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
Look into insulated roof panels with an air gap and IR-reflective foil. I’ve install these on a number of buildings to reduce attic or cathedral ceiling heat gain. Continuous airflow from eave to ridge. Then you can install the new shingles directly on this. No issues with wind uplift or excessive structural load. An example is Hunter Cool-Vent panels:
https://hunterpanels.com/products/roof-products/cool-vent/
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