My house is hot in the southern United States. Trying to add insulation in the attic space during the summer almost killed me last year. The attic was so unbelievably hot. I have developed a roof leak and was thinking about a metal roof on top of my current roof. I was wondering why a metal roof can’t be installed on braces a few inches above an existing roof to function as a roof and shade. The airflow between the two would have to cool the attic, much better than if the heat radiated through straight to the shingles and plywood. We bought a sunshade for our back patio, and I’ve thought about even something as simple as that over smaller homes could drastically help.
In: Engineering
You could but whatever you built would have to be sturdy. Roofs that don’t let wind under them easily blow away, imagine if you had an umbrella mounted over the house. It’s just asking to blow away. Other than that, it’s an extra cost up front and something that needs to look good while working well enough to justify the cost. It’s easier to just choose white roofing if that is important to you.
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