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Cracked Thermolite blocks in garage?

Discussion in 'Building' started by deano37, 18 Jan 2021.

  1. deano37

    deano37

    Joined:
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    Country:
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    Hi There.

    I would be very grateful if somebody could offer some advice on what could be the cause of cracked thermolite blocks that i have seen on a recent property viewing?

    The cracked blocks are on the 3 internal garage walls, vertical cracks floor to ceiling spaced about 1 - 2 ft apart, so quite a few.







    Do these blocks provide
    structural strength or are they more for insulation?
    The external brickwork has no cracks. The property is 23 years old.

    I must admit it does look quite worrying when viewing a property that you like.

    Any information is much appreciated

    Deano
     

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  3. ^woody^

    ^woody^

    Joined:
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    Location:
    West Mids
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    It's common, and can happen any time even after decades.

    Its shrinkage, the mortar is too strong, so the blocks cracks with temperature or humidity changes - or excess moisture in the cavity. I suspect that very house built with those blocks has some cracks like that.

    Typically they can be left and the wall will be OK.
     
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