I have been reading the topics on slab heave and want to make sure our build gets off to the right start.
Our engineers report says that pre-wetting the block is mandatory for our block. The house was demolished in February and there has been very little rain since. However the builder says that pre-wetting is not required.
Our soil is very reactive and is a Class E-D, P (TREE) site. The trees have been removed but there will still be roots underground. The engineers report stated that the area should be watered with a sprinkler for 2 hours each day for 10 days before earthworks start.
Footing type is reinforced concrete raft footings continuously trenched or piered to 200 mm into natural ground. Here is a pic with more technical details
Have others been in this situation? What is the impact if the soil is not pre-wet before they start earthworks? Can you make the soil too wet?