I don't have an explanation that is "scientific", but here in AZ many
people coat their roofs with white paint or white rubberized compounds
instead of shingles,etc. The common logic is that the white reflects
the heat away from the house. I don't know that this logic is true, but
I do know that when I recoated my house a year ago, my cooling bill
dropped about 35%, recovering the cost of the coating in one month. We
did the same in Kansas with flat roofs, only there we used aluminum
paint. I didn't pay those bills so I can't verify any savings.
HTH,
Dave Miles
Tucson, AZ
Tony Clark wrote:
>
> Phil Ethier comments:
>
> > Oddly enough, shiny metal seems to heat in the sun more than white-painted
> > metal. I walked up to a white van parked in the sun. The chrome bumper
> was
> > hot and the white body was cool. Hmmm.
>
> Hmmm indeed!. . . I clad an outbuilding on my shop lot with shiny
> galvanized material and noted that in direct summer sun, the shiny metal
> was so hot I could not bear to hold my hand on it while the white painted
> metal next to it was very comfortable to touch . . . I expected the opposite
> . . .
>
> Any physics major want to "splain" this to we with inquiring minds?
>
> Tony_Clark______________________lotus.tony@airmail.net
>
> >
> > Phil Ethier Saint Paul Minnesota USA
> > 1970 Lotus Europa, 1992 Saturn SL2, 1986 Chev Suburban
> > LOON, MAC
> > pethier@isd.net http://www.visi.com/mac/
> >
> >
> >
> >
> >
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