How do I fix a sinking foundation in Miramichi NB?

A sinking foundation in Miramichi — or anywhere in New Brunswick — is a serious structural issue that requires professional assessment before any repair work begins. Do not attempt to diagnose or repair a sinking foundation on your own. The appropriate repair depends on why the foundation is sinking, and the wrong repair will waste money without solving the problem.

Miramichi sits along the Miramichi River and has soils that vary from sandy alluvial deposits near the river to glacial till further inland. River valley communities are particularly susceptible to foundation settlement from two main causes: weak or organic soil beneath the footings (peat, organic fill, or soft clay that compresses under load over time) and soil erosion from spring flooding and seasonal water table changes that washes fine particles out from under footings.

Signs of foundation settlement in Miramichi homes: Cracks radiating diagonally from window and door corners, doors and windows that stick or will no longer close properly, floors that slope noticeably toward one area, gaps opening between the wall and floor or ceiling, and visible tilting or separation at the foundation corners. If you are seeing multiple symptoms together, the foundation is likely moving.

Common repair options — chosen based on the cause and degree of settlement:

Underpinning with push piers or helical piers transfers the foundation load past the weak soil to deeper, stable bearing strata. This is the most permanent solution for significant settlement caused by weak soil and is increasingly common in NB river valley communities. Hydraulic push piers or helical piers are installed through the footing and driven to refusal at firm bearing. Cost typically runs $1,000-$2,500 per pier, with most foundations requiring 6-15 piers.

Mudjacking or poly levelling injects grout or expanding foam beneath the footing slab to fill voids and lift the concrete. This is appropriate for slabs and small concrete structures but is not a structural solution for a settling house foundation wall — it addresses settlement due to voids, not soft soil.

Drainage correction — if water is the root cause (soil erosion from poor drainage or high water table), improving the drainage around the foundation through regrading, extending downspouts, and restoring or installing weeping tile is an essential part of any repair plan. Fixing the structural symptom without fixing the water source is a temporary solution.

Always get a structural engineering assessment before committing to a repair approach. New Brunswick Concrete can match you with foundation specialists in the Miramichi area who are experienced with local soil conditions.