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Stone hearth in cellar broke off

Discussion in 'Building' started by Simplez, 4 Sep 2020.

  1. Simplez

    Simplez

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    So the stone slab that was under the fireplace in the living room above broke off.

    It was resting on a gas pipe which has been disconnected and moved out of the way. Once the slab was removed there was no shifting and the fireplace above remained solid but I do not want to leave it as is.

    The bricks on the right side protrude about 55cm and the left 38cm.

    What are my best options to repair this?

    1) Builder suggested laying breeze blocks flat and build an extra layer of blocks all the way to the top and not put the slab back as its cracked.

    2) Cement the broken slab back and then support it with a layer of engineering bricks.

    3) Cement the broken slab back and then place a concrete lintel that runs the length of the fireplace supporting both stone slabs.


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  3. JohnD

    JohnD

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    I think I'd jack it up, insert a steel or concrete beam, let the stone settle onto a soft bed of mortar.
     
  4. Simplez

    Simplez

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    You mean put the broken stone slab back and then place a concrete lintel under that.

    The lintel - can it rest on engineering brick or breeze block?
     
  5. JohnD

    JohnD

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    Lintel first, then slab.

    Easier to lower down than to push up.

    The slab will be resting on the lintel. I don't see a need for brick or blocks. I suppose you could form a new base of paving slabs on the lintel, and lower your stone slab onto a bed of mortar on that.
     
  6. Simplez

    Simplez

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    But what would the lintel be resting on?
     
  7. JohnD

    JohnD

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    The brickwork at the sides (unless you wanted to bolt in steel brackets)
     
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  9. Simplez

    Simplez

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    [​IMG]

    If you see this image - the brickwork at the sides is not at the same protrusion.

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  10. JohnD

    JohnD

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    Yes, I think take out a brick or two at the sides for the lintel. Probably also bolt something to the back wall, a piece of steel angle or channel (painted against rust)

    I don't think it will matter that the lintel will be on a slant.

    I wonder why they built it like that?

    If there is a chimney breast above I'm surprised it's not in 9" brickwork.
     
  11. Simplez

    Simplez

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    The bricks are 10cm wide - I thought that you need 15cm on either end of the lintel for support?
     
  12. JohnD

    JohnD

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    'Mmmm, but this is not a structural lintel holding the house up.
     
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  13. Simplez

    Simplez

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    Thank you for pointing that out. It's cleared a lot of confusion up for me!
     
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