“The crew had our deck foundation installed in under 4 hours. No concrete trucks, no mess, no waiting. Absolutely the best experience we've had with any contractor.”
Mark L.
Chilliwack, BC
1 / 3
Helical Pile Foundations — Chilliwack & Fraser ValleyBuild Stronger.
Build on Postech.
Engineered screw pile foundations for homes, decks, tiny homes, and cottages. Installed in hours — backed by a limited lifetime warranty.
Get a Free QuoteWhat We Do
Residential Solutions
01
Sheds & Carports
Full helical pile foundation systems for new builds — additions, garages, and full homes. Installed in hours.
Sheds & Carports foundations02
Cottages & Cabins
Remote-access friendly foundations for lakeside cottages, cabins, and seasonal structures across the Fraser Valley.
Cottages & Cabins foundations03
Decks & Pergolas
Residential deck, patio, and pergola foundations that won't shift, sink, or heave. Backed by a limited lifetime warranty against frost heave.
Decks & Pergolas foundations04
Tiny & Mobile Homes
Purpose-built screw pile foundations for tiny homes, mobile homes, and modular structures. Level, stable, and code-compliant.
Tiny & Mobile Homes foundationsPostech Exclusive
Thermal Barrier
Technology
Every Postech pile is filled with high-density polyurethane thermal foam during installation — a patented process that eliminates frost heave and condensation, protecting your structure year-round.
How does it prevent frost heave?
The thermal foam creates a continuous insulation barrier inside the steel shaft. This prevents the transfer of cold from the frozen ground to the structure above, eliminating the upward force (frost heave) that damages traditional concrete foundations.
How are the piles protected from corrosion?
All Postech piles are manufactured with high-quality galvanized steel under CWB-conformant welding standards. The zinc coating provides decades of corrosion resistance in all BC soil conditions.
Are Postech screw piles certified in Canada?
Postech has held Canadian Construction Materials Centre (CCMC) certification since 2003, conforming with the National Building Code (NBC) and CSA standards. Every installation is backed by engineering documentation.
Independently Certified
- CCMC
Canadian Construction Materials Centre evaluation #13102-R, held since 2003
- ICC-ES
U.S. evaluation for the International Building and Residential Codes
- ISO 9001
Quality-managed manufacturing
- CWB
Certified steel fabrication and welding
Certifications held by Postech, the pile manufacturer.
Straight Talk
Screw Piles vs Concrete
Concrete is still the right call for some jobs — a full slab or a poured basement wall, for example. For decks, additions, sheds, cabins, tiny homes and similar structures, screw piles do the same job faster and with far less mess.
| Factor | Poured Concrete | Postech Screw Piles |
|---|---|---|
| Time on site | Several days of work, then a day or two of curing before you can build | Usually one day — build right after |
| Digging & mess | Excavation, forms, a concrete truck and site cleanup | No excavation, no spoil, no wet concrete |
| Weather | Rain and freezing temperatures disrupt a pour | Installed mechanically in most conditions |
| Frost | Footings must be deep enough or they can heave | Driven below the frost line into stable soil |
| Load check | Capacity relies on design assumptions about the soil | Torque is monitored as each pile goes in |
| Later changes | Permanent once poured | Piles can be removed if the structure comes down |
Time on site
- Poured Concrete
- Several days of work, then a day or two of curing before you can build
- Postech Screw Piles
- Usually one day — build right after
Digging & mess
- Poured Concrete
- Excavation, forms, a concrete truck and site cleanup
- Postech Screw Piles
- No excavation, no spoil, no wet concrete
Weather
- Poured Concrete
- Rain and freezing temperatures disrupt a pour
- Postech Screw Piles
- Installed mechanically in most conditions
Frost
- Poured Concrete
- Footings must be deep enough or they can heave
- Postech Screw Piles
- Driven below the frost line into stable soil
Load check
- Poured Concrete
- Capacity relies on design assumptions about the soil
- Postech Screw Piles
- Torque is monitored as each pile goes in
Later changes
- Poured Concrete
- Permanent once poured
- Postech Screw Piles
- Piles can be removed if the structure comes down
Engineering Data
Pile Specifications
All models available in 7' and 10' standard lengths. Custom lengths engineered on request.
