Guides
Screw piles, explained.
Plain answers on how screw piles work, what they can carry, the ground they suit, how they're installed and how they fit the Building Code.
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How screw piles work
A steel shaft with helix plates, screwed into the ground until it reaches firm soil. What each part does, and why it works.
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Screw piles vs concrete piles
Both hold a building up. The difference is how they go in, how long you wait, and the mess left behind.
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How much can a screw pile carry?
It depends on the pile and, above all, on the ground. How the capacity is worked out, and checked at every pile.
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Screw piles in New Zealand ground
From Auckland clays to Waikato peat and Bay of Plenty pumice: how screw piles cope with the ground across our patch.
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How we install screw piles
From the site check to the torque record: what happens on install day, and what you get at the end.
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Corrosion and durability
Steel in the ground lasts when it's protected and sized for the site. How durability is worked out.
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Screw piles and the Building Code
How screw pile foundations fit with consents, engineering and sign-off in New Zealand.
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Planning a screw pile foundation
What to have ready, what to ask any installer, and what affects the price.
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Got a question we haven't covered?
Ask us. We're happy to talk through your site, your ground or your plans, and there's no charge for a quote.