Leaking Basement — Exterior Excavation & Waterproofing in Greenwich, CT
Recurring basement leak at a Greenwich property. We fixed it the right way — from outside. Excavated down to the foundation, removed an enormous amount of stones from the original backfill, sealed the wall with a full waterproofing membrane, and rebuilt the area properly so the basement has stayed dry since.
Before and after: Leaking Basement — Exterior Excavation & Waterproofing in Greenwich, CT
Greenwich homes deserve crack repair that is as precise as the rest of the property, not a quick patch that leaves the pressure in place. See our full foundation crack repair coverage in Greenwich →
The problem
Homeowner had been chasing a chronic basement leak that surface patches and interior fixes couldn't stop. Every interior repair held for a season and then failed again. Inspection showed the real source: water was tracking down the exterior foundation wall through dirty backfill loaded with stones, finding every microcrack on its way down. Any interior treatment would only ever be moving the symptom around — the actual fix had to happen on the outside.
How we fixed it
We hand-excavated a full trench down the exterior of the affected basement wall, all the way to the footer. The original backfill was packed with construction-era stones that had to come out by the bucketload before we could even see the wall (see the photo of the pile we removed). With the wall exposed, we cleaned and prepped the concrete, repaired any visible cracks at full depth, and applied a continuous black rubberized waterproofing membrane across the entire exterior face. Drainage was corrected at the base, the trench was backfilled with clean material, and the wood bracing/forms were installed during dig to keep the trench safe to work in. The basement has stayed dry since — exterior fixes do that, when they're done properly.
- Exterior rubberized asphalt waterproofing membrane
- Polyurethane crack injection (where exposed cracks were found)
- Clean backfill (replaced original stone-loaded material)
- Hydraulic cement at any active seepage points
- Foundation drainage correction at base of wall
If you're seeing similar signs in your home, we can inspect it free, explain what's driving it, and give you a written quote before any work begins.
See a crack? Don't wait for it to cost more.
Free on-site inspection within 48 hours. Honest diagnosis, transparent pricing, lifetime warranty, and financing available.