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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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    • CommentAuthorMike1
    • CommentTimeSep 13th 2018
     
    Does anyone have any experience in stabilising cracks in rubble-filled stone walls?

    I'm contemplating converting an old barn that's not in great shape and in a lightly seismic zone (which probably contributed to the cracks). The walls are between 450 and 600mm thick, random stone faces, but apparently silled with stone rubble. Pointing, some stone replacement and maybe some helical bar stitching will probably fix the outside, but structurally I suspect it will either require building in some reinforced concrete columns and beams, or possibly a gunite internal surface. I'd need a structural engineer to proceed further, but I'd be interested in any lessons learned / costs involved if anyone has been involved in anything similar?
    • CommentAuthorCerisy
    • CommentTimeSep 14th 2018
     
    All the old buildings here in Normandy are rubble filled stone faced walled. They tend to be thicker so we don't have so many issues with needing to stitch, but we do obviously have cracks, etc, to deal with - some left over from the war!!

    We have simply filled and repointed the stone faces. Where we have created new openings - tricky as the rubble wants to tumble out - we have inserted timber lintels as we have worked our way through the thickness, reducing the movement above.

    We did find some walls have larger stones spanning the front and back walls, helping to keep the two faces working toegther!
  1.  
    What we do over here is (when the roof is off) to put a cast in situ concrete ring beam across the whole width of the wall and all around the building and then build the new roof on to that.
    • CommentAuthorCerisy
    • CommentTimeSep 17th 2018
     
    The contractor did that with our old Gite when they replaced the roof - most impressive. Forgot about that - only 15 years ago!!
    • CommentAuthorBeau
    • CommentTimeSep 17th 2018
     
    I tied in our end wall to the side wall with some rebar. Did this from the top by digging out some of the rubble infill and setting the rebar in with concrete. 10 years on no more cracks to date. The rest is lime pointing to help cope with smaller movement.
    • CommentAuthorMike1
    • CommentTimeSep 18th 2018
     
    Thanks for the feedback so far. Yes, a ring beam at roof level might be useful addition, and I would certainly envisage lots of lime pointing!
  2.  
    Do you want to keep the stone face? Otherwise forget the lime pointing and EWI
    • CommentAuthorMike1
    • CommentTimeSep 19th 2018
     
    Most of the walls are on the plot boundary, so as the thickness of EWI means it's unlikely to be viable it would mostly need to be IWI. The external face is currently a mixture of render and exposed stone - due to cracking much of the render will need replacing or stripping back to stonework. Internal cross-walls would largely remain as stone.
    •  
      CommentAuthordjh
    • CommentTimeSep 19th 2018
     
    Posted By: Mike1Most of the walls are on the plot boundary, so as the thickness of EWI means it's unlikely to be viable

    No chance of negotiating buying the space required I suppose?
    • CommentAuthorMike1
    • CommentTimeSep 20th 2018
     
    Theoretically on one elevation, but I wouldn't count on that.
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