BaseCheck
Foundation Triage Report · Public beta
Example · Photo Scan · New Zealand
Elevated
Worth a prompt inspection — signs suggest movement that should be checked before it worsens.
Prompt inspection recommended — get a foundation specialist to confirm scope.
Assessment
Primary finding
Stepped cracking through mortar joints above a window, consistent with localised foundation movement on a ring foundation.
Likely cause
Seasonal ground movement on clay soils, possibly worsened by poor drainage near the affected corner. Common in older NZ homes.
Repair direction
Most likely: Localised underpinning of the affected corner, plus drainage improvement. Final method depends on a site inspection.
What to do next
Have a foundation specialist inspect the corner and check drainage. Monitor the crack width in the meantime and note any rapid change.
Indicative cost range
$12,000 – $30,000. Indicative range only. Final cost depends on site inspection, access, soil/drainage conditions, and confirmed repair scope.
Similar past jobs (examples)
Stepped cracking on a ring foundation, single corner
Typical repair used: Localised underpinning + drainage
Why this is similar: Same structural system and crack pattern.
Check next: Monitor crack width over a few weeks; note any rapid change.
Diagonal cracking above a window, brick veneer
Typical repair used: Crack stitching + repointing, with monitoring
Why this is similar: Similar crack location and masonry behaviour.
Check next: Check the lintel and for any moisture above the opening.
Movement at a rear addition / original-house junction
Typical repair used: Localised underpinning at the junction
Why this is similar: Similar movement where two foundation systems meet.
Check next: Check the join between the new and original foundation.
This is preliminary guidance only. Not a substitute for professional structural engineering advice. Always consult a qualified professional for foundation concerns.
Numbers and details above are illustrative only.