this post was submitted on 14 Nov 2023
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Covering our roofs with it would certainly make a difference. BUT, it works in the winter too, cooling the house when we want it warm. So, that might increase the need for heating in the winter.
Personally, I'm waiting for a commercial product, because my NM house has a large, south-facing stucco wall that is currently white, but not ultra cool white. Given my experience with the house, which is well insulated, I expect I could paint the house with such paint and not need any other cooling, even when it hits 100+F here. That wall is my bedroom wall, and I can feel the heat pushing through it in the late afternoon after a full day of exposure to the sun.
In winter my roof is covered with snow. White roofing would absorb less heat from the snow but that may be a good thing, reduce melting.
Could throw some tarps over it, but that'd be difficult and expensive