How do I fix a leaning retaining wall in NB?

A leaning retaining wall in New Brunswick is a structural warning that requires professional assessment — do not ignore it or attempt a cosmetic fix. The lean indicates that the wall is experiencing forces it was not designed to resist, and the underlying cause must be identified and corrected, not just the visible symptom.

The first step is to determine whether the wall has moved recently and is still moving, or whether the lean is historical and stable. A wall that leaned 2 inches a decade ago and has not changed is a different situation from a wall that has moved 1 inch in the past spring. If you have any reason to believe the wall is actively moving — fresh cracks, displaced blocks, or visible gaps forming at the top — keep people clear of the area and call a professional immediately. A wall in active failure can overturn with little warning.

For walls that have leaned but appear stable, the professional assessment will determine the cause. The most common causes in NB are poor drainage (hydrostatic pressure from spring thaw), inadequate footing depth (frost heave), or inadequate wall section for the soil being retained. The cause determines the fix. A wall leaning because of drainage problems may be salvageable with improved drainage and some form of tiebacks or deadmen anchors. A wall leaning because the footing heaved from frost typically needs to be demolished and rebuilt with a proper below-frost-line footing.

Repair options for leaning retaining walls, depending on severity and cause:

Deadman anchors or tiebacks: For poured concrete or CMU walls that have tilted but are structurally intact, horizontal anchors driven into the retained soil and attached to the wall can arrest further movement and may gradually correct minor lean. This is a specialist repair involving geotechnical anchor equipment and is not a DIY project.

Drainage remediation: If the lean is caused by water pressure, improving drainage by installing or clearing weeping tile and adding drainage stone behind the wall can relieve pressure and stabilize a wall that has not yet failed structurally.

Partial or full reconstruction: For walls that have moved significantly or where the footing is clearly compromised, partial or full demolition and rebuilding is often the only proper solution. This is particularly true for walls on properties in Fredericton, Moncton, and Riverview where frost heave has been working on an under-depth footing for years.

Do not attempt to push a leaning wall back upright with equipment — this creates a significant collapse risk. Any wall over 3 feet that is noticeably leaning should be assessed by a professional structural engineer or an experienced retaining wall contractor before any work is done.

New Brunswick Concrete can match you with experienced retaining wall professionals in Moncton, Fredericton, Saint John, Miramichi, Bathurst, and Dieppe for a proper site assessment.