Most Sidcup 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.
Inter-war suburban housing on London clay. Bay windows and rear extensions are the usual trouble spots. 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 DA14, DA15 property tells you which one you actually need.
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