roofs can last for 40 to 70 years and are recyclable at the end of their useful life. The most effective energy saving finish for metal roofing is commonly referred to as cool metal roofing.

Additional cool roof costs include specialized materials and labor. White roofs increase energy efficiency. The popularity of metal roofs has soared in recent years because of their durability energy efficiency and environmental performance. Major roof costs include upfront installation materials and labor and ongoing maintenance repair recoating and cleaning.

Energy star certified roof products. Metal roofs are probably the most expensive first cost cool roof solution but they also have a favorable life cycle cost which shouldn t be ignored. Emissivity and how it relates to energy savings and cool roofs.