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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: Mounting PV panels

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    • CommentAuthorGavin_A
    • CommentTimeApr 24th 2012
     
    we had one reported leak on a 10kWp install we'd done on a fake slate roof using the drill and bolt method.

    after spending half a day removing panels and trying to replicate the leak with a hose, we eventually found out that it had actually been leaking on both sides of the roof, not just where we'd installed, and it turned out that we'd possibly loosened the ridge vents while working on the roof, and it was the ridge vent that was leaking.

    Other than that, not a sausage, and we've done several in the wilds of scotland, 2 of which have just come through their 2nd winter with no issues.
  2.  
    do you usually go for the drill and bolt method Gavin (no crude pun intended :bigsmile:)
    I've done similar on a fake slate job also , no problems reported to date

    stripping out, to flash in and you can end up taking half the roof off , had a look a jimmy's flash kit, still need
    7 slates out per bracket , say 32+ ish brackets on a 16 panel job , 224 slate to pull , that's a lot of labour.
    looks like a pucker job though
  3.  
    I just didn't fancy the idea of drilling our interlocking Cambrian tiles, just seems wrong when you consider they will be there for excess of 20 years. I also found you end up stripping off loads of surrounding tiles, came up with my own solution cutting slot out of tile and use of non-lead flashing, I hope the solution will stand the test of time.
    • CommentAuthorsnyggapa
    • CommentTimeApr 26th 2012
     
    Phil's picture looks remarkably similar to what we ended up with - the brackets bolted to the rafters which run down a bit where they are bolted then lip up about 1cm run down maybe 6 inches over the slate below, poking through a channel cut in the slate above, then flashed with lead. In fact, if I didn't know otherwise I'd think that was a picture of my roof.

    How good a construction method this is , I don't know, I got the impression that teh PV installer was making it up as he went along and had never fitted a slate roof before - my builder gave him a hand doing it.

    -Steve
  5.  
    That's got to be good news Steve, two of us can't be wrong :-)

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