Needing urgent advice please.
Just found out our concretor has poured our slab and its 100mm below the height on our plans. They have advised that they can pour another slab over the top or leave as is.
Does anybody know if this is possible? Is it safe? Will it stand the test of time? Wont it be too heavy? Will they bond together ok? Should they make sure that an engineer says it's ok to do first? Should I get something in writing?
The home will be 2 storey on sand in Perth.