Energy Efficiency and Metal RoofingDecember 8, 2022
Metal Roofing is one of the most energy-efficient materials on the market.
There are 2 major factors that make metal roofs the most energy-efficient material: reflectivity and thermal emissivity.
Metal roofing can reduce energy costs by up to 40% due to the reflectivity of UV rays. Unlike a shingle roof, metal roofs reflect 50-60% of the UV rays that are cast down on the roof. Shingle roofs not only reflect fewer rays, but UV rays damage shingles and cause them to crack and warp.
Thermal emission is the ratio of energy radiated from a surface back into the sky and returning to its “normal temperature”. It is measured in decimal form and ranges from 0 to 1, with 1 being the most emissive and having more cooling abilities. Most metal roofing falls somewhere between .70 and .85.
Due to these factors, metal roofing keeps buildings or homes cooler in the warmer months and warmer in the cooler months.