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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.

PLEASE NOTE: A download link for Volume 1 will be sent to you by email and Volume 2 will be sent to you by post as a book.

Buy individually or both books together. Delivery is free!


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  1.  
    Hi

    I was thinking of 18mm osb, covered in felt, then some newspaper, turf laid upside down and then sedum seeds on top.

    Not after anything fancy, just a small shed on the side return of my terraced house.

    Is that a resonably cheap and basic way to go about it?
    • CommentAuthortony
    • CommentTimeJun 19th 2018
     
    Joists at 200mm c/c and 30mm bigger than tables (or tony rules) fairly shallow pitch
  2.  
    It's only going to be 800mm front to back....

    Surely that is overkill? 3x2 and 18mm osb should be plenty?
    • CommentAuthortony
    • CommentTimeJun 19th 2018
     
    Osb will dip between the rafters under long term loads

    4x2 joists for me at 200 or 250 centres
  3.  
    What about floor and uprights? 4x2 too at 400 centres?

    Shed will only be 2.4m long, 800 wide and about 1800 high at the front and 2100 at the rear
    • CommentAuthorowlman
    • CommentTime6 days ago edited
     
    Isn't 20.6 degree pitch too steep?
  4.  
    mate just used some coraline with a bit of epmd over it half filled the lower sections with dirt and stuck some sedum in there , looks great after a year
  5.  
    What's coraline?
  6.  
    •  
      CommentAuthordjh
    • CommentTime6 days ago edited
     
    Posted By: jamesingrammate just used some coraline with a bit of epmd over it half filled the lower sections with dirt and stuck some sedum in there , looks great after a year

    Sounds like a good idea; I might put that on top of my shed.

    What's the EPDM for? Root barrier? Seems like it significantly increases the cost - is it worth it?
  7.  
    Water proofing but not necessary if your happy with the coroline or got something under it.
    his was pretty flat and only had the coroline on it.
    thin epmd is pretty cheap now,
  8.  
    sedum does seem to have much of a root , grows on pretty much nothing
  9.  
    I can't see how the coraline would work with a green roof. How would you build the upstands at the lowest edge?
  10.  
    you dont bother , if its not too steep the seedum will happily sit there in the troughs , with very little substraight.
    its the low tech solution
  11.  
    Shed floor and walls now made. Opted for 3 x 2 in the end. 4 x 2 would have been overkill.

    The floor is 2400 x 600mm with joists at 400 centres. I now need to get the floor level. What size posts do I need and how many will be enough?

    The front can actually be levelled off an existing brick pier wall, but I'll need supports at the rear. 3 be enough? And use 3 x 2 again on top of blocks?
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