Contrary to what most people think about metal roofs, they are the most energy-efficient roofing material out there. The general assumption is that since metal conducts heat, it will absorb the sun’s warmness, making the inside of your home extremely hot. Similarly, it will absorb heat from the inside of the house in winter, leaving it cold and uncomfortable for residents. However, this assumption about metal roofs can not be more wrong.
The truth is, metal roofs help you save 40 percent on HVAC costs in all seasons, providing excellent reflectivity in summer and great insulation in the winter months. Here is how metal roofs are energy efficient in all seasons.
One of the main reasons people invest in metal roofs is their longevity and sturdiness that significantly decrease their overall cost. They are low maintenance and can withstand any kind of season. For example, in Edmonton, we experience all types of weather throughout the year, and our roofs have to go through things such as ice dams, mold, tree droppings, moss, and more. Even the highest quality of composite shingles are unable to bear the burden of such dramatic atmospheric changes.
However, metal roofs don’t struggle to maintain their appearance or function amid these events. Their sturdiness and longevity make them even more energy-efficient.
Metal has high reflectivity, reflecting the wavelengths that come from the sun back to the atmosphere and away from the building. This is another reason why they are so energy-efficient. So, in summer, your metal roof, although very hot to the touch, doesn’t allow the heat to transmit down into your home.
To better understand this concept, let’s look at the example of a car’s metal hood. In summer, the car’s hood becomes extremely hot, but as soon as we move the car into the shade, it dissipates heat so quickly that the hood and inside of the vehicle becomes cooler than the surrounding air in a matter of just a few minutes.
However, with asphalt shingles, summer can get pretty uncomfortable. They are heat-retainers and tend to absorb most of the sun’s heat and transmit it down into your home. Dark-colored asphalt shingles can reach up to 160 degrees in temperature during a hot day and continue to disseminate that heat down into the building even after sunset.
Since metal roofs reflect heat and make your house cooler in the summer, it doesn’t mean they are likely to freeze your home in winter. Metal roofs don’t act like ovens, and when installed correctly, they can prevent the temperature fluctuation between the outdoor air and your attic. This means that your indoor environment will stay the same, whether it is hot or cold outside.
By creating an effective barrier between the attic and the outdoor environment, the metal roof reduces heat loss and maximizes energy efficiency. It also reduces condensation build-up in your attic, which can negatively impact the attic’s insulation value by causing water damage. Metal roofs also keep a consistent temperature throughout its entire area and prevent ice dams.
Stahl Roof Systems specializes in commercial and residential metal roofing. If you require a new roof and think a metal roof might be the best option for you and your energy needs, then contact our experts at Stahl Roof Systems. Our expert roofers make sure you receive the best customer service giving you peace of mind and a stunning roof.