In South Shields properties, hidden leaks often trace back to pipe joints opened by ground shift in sandy coastal soil near the seafront and marsden bay or fractured supply pipework caused by historic mining subsidence in boldon colliery and jarrow. Watch for a higher water bill, damp or warm patches on the floor, a hissing sound near pipework, or lower water pressure. Properties such as Victorian terraces, inter-war semis, coastal properties, and converted holiday flats are worth checking often, since a leak can run for weeks before it shows.