Connecticut & New England
Stone Foundation Restoration
Our specialty. A historic stone foundation outlasts any concrete one, but only if it's restored the right way. We restore the interior with breathable lime mortar and rebuild the exterior moisture barrier by hand to stop saturation, bowing, and structural decay.
Stone foundation restoration is what we do best. A properly built stone foundation will outlast any concrete one, but over the years the earth starts to reclaim it, saturating the stone with wet soil until moisture works through the wall. The common "fix" (parging or stuccoing the inside with Portland cement) is the worst thing you can do: it traps all that moisture, the stones start to break apart, the wall begins to bow, and the wood framing above absorbs the moisture and develops mold and serious structural problems.
Doing it right means treating the inside and the outside. Inside, everything is cleaned back to bare stone and restored with a breathable lime mortar so the wall can manage water the way it was designed to. Outside, the loose boulders stacked against the foundation have to be dug by hand, never with an excavator, which will rip the side right out of your wall, then cleaned, fitted with a vapor-permeable moisture barrier, and backfilled and compacted. We've saved multiple historic building envelopes this way. It is not a job for guesswork, and the wrong repair can cost you the house.
- ✓Interior restored with breathable lime mortar
- ✓Exterior hand-dug, never machine-excavated
- ✓Vapor-permeable moisture barrier and compacted backfill
- ✓Full debris and moisture extraction before bonding
- ✓Stops saturation, bowing, mold, and structural decay
- ✓Interior work available year-round, including winter
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Stone Foundation Restoration FAQs
Why not just parge or stucco the inside with cement?
Because it traps the moisture instead of managing it. Once a stone wall can't breathe, the saturated stones begin to break apart, the wall can bow, and the framing above takes on moisture and mold. We restore the interior with breathable lime mortar so the wall handles water the way it was built to.
Why does the exterior have to be hand-dug instead of using an excavator?
The outside of an old stone foundation is a wall of loosely stacked boulders. An excavator catches those stones and pulls the side of your foundation out with the soil. It has to be hand-dug, cleaned to bare stone, fitted with a moisture barrier, and compacted back. People have tried the machine shortcut and called us back to fix far worse damage.
Can this work be done in the winter?
The interior restoration can be done year-round, which is why we schedule a lot of inside work through the winter. The exterior excavation and moisture barrier are warm-season work, so a full restoration is usually planned across the seasons.