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Retaining walls

Retaining wall drainage: questions to ask before rebuilding

Look beyond the face of the wall to water, support and the surrounding ground.

Start with what the wall supports

A wall beside a garden is not the same project as a wall supporting ground near a building or driveway. Record its approximate height and length and show the slope above and below it. Movement, bulging or cracking calls for assessment rather than a cosmetic cover-up.

Ask where the water will go

Drainage belongs in the wall design from the start. Ask how surface runoff will be managed, what drainage materials are specified and where collected water can discharge. A drainpipe behind a wall does not, by itself, address all water arriving from the rest of the property.

Confirm the design requirements

Before committing to a build, confirm permit and engineering requirements with the local authority. Height, site conditions and nearby structures can matter. The City of Nanaimo’s guide explains the local process; requirements elsewhere need a separate check.

Compare the hidden work

A wall estimate should make the excavation, supporting preparation, drainage, materials and restoration clear. A lower price is difficult to evaluate when one proposal leaves essential work undefined. Share photos of the access route as well as the wall itself.

Further reading: City of Nanaimo Retaining Wall Guide and Allan Block water-management guidance. General planning information is not a site-specific design.

Talk through your property with Clayton

Send photos, approximate dimensions and your project location. We can discuss the next assessment step and the scope that fits your property.

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