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  • Crumbs, thanks for that reply. Nothing is ever simple when rectifying 50 years of bodges, looks like more wall scrubbing is in my future then. Then spraying and more scrubbing.
    I'll probably primer it first as well. Or tank with slurry then primer. Lovely.

    @TW It's a utility room that was created by covering over an old alleyway, and the wall to the left is a retaining wall.

    The guy installing boiler wasn't happy to put the new one where the old was (on that left wall) as it was rusting out.

  • the wall to the left is a retaining wall.

    Chemical tanking may be your best bet then, if the ground is not well draining on the other side.

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