Want to read Slashdot from your mobile device? Point it at m.slashdot.org and keep reading!


Forgot your password?
Power Earth Technology

Dow Chemical Rolling Out Solar Shingles Next Year 168

Several users wrote to tell us that Dow Chemical plans on selling solar shingles as early as next year. The solar version can be integrated with normal asphalt shingling and will be introduced in 2010, with a wider roll-out scheduled for 2011. "The shingle will use thin-film cells of copper indium gallium diselenide (CIGS), a photovoltaic material that typically is more efficient at turning sunlight into electricity than traditional polysilicon cells. Dow is using CIGS cells that operate at higher than 10 percent efficiency, below the efficiencies for the top polysilicon cells -- but would cost 10 to 15 percent less on a per-watt basis."
This discussion has been archived. No new comments can be posted.

Dow Chemical Rolling Out Solar Shingles Next Year

Comments Filter:
  • Direct Link to DOW (Score:4, Informative)

    by swanzilla ( 1458281 ) on Monday October 05, 2009 @07:05PM (#29651417) Homepage

    Dow Solar [dowsolar.com]


    "This is just one example of how Dow's $1.5 billion annual R&D investment is allowing us to deliver practical solutions for some of the world's most critical challenges," said Dow Chairman and CEO Andrew N. Liveris.

    They might have hit this one out of the park if the projected $20 billion by 2020 is remotely close.

  • Re:Recycle? (Score:3, Informative)

    by syphax ( 189065 ) on Monday October 05, 2009 @07:23PM (#29651577) Journal
  • Re:Saving energy? (Score:2, Informative)

    by NoYob ( 1630681 ) on Monday October 05, 2009 @07:38PM (#29651709)

    Wouldn't it be easier to just paint the roof white so that the building reflects more heat and needs less cooling in the summer? (In the winter, insulation will keep the heat inside.)

    No. First of all, no house is energy efficient enough to do that. Much of the heat comes in and out through the windows. The materials used in construction are not good insulators and there are many ways the heat comes in and escapes out through the house: cracks and gaps, vent pipes, chimneys, air leaks around receptacles , opening and closing of doors, kitchen vents, etc....

    The best you can hope for in a home is to make it as energy efficient as you can.

  • My brother (Score:5, Informative)

    by poptones ( 653660 ) on Monday October 05, 2009 @08:12PM (#29652015) Journal

    Yeah, he puts on "rooves."

    Now, let me ask YOU this: can YOUR whiny ass carry a pack of shingles up a ladder in 100 degree sun? Have you ever even been ON a roof?

    Contractors are responsible for the contracts, not the roofers. It's not the greasy, sunburnt guys working their asses off who steal your money - it's the well dressed fellow sitting in the truck watching them work who takes your money.

    That said, I don't think any of you have read TFA. These are thin film shingles. There are demo videos on youtube - you can see them press holes in the shingles, even drive nails through them and they still work just fine. These are not silicon and glass, they are thin film on some sort of flexible substrate. And it's about time.

  • by Anonymous Coward on Monday October 05, 2009 @08:55PM (#29652327)

    You can't walk on slate shingles either yet people still find ways to work on slate roofs. I doubt that they don't have a solution.

  • by Brigadier ( 12956 ) on Monday October 05, 2009 @09:25PM (#29652505)

    Not sure why this is being posted as if it's a new product. Eagle Roofing based in California has been carrying a fairly successful product for some time now. Not only do they have a warrantied usable product but it also supports LEED cool roof requirements. see link below to check it out for yourself.

    http://www.eagleroofing.com/greenBld_eagleSolarRoof.htm [eagleroofing.com]

  • Re:Installation? (Score:3, Informative)

    by Hijacked Public ( 999535 ) on Monday October 05, 2009 @11:03PM (#29653053)

    English is not my native language but I've been speaking it quite a long time. But I did fuck up that post.

    Shingles are typically made by passing a thin fiberglass reinforcement under what is essentially a pipe out of which asphalt is pouring. The asphalt is about 200 celsius. The fiberglass reinforcement is moving at a speed of about 1200 feet per minute.

    The possibility exists that the solar panels are added to the shingle in a separate process, glued on or the like, after they've been produced on a traditional shingle manufacturing line.

  • Re:My brother (Score:3, Informative)

    by afidel ( 530433 ) on Tuesday October 06, 2009 @01:40AM (#29653827)
    Yes, I've stripped a double layer roof, replaced half the under-sheeting and put on a new roof including rubber matting to combat ice-dams in a long weekend. It's not really that hard. I did have my father as foreman who ran a midsized roofing company 25 years ago but most of the labor was just me and my brother. It's really quite simple if you have airguns =)

    Oh, and a funny story about corrupt roofers, my coworkers wife caught the crew doing the neighbors roof putting shingles on bare wood. Turns out the foreman was off drinking at the local strip joint instead of supervising the crew so they decided to slack off. The crew denied it up and down until my coworker provided video. The company ended up having to pay to strip and redo the whole thing even though it was only suspected that the back half was done wrong because who would trust them to have do anything right?
  • by swillden ( 191260 ) <shawn-ds@willden.org> on Tuesday October 06, 2009 @10:40AM (#29656953) Homepage Journal

    Tar shingles are cheap, easy to install (anyone can learn how in a few minutes), self-seal given just a couple of warm days and even self-heal to some degree.

    Where I live winter heating costs significantly exceed summer cooling costs, so I'd think the best choice is a slippery black roof so snow would slide off and the sun could heat the attic. Even better, of course, would be a power-generating roof which could be used to heat during the winter and cool during the summer.

  • by Bob-taro ( 996889 ) on Tuesday October 06, 2009 @10:42AM (#29656979)

    You can't walk on slate shingles either yet people still find ways to work on slate roofs.

    I worked in roofing for a while. You can easily walk on a surprisingly steep pitch once you're used to it (I doubt I could anymore). Usually, though, we would walk on boards that were set on metal brackets that hung from nails under the shingles. Even on a low pitch, we would usually put at least one row of boards near the bottom, in case someone slipped. When the roof was done, we'd slide the brackets off the nails, then slide the bracket over the nail head and under the shingle and hammer the nail flush through the shingle. I actually never worked with slate, but I imagine you could use the same method. Maybe you'd have to use a rubber mallet for the last step because the slate is brittle, or maybe you could skip the last step because the nail wouldn't ever work up through the slate anyway.

Loose bits sink chips.