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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.

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    • CommentAuthorgeuben
    • CommentTimeJan 17th 2022
     
    I'm having a hard time finding any details on how the junction of IWI should look with a solid floor (tiled over stone). I've found diagrams for windows and suspended floors but nothing on solid floors.

    Any help would be much appreciated.
    •  
      CommentAuthordjh
    • CommentTimeJan 17th 2022
     
    Posted By: geubenI'm having a hard time finding any details on how the junction of IWI should look with a solid floor (tiled over stone). I've found diagrams for windows and suspended floors but nothing on solid floors.
    Lift the floor and dig out, put insulation in, refit the floor's surface treatment? Join the floor insulation to the wall insulation; details will depend on precise situation.
  1.  
    I read it as if the floor is uninsulated. Is that correct? If, as djh surmises, there is floor insulation then yeas, as he says, dig out the floor till you get the insulation and join the 2 together. That is far easier written than done(!) and don't forget continuity of membranes.
    • CommentAuthorgeuben
    • CommentTimeJan 17th 2022
     
    Sorry yes the floor is uninsulated.
    •  
      CommentAuthordjh
    • CommentTimeJan 18th 2022
     
    Sorry, I did understand that the floor is uninsulated. I just stated the approved technique for dealing with an uninsulated solid floor - namely dig it up and insulate it!
  2.  
    I have a similar question actually. If the insulation is lightweight insulating plaster should you apply all the way down the floor or leave a gap? The floor is insulated with screed over the top and PIR upstands around the edges.
  3.  
    Make the insulation continuous from the wall to the floor, no gap between wall insulation and PIR upstands, otherwise there's a cold bridge which attracts condensation.

    If the floor were not yet insulated (in geuben's case) then just carry the insulation right down to the existing floor, and address the junction as/when the floor gets insulated. EG you might subsequently decide to dig out the floor and re-lay it, or to board over it, you can't fix the detail until you know which.

    Some of the insulation mfrs have details on their websites, think I saw some on Kingspan's.
  4.  
    Thank you. So I don't have to worry about leaving a gap for plaster movement?

    Apologies for hi-jacking the thread!
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