Bored Piers and Screw Piles FAQs
A quick-reference collection of the most common questions we hear about bored piers and screw piles, with links through to the full guides.
When Deep Foundations Are Needed
Deep foundations like bored piers and screw piles are used where standard slab-on-ground systems aren’t suitable — see our foundation design 101 guide for how this is determined.
Bored Piers vs Screw Piles
See our bored piers vs screw piles comparison for the full detail on how these two systems differ and which suits which site conditions.
Use in Retaining Walls
Both systems are also used in retaining wall construction — see our bored pier retaining walls and screw pile retaining walls guides.
Cost and Process
See our cost comparison guide for how pricing between the two systems typically compares for your project.
Recently Completed Projects
We complete residential and commercial concrete, excavation and foundation projects across Melbourne every week. Explore our project gallery to see the range of work we deliver.
Frequently Asked Questions
When are bored piers or screw piles needed instead of a standard slab?
Where standard slab-on-ground systems aren’t suitable — typically driven by soil classification, filled land, or sloping sites.
What's the main difference between bored piers and screw piles?
They use different installation methods and suit somewhat different site conditions — see our full comparison guide for the detail.
Can bored piers and screw piles be used for retaining walls too?
Yes, both systems are also used in retaining wall construction as a post/footing system.
Which is cheaper, bored piers or screw piles?
It depends on your specific site and project — see our cost comparison guide for how pricing typically compares.
Who decides between bored piers and screw piles for my project?
Your structural engineer, based on your site’s soil conditions and the loads involved.
Related Guides, Calculators & Services
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