Risk library
Drought and soil movement
Understand clay shrink-swell and protect the building.
On clay soils, drought and rehydration can move the ground and stress foundations. The key is to monitor early signs, manage water around the home and get the right diagnosis before heavy repairs.
Do not simply fill a moving crack without understanding the cause. If cracks evolve, document them and contact an insurer, building expert or geotechnical professional.
Structural signals
Track changes over time.
The risk is often progressive. Dated photos, measurements and context help distinguish cosmetic cracks from structural movement.
Stair-step cracks on load-bearing masonry can indicate differential foundation movement.
Cracks around doors and windows should be dated and monitored.
Doors or windows that jam after a dry summer can indicate distortion.
Offsets between wall sections should be treated as a warning sign.
Reflexes
Stabilize information before action.
A good response starts with exposure checks, documentation and controlled water management around the building.
Check public exposure maps before buying, building or doing major work.
Photograph cracks with a ruler and date each observation.
Look for water leaks, drainage issues and sudden local rehydration.
Use geotechnical or structural diagnostics in medium or high exposure zones.
Adaptation
Limit fast moisture variations near foundations.
Preventive actions focus on steady moisture, controlled drainage, vegetation distance and expert-led structural work when needed.
Manage roof water, drains and underground networks.
Avoid high-water-demand trees too close to facades.
Use surface protection around the building when appropriate.
Consider underpinning or resin injections only after expert diagnosis.
Household checklist
Check clay shrink-swell exposure at the address.
Photograph, date and measure cracks before intervening.
Inspect gutters, inspection chambers, buried pipes and wet zones near walls.
Avoid large-root trees too close to the building.
Contact the insurer or a specialist if cracks evolve.