Metal roofs reflect the sun's ultraviolet and infrared light rays that contribute to the radiant heat of the roof surface, which can result in a 10-25% reduction in cooling costs. Metal roofing does not heat a house any more than other types of roofing materials. Because metal roofs have a low thermal mass, they reflect light and heat rather than absorb it like asphalt shingles. This means that instead of heating your home during the summer months, metal roofs help keep you cool, increasing your home's energy efficiency.
First of all, both the color and finish of the metal affect its heat absorption. Metal exposed directly to the sun will certainly heat up, but if it heats up more or less than other roofing materials it has to do with color and finish. The Energy Star finishes used in most of our metal roof products are certified to reflect sunlight and are therefore cooler than previous finishes. And a pale color will absorb less heat than a dark color.
A metal roof acts as an insulator and naturally reflects UV radiation from the sun. This will keep your home cool in the summer and warmer in the winter. You can increase its reflective properties by painting a metal roof in a light color, such as white. On the other hand, asphalt shingles and many other roofing materials absorb energy from the sun, heating your home and increasing your energy bills.
The metal roof itself would not heat your home any more than your existing roof material. The outside of your metal roof will cool down much faster (once the sun goes down) than the existing roof. Metal roofs are one of the most energy efficient materials available to homeowners and can help reduce the energy used to cool their home. Instead of absorbing all the heat from the sun, metal works to keep warm air out, which in turn reduces the amount of air conditioning you need.
Regardless of the type of roofing material you decide to install over your home, attic ventilation and roof construction are important factors that can determine how well your home balances the temperature. A metal roofing system includes an insulating layer that also works to keep the house cool and helps prevent heat and cold air from escaping. Just as various finishes have an effect on the heat absorption of metal surfaces, so does the color of the metal. Metal roofs are a great option for homeowners looking to improve the energy efficiency of their home.
Whether you're building a new home or replacing your current roof, be sure to consider the metal roof as an option. A metal roof with high thermal conductivity will quickly release that heat at night, making your home cooler at night. To help keep your home cool during the summer, some metal roof installers will include Above Siding Ventilation (ASV). Apologies to metalheads: When it comes to roofing system components, there's more to it than just metal.
A metal roof is not only cost-effective, but it also has energy efficiency benefits that make it a comfortable and attractive option. One of the biggest advantages of metal roofs is that they can reflect heat better than other materials such as asphalt.
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