Cape Cod sits on sand. That single fact explains almost every hardscape failure on the peninsula. A patio that settled unevenly, a retaining wall that leans out, a brick path that has gone wavy, stone steps that shifted over a winter. In every one of those cases the stone did exactly what it was supposed to do. The base did not.
Water is the other half of it. A retaining wall with no drainage behind it is holding back saturated soil, and saturated soil is heavy. Walls built without drainage fail, and they fail from behind, where nobody is looking. Then there is the part specific to the Cape. Most properties here have a septic field, and redirecting water away from a foundation on one side of a house often means sending it toward the leach field on the other. A saturated leach field is a failing leach field.
Compass Home Group builds masonry and hardscaping for year round residents in Hyannis and Barnstable, and for second home owners in Falmouth, Mashpee, Yarmouth and Dennis. Our general contractor services cover the structure when the wall turns out to be holding up more than dirt.