| Ron Purvis 2006-04-27, 6:21 pm |
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"daestrom" <daestrom@NO_SPAM_HEREtwcny.rr.com> wrote in message
news:oE94g.11519$ZQ3.9833@twister.nyroc.rr.com...
>
> "SJC" <sjc_paul_1@yahoo.com> wrote in message
> news:_pP2g.933$0z.159@trnddc01...
>
> "CM" <cm@cm.not.really> wrote in message
> news:cTB2g.701$Vn.558@newsread4.news.pas.earthlink.net...
> I could envision flying over the US from north to south and seeing black
> roofs in the north and white roofs in the south. That might save natural
> gas
> for heating in the north and electricity for cooling in the south. Perhaps
> one
> simple but effective solution.
>
> Couple ofl things wrong with this idea (at least for northern climates).
>
> 1) It assumes the roof temperature is a direct input to heating/cooling.
> In the great white north, people actually *want* a cold roof, not a hot
> roof. Cold roofs, well insulated from the living space do not promote as
> much icicle formation.
>
> 2) 'Black roofs' in the north don't stay black after the first snow fall.
Excellent points about those in the north. I think it is still valid that
the people in the south should have more reflective roofs than what they do.
In my neighborhood I see many roofs that are black. That is just asking for
problems.
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