Screwed in and measured by torque, each pier finds its own depth on ground that varies across a lot.
Ground conditions change quickly across a Perry lot. Sandy clay in the low areas that holds water and loses bearing, firmer material on the higher ground, and the depth at which you find something reliable varies from one corner of a house to another.
That is the situation helical piers handle well. Each one advances until the torque reading says it has reached capacity, so depth is determined at each location individually.
The method also suits the older homes around the square. They are lighter structures on pier and beam foundations, and a driven pier needs substantial weight to react against. A helical pier needs none, which makes it the workable option on a light historic house.
Every Perry home gets the same helical pier installation scope, and the written price says exactly what that covers.

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