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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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  1.  
    I laid a lime screed this weekend. Turned out reasonably well, but there are a few small shrinkage cracks. What should I do with them? I was wondering if I should fill them in with neat lime. Any suggestions?
    • CommentAuthorgyrogear
    • CommentTimeJul 9th 2020
     
    I'd give it a good wetting (repeated) and trowel it, to try & get some laitence up to fill the crack; then add extra lime only if required. I have actually used OPC for repairs, it comes out looking a bit black... so no good cosmetically but it does work.

    gg
    •  
      CommentAuthordjh
    • CommentTimeJul 9th 2020
     
    Posted By: ComeOnPilgrimI laid a lime screed this weekend.

    Hydraulic or 'air' lime?

    Repeatedly compressing air lime as it gets gradually harder is the key to dealing with cracks and as gg says, wetting helps to slow it all down and even partially reverse it. Hydraulic lime just keeps on setting AFAIK, so you have to keep ahead of it. I would guess adding some lime to fill the cracks would help, but you might need to widen and roughen the cracks to give a good key. But I'm no expert.
    • CommentAuthortychwarel
    • CommentTimeJul 9th 2020
     
    make up some concentrated lime water and pour it into the cracks.
  2.  
    Thanks for the advice. It's hydraulic lime. It's gone incredibly hard after just a few days, being damp all the time. I don't fancy my chances of working it. I probably should have worked it more at the time. Looks like I'll have to fill in the cracks with fresh material. Probably best to do that soon I guess.
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