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View Diary: Energizing Energize America for Change We Can Believe In (53 comments)

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  •  Okay ... (6+ / 0-)
    1.  If really interested, I'd suggest that you take a look at the item linked in the diary.
    1.  The analysis is that, writ large across the Continental United States, white reflective roofing will save energy directly on the buildings due to reduced energy use. In addition, the roofing will last longer and have fewer maintenance issues as the temperature extremes through the days/year will be lower.  In addition, the white reflective doesn't only reduce a building's energy demands, but also reduces the urban heat island effect.
    1.  While there are few homes in the north with flat roofs, commerial roofs (warehouse stores, malls, office buildings, schools, hospitals, factories) are typically flat.

    To give an idea as to benefit, according to Wal-Mart, the payback period for the extra cost of going to higher quality due to energy savings from traditional asphalt to white roofing is on the order of a few weeks.  At a public presentation, the Wal-Mart exec in charge of roofing jokingly said that the benefits were so clear that Wal-Mart had made it mandatory for 100% of its buildings globally and 'would put a white roof on a store at the North Pole'.  While Wal-Mart is not to be favored for lots of reasons, on energy efficiency within buildings (since it is real $s for them), they are to be listened to as they really are leading edge in many of these arenas.

    •  Even ashphalt roofs that are white (2+ / 0-)
      Recommended by:
      mataliandy, A Siegel

      are cooler in the summer than dark roofs.  I will read your link.  

      They're asking for another four years -- in a just world, they'd get 10 to 20 ~~ Dennis Kucinich

      by dkmich on Sat Dec 06, 2008 at 08:00:27 AM PST

      [ Parent ]

      •  Yes ... but ... (5+ / 0-)

        Actually, the specifics on various roofing goes beyond my 'tip of the toungue' knowledge base and sends me to reference material. The discussion that is linked has links into real experts / such reference material.  There are different qualities / values to the albedo factor and longevity of different roofing options.

        In many situations, 'green roofing' has more value -- but it is a much more significant upfront cost with a longer payback period. And, it is not as easy to 'retrofit' as simply 'white roofing'.

        •  Green roofs, (1+ / 0-)
          Recommended by:
          A Siegel

          They're asking for another four years -- in a just world, they'd get 10 to 20 ~~ Dennis Kucinich

          by dkmich on Sat Dec 06, 2008 at 08:21:29 AM PST

          [ Parent ]

          •  Well aware of River Rouge ... (4+ / 0-)
            Recommended by:
            dkmich, BTower, RonRaunikar, MPociask

            You're allowed to compliment Ford directly.  

            An issue is that the fiscal structure makes a green roof on an industrial factory somewhat 'good will gesture' rather than fully cost-effective as it is hard to value the 'external' benefits (reduced air pollution, etc ...).  Don't know specifics of the ROI of River Rouge, but generally such commercial green roofs often fall outside 'normal' internal investment guidelines and are done for 'goodwill' and similiar benefits (unless communities have significant valuing of storm water runoff/such reduction).

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