Is heave as bad as subsidence?

Is heave as bad as subsidence, yes heave can be just as bad as subsidence for building damage, sometimes worse because it is upward movement that is harder to predict and fix. Subsidence is downward sinking of ground due to clay shrinkage, groundwater extraction or mining, causing foundations to drop and walls to crack with diagonal cracks wider at top. Heave is upward swelling of ground due to clay expansion when wet after tree removal, after long drought followed by rain, or frost heave, causing floors to lift, walls to crack with cracks wider at bottom, and doors to jam. Both cause similar structural damage costing $20K to $100K to repair with underpinning or ground improvement. Heave can be as bad because it can occur rapidly after tree removal, with clay absorbing water and expanding 50mm to 150mm, lifting foundations unevenly, and is often excluded from home insurance unless sudden, like subsidence. In UK and Australia on clay soils, heave claims are common after trees cut down, with damage to extensions and conservatories. For insurance, both subsidence and heave are often excluded or have high excess $1,000, and require geotechnical investigation. Heave may be worse because it can continue for years as clay swells, and fixing requires removing clay or installing root barriers. So heave is as bad as subsidence for damage, cost and insurance implications, both serious ground movement issues needing specialist repair.