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Conservatory base

Discussion in 'Building' started by Neil Meyer, 7 Oct 2021.

  1. Neil Meyer

    Neil Meyer

    7 Oct 2021
    Thanks Received:
    United Kingdom
    I am having difficulty getting the correct answer. I've had 2 different builders telling me completely different answers.
    I am looking a build a conservatory/ garden room joined to the back of my house. There is already a 3m longe by 2m wide concrete slab. This is approximately 300mm deep. I want to build 3mx3m. So my question is
    Can I use the concrete base and build a trench out 1m to get the desired size or do I need to remove the base and dig in a new trench entirely?
    I plan to use breeze blocks to create a double skinned dwarf wall.
    Additionally, do I need a damp course on the original base or wil the blocks do this ?
    Thanks Neil
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