Screw Piles – Frequently Asked Questions (FAQ)
1. What are screw piles?
Screw piles (also known as helical piles or helical piers) are deep foundation solutions made of steel shafts with helical plates welded to them. They are screwed into the ground to support structures such as buildings, modulars, pools and more.
2. How do screw piles work?
Screw piles are rotated into the ground using a excavator and drive motor. The helical plates pull the pile into the soil allowing it to reach the required depth and load-bearing capacity specified by a engineer. Once in place, they provide strong, stable foundations.
3. What are the benefits of screw piles over traditional concrete foundations?
Quick installation (often within hours)No curing time (can build immediately) ,Minimal excavation, Works in most soil conditions, Environmentally friendly and ideal for tight or remote areas
4. What types of projects are screw piles suitable for?
Screw piles are versatile and commonly used in: Residential homes, modular structures, pools, Commercial and industrial buildings, Boardwalks and marine structures.
5. Can screw piles be used for both new builds and renovations?
Yes. Screw piles are excellent for new construction as well as retrofit projects or foundation repairs. They can be installed next to or under existing structures with minimal disruption.
6. How long do screw piles last?
When properly designed and installed, screw piles can last 50+ years. Many are coated with galvanized steel or other protective materials to enhance longevity and resist corrosion.
7. Are screw piles suitable for all soil types?
Screw piles work in a wide range of soils, including clay, silt, sand, and loam. However, they may not be ideal in very rocky or dense cobble soils, where pre-drilling might be required.
8. How much weight can a screw pile support?
Load capacity varies based on pile design, soil type, and depth. Standard residential screw piles can typically support 2,000–10,000+ kgs each. Load testing can confirm exact capacity.
9. Can screw piles be removed?
Yes. Screw piles are fully removable, making them ideal for temporary structures or eco-sensitive projects.
10. What equipment is needed to install screw piles?
Installation typically requires a drive motor mounted on excavators, skid steers, or handheld units for small projects. The machinery depends on pile size and site conditions.
11. Are screw piles building-code approved?
Yes. Screw piles comply with most building codes when engineered and installed properly. Always check local regulations and obtain necessary permits.
12. How much do screw piles cost?
Costs vary based on, project size, soil conditions, pile size and depth.
13. Do I need a structural engineer for screw piles?
Engineering and load calculations are highly recommended or mandated.
14. How do I know if screw piles are right for my project?
Speak with a qualified installer or geotechnical engineer. They’ll assess soil conditions, load requirements, and site access to determine if screw piles are the best option.
