If you live in New Hampshire, you already know the rhythm: a warm afternoon melts the snow, a clear night drops the temperature below freezing, and the ground does it all over again the next day. That freeze-thaw cycle is hard on driveways and walkways, but it is especially hard on the foundation under your home.
Frost heave is the big one. When moisture in the soil freezes, it expands, and that expansion can lift or shift the ground against a foundation wall. Over many seasons, even a small amount of movement can open cracks, loosen mortar in older stone walls, and create the kind of gap that lets water in come spring.
Spring runoff is the other half of the problem. When the snow melts fast and the ground is still frozen, the water has nowhere to go. It pools against the foundation, finds any crack or gap, and ends up in the basement. This is why so many Southern NH homeowners see water appear in the basement in March and April, even if the rest of the year is bone dry.
During an inspection, I look for the signs this cycle leaves behind: horizontal or stair-step cracks in concrete, bowing or inward movement on block walls, loose or missing mortar in stone foundations, efflorescence (that white powdery mineral deposit), and any staining on the walls or floor that points to past water. I also check the grading, gutters, and downspouts, because how water is directed away from the house matters as much as the wall itself.
Not every crack is a deal-breaker. Many are normal for an older New England home and simply come with the territory. The goal is to tell you which ones are typical, which ones deserve a closer look by a specialist, and which ones you might want to address before they turn into a bigger, more expensive problem. That honest, balanced picture is what a good inspection is really for.
Have questions about your home?
Mike Robicheau inspects every home himself and is happy to walk you through what he finds. Schedule your inspection or reach out with questions any time.
