Guys,I need your input:
I have signed contract for building 28sq dwelling with slab class H (min. 230mm freeboard).
Soil test report stated: site classification = Class H; site fall=250mm; slab beam=0.3 - 0.5m
recommended footing=Slab on Ground class H
After foundation completed, I was charged for 24m3 additional concrete $4K?
Question is : When we have agreed for class H slab,why there is still extra cost for additional concrete?who is liable for this extra cost; builder or owner?