| Model | Diameter | Load | Specs |
|---|---|---|---|
| P238 | 60.3 mm (2⅜") | 15,000 lbs | Technical Sheet |
| P278 | 73.0 mm (2⅞") | 25,000 lbs | Technical Sheet |
| P312 | 88.9 mm (3½") | 35,000 lbs | Technical Sheet |
| P412 | 114.3 mm (4½") | 45,000 lbs | Technical Sheet |
Engineered For
Every Soil Condition
Fraser Valley Conditions
Works In Any Soil
01
Sand & Gravel
Common in Fraser Valley floodplains. Excellent bearing capacity with helical piles.
02
Clay & Silt
Cohesive soils found throughout Chilliwack agricultural zones. Our piles anchor past the active zone.
03
Rocky Terrain
Shallow bedrock and glacial till in Columbia Valley and Harrison areas. Pilot-pointed piles penetrate with precision.
04
Organic & Peat
Wetland-adjacent soils near Cultus Lake and Agassiz. Piles reach stable bearing strata below.
Surgical Accuracy
Precision In Motion
What helical piles carry, from decks and cabins to sunrooms, sheds and industrial sites, and how they go in.
OUTDOOR LIVINGDecks and Pergolas
ELEVATEDRaised Decks and Stairs
SOFT GROUNDWaterfront Decks
RETREATSCabins and Cottages
LEVEL BASETiny Homes
DELIVERY READYManufactured Homes
SLOPED SITESHillside Builds
NO CONCRETESheds and Outbuildings
BACKYARDGarden Studios
ENCLOSEDSunrooms
ADDITIONSHome Additions
RECREATIONALPlaygrounds
LOW IMPACTBoardwalks and Walkways
TORQUE VERIFIEDPrecision Installation
COMPACT EQUIPMENTTight-Access Installs
RUST-PROOFHot-Dip Galvanized
CUT TO HEIGHTPost and Beam Connections
INDUSTRIALGrade Beams and Industrial
HEAVY DUTYSolar Array Foundations
FULL SYSTEMSCommercial and Industrial
Decks and Pergolas
Pergolas and decks on helical piles stay level, and framing can start without waiting for concrete to cure.
Raised Decks and Stairs
Tall decks with stairs and glass railings need steady posts. Pile sizes are chosen for the height and the load.
Waterfront Decks
Lakeside decks and platforms on soft or wet ground, with the piles reaching firm soil below.
Cabins and Cottages
Cabin and cottage floors carried on piles, with no concrete footings to dig and pour on a wooded lot.
Tiny Homes
A tiny home on a few accurately placed piles stays level, with no concrete pour.
Manufactured Homes
Manufactured and modular homes set on piles, with the foundation finished before delivery day.
Hillside Builds
On a slope, each pile is cut to its own height, so the floor frame sits level without heavy earthworks.
Sheds and Outbuildings
Sheds and workshops sit level on piles with no pad to pour, even on soft or sloping ground.
Garden Studios
Studios, offices and garden rooms on a handful of piles, with little disturbance to the lawn.
Sunrooms
Sunrooms and enclosed porches supported on piles, without the dig and the concrete of a footing wall.
Home Additions
Additions and raised floors carried on steel piles, with the space underneath left open.
Playgrounds
Safe, level, concrete-free anchors for municipal and backyard play structures.
Boardwalks and Walkways
Stable raised paths with minimal disturbance to the ground around them.
Precision Installation
Each pile is driven to its marked position while torque is monitored, so its strength is confirmed as it goes in.
Tight-Access Installs
Compact machines work in backyards and beside existing structures, with far less disruption than excavation.
Hot-Dip Galvanized
Hot-dip galvanized steel shafts and helixes resist corrosion in the ground.
Post and Beam Connections
A pile cap and bracket carry the post or beam directly, cut to the exact finished height.
Grade Beams and Industrial
High-precision anchoring for structural grade beams and heavy commercial loads.
Solar Array Foundations
Fast to install, accurately aligned and resistant to uplift for solar arrays.
Commercial and Industrial
High-capacity helical systems for heavy-duty structural support.
