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🏗️ '''Ground heave''' is the upward movement of soil beneath or around a structure, typically caused by the expansion of clay-rich soils as they absorb moisture. In the context of [[Definition:Property insurance | property insurance]] and [[Definition:Buildings insurance | buildings insurance]], ground heave is one of the principal [[Definition:Subsidence | subsidence]]-related perils that can cause significant structural damage to residential and commercial properties — cracking foundations, distorting walls, and displacing floor slabs. It is closely related to, but distinct from, [[Definition:Subsidence | subsidence]] (downward movement) and [[Definition:Landslip coverage | landslip]] (lateral movement of a slope), and insurance policies in many markets treat these as a grouped peril category, sometimes with shared [[Definition:Deductible | deductibles]] or exclusions.

⚙️ The mechanism behind ground heave generally involves changes in the moisture content of expansive clay soils. When a large tree is removed or when sustained rainfall saturates previously dry ground, the soil swells upward with considerable force. In the UK — where shrinkable clay soils underlie large portions of southern and eastern England — heave is a material driver of [[Definition:Claim | claims]] costs for household insurers, and the risk is managed through [[Definition:Underwriting | underwriting]] guidelines that consider soil type, proximity to trees, foundation depth, and local drainage conditions. [[Definition:Loss adjuster (loss adjuster/claims adjuster) | Loss adjusters]] investigating heave claims typically commission geotechnical surveys and structural engineering assessments to confirm the cause and extent of damage before the insurer authorizes repairs. Repair costs can be substantial, often involving underpinning foundations, removing problematic vegetation, or installing root barriers — all of which contribute to long cycle times and elevated [[Definition:Claims handling | claims handling]] expenses.

🌱 From a market perspective, ground heave represents a slow-onset, often insidious peril that challenges traditional [[Definition:Loss reserving | reserving]] practices because damage develops gradually and claims can take years to settle fully. [[Definition:Climate change | Climate change]] is expected to exacerbate the risk in many regions: more frequent alternation between drought and heavy rainfall intensifies the shrink-swell cycle in clay soils, a trend already observable in UK claims data and increasingly relevant in parts of continental Europe, Australia, and the southern United States. Insurers are investing in geospatial analytics and [[Definition:Remote sensing | remote sensing]] technologies — including satellite-based ground movement monitoring — to improve risk selection and detect early signs of heave before damage becomes severe. For [[Definition:Reinsurer | reinsurers]] and [[Definition:Catastrophe model | catastrophe modelers]], the challenge lies in the fact that heave losses, while individually modest compared to earthquake or flood events, can aggregate across large portfolios of residential risk in affected regions, making accurate exposure management essential.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Subsidence]]
* [[Definition:Landslip coverage]]
* [[Definition:Earth movement coverage]]
* [[Definition:Buildings insurance]]
* [[Definition:Climate change]]
* [[Definition:Loss adjuster (loss adjuster/claims adjuster)]]
{{Div col end}}

Definition:Ground heave - Revision history

PlumBot: Bot: Creating new article from JSON