Identifying concrete blocks (CMU)

Discussion in 'Builders' Talk' started by phloaw, Dec 12, 2021.

  1. phloaw

    phloaw Member

    Hello, this is a house in UK, built in the early '70s.
    Some parts of the outer walls are made of concrete blocks.
    I suppose they are one of the usual types: e.g., aggregate, lightweight or aircrete, but I'm not sure which one.
    I would like to know in order to buy the appropriate anchors/fixings.
    Any suggestion/input welcome.
    Their size is approximately 44.5x22cm, they have no identifying signs or marks visible.
    I attach pics.
    TIA
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    Last edited: Dec 12, 2021
  2. stevie22

    stevie22 Screwfix Select

    What do you want to fix?

    Usually just use plastic plus for most things and the only thing I might do is use a slightly smaller drill in soft blocks so the plugs fir a bit tighter.
     
    phloaw likes this.
  3. phloaw

    phloaw Member

    Thanks. I'd still like to know whether those blocks are standard breeze blocks (aka aggregate) or aircrete (aka thermalite). Any guess?
     
  4. stuart44

    stuart44 Screwfix Select

    AAC blocks are quite soft. Can you push a screw driver into them when twisting it a bit.
     
    phloaw likes this.

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