Most Croydon homeowners get in touch after spotting one of a few familiar things. Stepped cracks running through the brickwork. A front door that has stopped closing properly. A floor that tilts towards the bay window. A hairline gap opening up where a rear extension meets the original house. None of those are cosmetic. They are the early signs of ground movement under the footings.
Mixed Victorian terraces and 1960s blocks. Shallow footings and old drainage are frequent contributors to movement. Add in mature street trees pulling moisture out of the subsoil through a long dry summer, the odd leaking Victorian drain quietly washing fines out from under a footing, and the fact a neighbour's extension or a new patio can change how water drains across the plot, and you have the usual cocktail behind the cracks in your wall.
Where the ground suits it, resin injection re-levels the footing in 24 to 48 hours with no excavation and no need to move out. Where movement is serious or the soil rules resin out, traditional mass-concrete underpinning is the long-life answer. And often the real fix is upstream: a drain repair or a root barrier that stops the cause without lifting a single brick. A specialist survey on your CR0, CR2 property tells you which one you actually need.
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