Greeting everyone
Just confuse in regards to significant soil report/ cost site done by builder for block of land in north Brisbane.
House built area 260 single story
First report
Site class P due to previous tree and soil has low bearing capacity
Soil tyre 75 (ys)
Solution : E class slab and screw pier
Cost for E class slab 24 K, and Screw pier 32 K
Had another soil test with different company
Result
Site class P due to previous tree , does not mention soil low bearing capacity like previous report.
Slab recommended H1 and concrete pier, has not mentioned about any screw pier
Site cost
H1 was already included in quote, so for concrete pier site cost 21K
I am just curious how come two company has significant soil test report and recommendation for totally different slab classification.
Of course I would go with low cost slab recommendation, but just would like to know any one has come across like this situation.
Thanks in advance.