A modular or prefab home is built in a factory in a matter of weeks, then delivered on a fixed date. The foundation has to be finished, and dead level, before the modules arrive. That is where concrete often slows a project down.
Helical screw piles are a faster way to get a prefab home ready. Here is why they fit, and what to line up before delivery day.
The problem with concrete on a prefab schedule
- Time. Excavating, forming, pouring and curing add days to weeks before anything can be set on the foundation.
- Weather. A wet or frozen week can push back a pour, but the delivery slot for the modules does not move.
- Mess and access. Concrete trucks and excavation tear up the lot, which matters on tight sites and landscaped properties.
Why helical piles fit
A helical pile is a steel shaft with a helix at the bottom that is screwed into the ground to firm soil. There is no excavation and no concrete, and most residential foundations are finished in a day.
- Built for precision. Our installation equipment monitors torque as each pile goes in, so we can confirm it has reached the strength it was chosen for. The piles are then cut and capped to the exact elevation your home needs, so the modules meet cleanly.
- Works on difficult lots. Pile heights are adjusted one by one, so a sloped lot does not need heavy earthworks. On soft or organic ground, as around Cultus Lake and Agassiz, the piles pass through the soft layer to firm soil below.
- Weather is not a blocker. Piles are driven in mechanically, so rain and cold snaps do not stop the work the way they stop a pour. Heavy rain or flooding can still affect site access, so timing is confirmed before the crew arrives.
- Removable. Piles can be unscrewed if the home is ever moved.
Engineering and approvals
Postech piles hold a CCMC evaluation (#13102-R), which building officials across Canada recognize for use under the National Building Code. Permit and drawing requirements still depend on your municipality and your project, so check them early. We can supply engineering documentation when it is required, and the piles are installed by certified dealers trained in torque verification and load calculation.
Before delivery day: a checklist
- Get the weight, dimensions and support points of the home from the manufacturer. The pile layout is based on them.
- Decide the finished floor height above the ground, including any skirting or steps.
- Confirm how the modules will be delivered and set, and whether a crane or truck needs access to the pad.
- Check permits and zoning with your municipality before you order.
- Have underground utilities located before any ground work. BC 1 Call is a free service.
- Book the piles first and share the delivery date, so the foundation is finished with time to spare.
Quick answers
How long does a modular home foundation take? Most residential foundations are finished in a day. We give you a realistic timeline with your quote, based on the number of piles, the soil and the site.
Can piles be installed in winter? Yes. Piles are driven in mechanically, and frozen surface ground is usually not a problem because the piles go well below it.
Is there a warranty? Postech piles carry a limited lifetime warranty against frost heave when installed by a certified Postech dealer.
Where we install them
We build foundations for tiny homes and mobile homes and cabins and cottages across the Fraser Valley, including sloped lots like our Ryder Lake tiny home project. Send us your site details and we will price it free, with no obligation.
