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Why is a Geotechnical report required on all subdivisions?
Most Council’s now require some certification that a suitable building site can be created on each new lot in terms of NZS 3604:1999 ‘Timber Framed Buildings’. For an engineer to certify this, a site visit and field testing is required. The engineer will examine surrounding slopes for stability and assess the bearing quality of the subsoils. The inherent strength of Taupo ash derived sub soils in the Cambridge area is generally assessed as being weak and need remedial work prior to house building. If a slab foundation is required, the engineers will often specify that subsoils are removed, replaced or re-compacted to bring them up to the strength requirements of NZS3604:1999.