Client Feedback
What They Say
“We needed a foundation for our tiny home on a sloped lot near Cultus Lake. They engineered the perfect solution — level, solid, and done in one day.”
Sarah T.
Cultus Lake, BC
2 / 3
“Professional from start to finish. The engineering report was thorough and the installation was surgical. Our cottage hasn't moved a millimeter in two winters.”
Steve P.
Harrison Hot Springs, BC
3 / 3
Insight & Engineering
The Foundation Blog
Expert advice on soil mechanics, thermal insulation, and building code compliance in the Fraser Valley.
Outdoor Living4 min read
Sheds, Carports and Covered Decks: Helical Piles vs Concrete
Rain, soft ground and wind test every outdoor structure. See why helical screw piles beat concrete footings for sheds, carports and covered decks.
Read Article
Modular Homes4 min read
Modular Home Foundation Checklist: Be Ready by Delivery Day
Factory-built homes arrive on a fixed date. Here is what to line up, and why helical screw piles get a modular foundation ready in about a day.
Read Article
Residential3 min read
Stop a Hot Tub From Tilting: Foundations for Soft Chilliwack Soil
A filled hot tub is a heavy load on a small footprint. See how helical screw piles stop it tilting, even in soft or sloped Chilliwack soil.
Read Article
Good To Know
Common Questions
Straight answers about cost, timing, weather and warranty. Don't see yours? Ask us — we reply within 24 hours.
Ask Us DirectlyHow much does a screw pile foundation cost?
It depends on how many piles your project needs, the pile size, your soil, and how easy the site is to reach. A small deck needs far fewer piles than a house addition, so there's no honest flat number. Send us your project details and a few photos through the form below and we'll price it for you — free, with no obligation.
Are screw piles as strong as concrete footings?
For decks, sheds, additions, cabins and other residential and light commercial structures, yes. Each pile is selected for an engineered load capacity, and our installation equipment monitors torque as the pile goes in, so we can confirm it is reaching the soil strength it was chosen for. Concrete is poured based on what the soil is assumed to be; a pile is checked as it is installed.
How long does installation take?
Most residential projects are finished in a day — often just a few hours for a deck or shed — and you can usually start building right away, because there is no concrete to cure. Larger or more complex jobs take longer, and we'll give you a realistic timeline with your quote.
Can piles be installed in winter or in the rain?
Yes. Piles are driven in mechanically, so wet weather and cold snaps don't halt the work the way they halt a concrete pour, and frozen surface ground is usually not a problem because the piles go well below it. Heavy rain or flooding can still affect site access, so we'll confirm timing with you before the crew arrives.
What about sloped yards or tight access?
Pile heights are adjusted in the field, so a structure can be brought to level on sloped ground. For tight backyards and narrow gates we can use compact equipment. Tell us about access when you send your project details and we'll plan around it.
Will installation tear up my yard?
Far less than concrete would. There is no excavation, no spoil pile and no formwork, so lawns, gardens and nearby trees are mostly left alone. Expect a small machine and a crew on site for the day.
What does the warranty cover?
Postech installations carry a limited lifetime warranty against frost heave when they are installed by a certified Postech dealer. Ask us for the written warranty terms before work starts so you know exactly what is and isn't covered.
Can I install Postech piles myself?
No. Postech piles are installed by certified dealers who are trained in equipment calibration, torque verification, load calculation and code compliance. A do-it-yourself installation would not be covered by the warranty and may not meet code for a permitted structure.
Will my building inspector accept screw piles?
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 we'll tell you what to expect for your site and can supply engineering documentation when it is required.
How do I get started?
Use the quote form below, or call 604-819-5884 with a rough description of the project, the location and a few photos of the site. We'll reply within 24 hours with next steps and arrange a site visit if one is needed.
Project Initiation
Secure Your
Foundation
Ready to start your project? Fill out the form for a free, no-obligation estimate or call us directly.
Service Area
- Chilliwack
- Agassiz
- Yarrow
- Harrison
- Cultus Lake
- Rosedale
- Deroche
- Bridal Falls
- Greendale
- Popkum
- Ryder Lake
- Columbia Valley