Gabion Retaining Walls
Every other wall type fights water. You build a drainage layer, run a coil, wrap it in geotextile and hope nobody blocks the outlet in fifteen years. A gabion wall has no back face to push against. Water.
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Built strong. Built to last.
Stone and Gabion Retaining Walls in Christchurch
Top Retaining Walls Christchurch builds stone and gabion retaining walls across Christchurch using stone that comes from Canterbury. Halswell basalt, Oxford basalt, Port Hills volcanic rock, Timaru bluestone, schist and river boulders all sit within a short truck run of the city, which keeps the cost sensible and makes the finished wall look like part of the site.
- Gabion baskets drain through the face so pressure never builds
- We source basalt, schist and river rock from Canterbury quarries
- Boulder walls placed rock by rock with a 5 tonne digger
- Drainage on every wall300mm of metal, a drain coil and geotextile. Never an optional extra.
- H5 poles as standardThe right treatment for timber that lives in wet ground.
- Consents handledChristchurch City, Selwyn and Waimakariri, start to finish.
- Itemised quotesYou see what the drainage and the spoil actually cost.
Stone and Gabion Retaining Walls
Stone and Gabion Retaining Walls we build in Christchurch
Gabion walls are the practical end of this category. A gabion is a galvanised or PVC coated wire basket packed with 100mm to 200mm rock, and it works as a gravity wall. Water runs straight through the face, so hydrostatic pressure never builds up, and the basket flexes slightly instead of cracking when the ground moves. That flexibility is worth something in Canterbury.
Boulder and dry stone walls sit at the other end. They cost more per metre because a machine operator places every rock by hand and each one has to sit on three points of contact. What you get back is a wall with no visible manufactured edge anywhere on it.
Boulder Retaining Walls
An operator picks up a rock, offers it to the wall, turns it, sets it down, and often picks it back up and tries a different face. Each boulder has to bear on three points of contact against the rocks.
Read moreSchist Retaining Walls
There are two ways to build this. A solid schist wall is a genuine stone structure, laid course by course with the stone doing the retaining. A faced wall uses a concrete block or poured wall behind, with.
Read moreBasalt Rock Retaining Walls
Halswell Quarry ran from about 1861 until 1990 and supplied the distinctive blue grey stone used in the Canterbury Provincial Council Buildings, the Durham Street Methodist Church and the Sign of the.
Read moreDry Stone Retaining Walls
The wall has two faces with smaller stone packed between them, and long through stones set at intervals to tie both faces into one structure. The courses lean back into the bank slightly, and each stone.
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The part you never see
How we build a retaining wall that drains
Nearly every failed wall we get called to in Christchurch failed the same way. Water sat behind it, the soil got heavy, and the wall leaned out a little more each winter. So we build the drainage first and the face second.
- At least 300mm of clean free draining metal sits behind the wall face
- A perforated drain coil runs the full length at the base
- Geotextile cloth wraps the top and back so silt cannot block it
- The coil discharges to daylight or to stormwater, never a dead end
Where we work
Stone and Gabion Retaining Walls across Christchurch and Canterbury
We cover the whole city plus the Selwyn and Waimakariri towns within a sensible drive.
Not sure which wall type suits your section?
We will come out, measure it and tell you straight. The site visit and the written quote are both free.