Risk of Footing Undermining or Surcharging
Risk of Footing Undermining or Surcharging is a high-severity soil & foundation defect SURE inspectors have documented across 1 inspection report.
Causes
- Proximity of proposed dwelling or structures to existing footings
- Construction of new retaining walls near existing foundations
- Proposed changes in finished ground levels
Symptoms to look for
- Warning about potential impacts from proposed levels and retaining walls on existing footings
- Instruction to 'MAINTAIN FOOTING UNDERMINING AVOID SURCHARGING'
Remedies
- Design and implement measures to protect existing footings from undermining or surcharging
- Ensure new construction does not compromise the stability of existing foundations
- Conduct a detailed geotechnical and structural engineering assessment
Get an inspector through this property.
Findings in this category skew high severity. If you are under contract, we can usually book inside the cooling-off window. Every inspection includes 12 months of free advice.
Curated entries in Soil & foundation
- Curated 1–4/5Trees in Close Proximity to Dwelling
Large trees within the foraging radius of the dwelling - typically any tree within 3 m for small species, or within 10 m for large eucalypts - introduce two distinct risks: root-driven soil moisture fluctuation that causes differential footing movement on reactive clay, and a direct termite foraging corridor between a timber food source in the crown or root system and the building structure. Neither defect is always present, but the proximity constitutes a conducive condition that warrants ongoing monitoring.
- Curated 2–5/5Reactive Clay Soil Movement Affecting Foundation
Seasonal expansion and contraction of reactive clay soils causing cyclical foundation movement, wall cracking, and floor level changes. Prevalent in Sydney Western Suburbs and some Perth clay zones. Severity depends on soil class (H, H1, H2, E) and footing design adequacy.