Step 1 - Remove topsoil and subsoil to required depth
Step 2 - Compact sub base if required
Step 3 - Add base coarse and compact to final foundation level
Step 4 - Assemble baskets
Gabion baskets for retaining walls come in a variety of sizes
New Zealand wide delivery, with freight charged at cost.
Email firstname.lastname@example.org with the wall height, width and your location for a delivered price
Questions and Answers
Q. Do I need all this heavy equipment for a 600mm tall wall?
A. Generally for walls under 1.0m tall on firm ground; all you need to do is remove the first 100mm of topsoil and replace with gravel.
Q. How much base coarse do I need?
A. Large walls on a soft sub base may need 300mm or more, while a small wall on a firm sub base may only need 25mm .
Q. Do I need a concrete foundation?
A. Most gabion walls can be built without a concrete foundation, however some supported walls and special engineer designed walls may require a concrete foundation.
Q. How test if my sub base is strong enough?
A. Engineers use a scala penetrometer to do foundation testing. A simple soil stenght test is to hammer a 12mm steel rod 500mm into the sub base, if you can do this easily your base needs to be replaced with base coarse.
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