23/10/2026
A retaining wall does not have to be perfectly straight or crack-free to be doing its job.
What matters is whether something is changing.
Warning signs worth watching:
• The wall is leaning farther outward
• Sections are bowing or separating
• Cracks are widening or surfaces have shifted
• Soil is washing out from behind or below it
• Water regularly collects behind the wall
• The ground above it is settling
• A driveway, fence, patio, or stairs nearby are moving too
• Timber walls are soft, rotten, splitting, or pulling apart
Around Seattle, drainage is especially important. Saturated soil gets heavier, and water trapped behind a wall can increase pressure substantially.
If you are not sure whether a condition is old and stable, take photos from the same location and track it over time. If movement is obvious, water is causing erosion, or the wall supports a house, driveway, or neighboring property, that is the point to get a professional evaluation.