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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
These two books are the perfect starting place to help you get to grips with one of the most vitally important aspects of our society - our homes and living environment.

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Renewable Energy: PV panels used as roofing?

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    • CommentAuthorXT600
    • CommentTimeMay 12th 2020
     
    Has anyone experimented with using PV panels as roofing? I'm wondering if they could be butted up together (with a bead of silicon between) and bolted straight down into timber to form a veranda roof. 100% water tightness isn't such an issue here, so I can't think of any reason why this may not be a good idea. Any thoughts anyone?
    • CommentAuthorJeff B
    • CommentTimeMay 12th 2020
     
  3.  
    Never mind verandas I have often wondered why PV panels are not made to be the primary roof cover to replace tiles.
    It seems to me that for new build it would make sense to do away with the tiles and use PV as the outboard protection rather than an optional retro-fit
    • CommentAuthorPeterStarck
    • CommentTimeMay 13th 2020 edited
     
    A simple solution like that would be okay for a verandah roof and there are several manufactured solutions for house roofing.

    https://www.spiritenergy.co.uk/kb-roof-integrated-solar-panels
    •  
      CommentAuthornigel
    • CommentTimeMay 13th 2020
     
    I have used these on mine.
    http://www.windandsun.co.uk/products/PV-Mounting-Structures/GSE-Integration-Roof-Integrated#.Xru5NhP0nRY

    You can use their flashing system to integrate with slate or tiles and I suspect you could modify it you wanted to just have panels on the roof.
    • CommentAuthorXT600
    • CommentTimeMay 13th 2020
     
    The in-roof systems are still very expensive when compared to traditional on-roof. I think that's enough to put people off using them. There is also the issue of efficiency, where the on-roof systems rely on the air circulation underneath to keep them cool and running at their best. As for the verandah idea, this is for a friend of mine who wants pv on a budget, so because the verandah already exists and is yet to be covered, it seems like a good idea. I just wanted to check because it's not something I've done before :-)
    •  
      CommentAuthornigel
    • CommentTimeMay 14th 2020
     
    In roof systems are slightly more expensive but if they are going on a new roof the difference is minimal as there is a saving in roof coverings.

    I agree that there is a loss of efficiency compared to on-roof but I personally find the on roof systems hideous if the roof is clearly visible.

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