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Lightweight material under hearth, what is it?

Discussion in 'Building' started by Douche, 20 Sep 2020.

  1. Douche

    Douche

    Joined:
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    Location:
    Yorkshire
    Country:
    United Kingdom
    Hi there,

    The tiles on the old hearth slab in our house have become loose. What's underneath them is a kind of cindery lightweight material that looks to have been backfilled, like you would with concrete, and strengthened with metal rods.
    What is this material please, it wouldn't be asbestos related would it?

    I've attached a file.
    Thank you,
    Douche
     

    Attached Files:

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  3. Douche

    Douche

    Joined:
    6 Mar 2011
    Messages:
    7
    Thanks Received:
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    Location:
    Yorkshire
    Country:
    United Kingdom
    Just to add this was done in the mid 80s.

    My first impression was that it might be a vermiculite based screed.....?
     
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