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Politics : View from the Center and Left -- Ignore unavailable to you. Want to Upgrade?

To: TigerPaw who wrote (495003)	7/20/2022 3:41:27 PM
From: cosmicforce	Respond to of 541498

You probably have an air gap between the panels and the roof, right? That is definitely a plus. I suspect white is better than shiny tin - surprisingly. When we see specular reflection our brain sees them as more reflective. The test is to look at it with a thermal camera or even my "El Cheapo" meter - a meter says nothing is as cooler than engineered white coatings (even engineered films and mirrors) because they selectively re-radiate through a "window" of transmissibility in the atmosphere into the coldness of space. Snow is surprisingly good - it is a dielectric with tiny air bubbles which increase the probability that any random photon is sent back to somewhere on the hemisphere facing away from Earth.