The Science Behind Metal Roofing: How it Keeps Your Home Cool in Summer

Home Services Investment

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November 23, 2023

It looks like rising summer temperatures are here to stay, which means that homeowners are seeking out ways to keep their homes cool and comfortable without relying too heavily on expensive air conditioning.


One innovative solution that’s currently gaining popularity: metal roofs!


Beyond its durability and aesthetic appeal, metal roofing has the remarkable ability to help maintain a cooler indoor environment. It reflects heat and reduces energy consumption, making it an ideal choice for those looking to beat the summer heat while remaining eco-conscious.

Heat reflection


One of the key scientific principles behind metal roofing’s cooling effect: heat reflection. Metal roofs are designed with reflective surfaces that bounce a significant portion of the sun’s radiant heat away from the structure.


Instead of absorbing and transferring heat into the home like traditional roofing materials (for example, asphalt shingle roofs), the reflective qualities of a metal roof allow the material to stay cooler.


This reduces the heat load on the building, and keeps interior temperatures more comfortable– even on the hottest summer days.

Low solar absorption


Unlike some traditional roofing materials, metal roofs have low solar absorption properties.


Solar absorption refers to how much of the sun’s energy is absorbed by a material. Because metal is reflective, it absorbs minimal solar energy, preventing the roof from becoming excessively hot.


As a result, less heat is absorbed into the home, which creates cooler indoor environment and reduces the need for air conditioning.

Thermal emissivity


Thermal emissivity, in simple terms, is a roof’s ability to get rid of heat. Imagine a roof as a sponge. When the sun shines on it, the roof soaks up heat like a sponge soaks up water.


However, some roofs are able to get rid of the heat just as quickly as they take it in. A roof with a high thermal emissivity– like a metal roof– can soak up the sun’s heat and release it quickly.


This rapid heat dissipation makes sure that the roof remains cool.

Energy efficiency


The science behind metal roofing’s cooling effect translates into enhanced energy efficiency. Homes with metal roofs experience reduced energy consumption during the summer months. With less heat being transferred into the interior, the need for air conditioning is minimized, leading to lower energy bills and a decreased environmental footprint.

Environmental benefits


Metal roofing’s cooling properties have a positive impact on the environment. By reducing energy consumption and lowering greenhouse gas emissions from air conditioning, metal roofs contribute to a more sustainable and eco-friendly construction choice.


These roofs align with green building practices, and support energy-efficient homes.

Extended lifespan


The science of metal roofing not only keeps homes cooler, but also enhances the roof’s lifespan. Metal roofs are known for their durability and resistance to weather-related wear and tear. This long lifespan means fewer roofing replacements over time, reducing the overall environmental impact associated with the production and disposal of roofing materials.

A comfortable, energy-efficient living environment


Metal roofing’s cooling capabilities make it incredibly effective in creating a comfortable, energy-efficient living environment. By reflecting heat, having low solar absorption and high thermal emissivity, metal roofs can contribute to reduced energy consumption and a cooler home during the summer months.

These benefits make metal roofing a practical and eco-friendly choice for homeowners seeking additional relief from the summer heat. If that sounds good to you, give the experts here at PermaSteel a call today!

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