I have a damp issue due to a block paved driveway breaching the DPC / it was built up and covering air bricks. I have lifted the first 2 rows of brick, to find the base is concrete. Suggestions are that I break the concrete out, excavate and then back fill with 40-50mm stones. The DPC is just above the air bricks shown in the picture
However, to avoid breaking out the concrete do you think the I could drill drainage holes in to the slab instead?
If I do need to break out the concrete, would you suggest a jack hammer?
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