Oh if it's collapsing , it probably means the foundation is not suitable so you will need to check and sort that out too or it will just collapse again
Great, looks like it's 1 cement and 3 sand from the calculator.
Thinking of digging down a bit deeper for the base blocks that the walls sits on to stop it falling over again. It has survived 20+ years before falling down though so another 20 years will do me.
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