Geotechnical engineers for North Shore
Our home ground. Waitematā sandstone and siltstone, expansive clays and coastal cliffs.
We are based in Takapuna, and the North Shore is where we do more work than anywhere else. Most of the Shore sits on East Coast Bays Formation: layers of sandstone and siltstone that weather into stiff, often expansive clays. On flat ground that usually means a careful look at shrink-swell for slabs. On slopes and cliff tops it means a proper stability assessment.
The gullies that run down to the harbour and the east coast often hide soft alluvium and old uncontrolled fill, which is where we see most settlement problems.
Ground conditions in North Shore
What we look out for
- Expansive clays that shrink and swell
- Slope instability on steep gully sides and coastal cliffs
- Coastal erosion along the East Coast Bays
- Soft ground in filled gullies and old stream beds
Typical projects
- Infill houses and minor dwellings on sloping sections
- Retaining walls and slip repairs
- Cliff-top setback assessments
- Townhouse developments under PC120
Our work in North Shore
Every site is different. Geology maps and council overlays are a starting point; a site-specific investigation confirms what is actually there.
Building in North Shore? Send us the site address and we'll tell you what geotechnical input you need.
You get a clear, fixed scope and fee up front. Prefer to talk? Call 09 218 6915 or email info@gibbritchie.co.nz.
