Gabion Baskets & Walls.
Engineering meets earthwork.

A properly built gabion wall lasts 50 to 100 years in Canadian climates, with the basket wire being the limiting factor. PVC-coated galvanized welded mesh — the standard for residential and decorative gabions — carries a 50-60 year design life. Galvanized-only welded mesh runs 30-50 years, accelerated by road salt or coastal salt spray. Heavy galfan or stainless mesh used in marine and infrastructure work pushes the life to 75-100+ years. The fill effectively lasts forever — what fails is the basket. Specify welded mesh (not woven) for retaining applications, a compacted gravel base with geotextile underlayment, and internal tension wires on walls taller than 1.5 m.

Gabion walls are usually 30-50% cheaper than poured-concrete retaining walls for the same retained height, with the gap widening on taller installs. Gabion supply runs $40-90 per square face foot installed (basket, fill, geotextile, base prep), depending on basket spec and stone choice. Poured-concrete retaining wall runs $80-180 per square face foot installed, more if engineered footings are required. Gabion's other cost advantages: no formwork, faster install, no curing time, drainage built-in through the stone fill (no weeping tile design), and stone fill can sometimes come from local quarries cheaper than imported aggregate. Concrete wins on: footprint (concrete wall is thinner, gabion needs 0.5-0.7× height in base width), aesthetics for high-finish architectural work, and very tall walls (over 4 m) where engineering favours concrete with rebar.

Gabion walls need a prepared base, not a concrete foundation in the conventional sense. The standard base is: excavate to bearing soil (typically 200-400 mm below grade and below frost for retaining walls in Canada), level the cut, install woven geotextile or non-woven filter fabric to stop fines migration, and place 150-300 mm of compacted granular A or 19 mm clear crushed stone as the bearing course. Tall retaining gabions (over 1.5 m) often add a wider base by stepping the bottom course, and engineered walls may require a 100-150 mm unreinforced concrete mud-slab or a compacted aggregate pad designed by a geotechnical engineer. Decorative gabions under 1 m height can sit on stripped topsoil with geotextile and 100 mm of gravel. Frost-line considerations: in Canada the base should sit below the local frost line for retaining or load-bearing applications.

Disadvantages of gabion walls: 1) Footprint — a retaining gabion needs 0.5-0.7× its height as base width, so a 2 m wall takes 1.0-1.4 m off your yard, much more than a concrete wall. 2) Aesthetic constraint — gabions look industrial; they don't match heritage or high-finish architectural styles unless you choose carefully sized stone. 3) Vegetation creep — seeds catch in the stone voids and weeds, mosses, small shrubs grow out of the wall face after 3-5 years; some homeowners like the look, some don't. 4) Basket corrosion timeline — even with PVC-coated mesh, the eventual failure mode is basket rust at the weld points; the wall doesn't fall but stones loosen and the face roughens over decades. 5) Stone supply — large clean stone can be expensive or unavailable far from quarries. 6) Pest harbour — small mammals and snakes use the voids; not an issue everywhere but a consideration.

Filled gabion wall pricing in Canada in 2026 runs $40 to $90 per square face foot installed for residential and landscaping applications, $90 to $180 for engineered retaining and infrastructure work. A typical residential 30 ft × 4 ft decorative gabion (120 sq ft of face) lands at $5,000-11,000 installed. Cost breakdown: PVC-coated welded baskets $8-22/sq ft of face, clean stone fill (granite, limestone, or local quarry) $15-30/cu yd delivered, geotextile $1-3/sq ft of footprint, base prep and excavation $10-25/sq ft, install labour $10-25/sq ft. Engineered tall walls add geotechnical consult ($2,000-8,000) and a design drawing for permit. Stone fill is the variable: local quarry stone is cheap; specified architectural stone (river rock, marble, basalt) can double the material cost.

A gabion is a wire mesh cage filled with stone or rock, used as a structural or landscape element. The name comes from the Italian gabbione, meaning "large cage." Modern gabions are factory-made welded-mesh boxes — typically 0.5×0.5×1.0 m or 1×1×2 m — wired together on site and filled with clean stone (granite, limestone, basalt, recycled concrete, or river rock). Gabion applications: retaining walls along driveways and slopes, erosion control on stream banks and shorelines, decorative landscape walls and seating, sound barriers along highways, security walls, military hesco-style fortification, and fence cladding for industrial sites. The strength comes from mass plus the interlock between stones; the mesh just keeps the stones in place. Properly built, a gabion structure is more durable than mortared stone — water passes through, freeze-thaw doesn't crack it, and individual stones can settle without compromising the wall.