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Waterproofing a poured-wall basement in Troy
Updated October 19, 2026 · referral service, not a contractor
Most Troy basements are poured concrete from the 1970s on. They don't leak the way block does; they leak at specific points: cracks, form tie holes, the cove joint at the floor, pipe penetrations and egress or window wells. The fix is matched to the entry point, and the cheapest effective one is usually the right one.
Start by finding the entry point
- Vertical crack with a water stain fanning down: inject it (see crack repair).
- Small round weeps in a grid pattern: form tie rods; they're sealed individually.
- Water along the floor seam, often after days of rain: hydrostatic pressure under the slab; this is a drain-tile-and-sump problem.
- Water under a window: the well has no working drain, or the grade pitches toward it.
- Finished wall, damp carpet edge: the contractor opens a small inspection hole; don't guess.
Interior drain tile in a poured basement
The floor is cut along the affected wall(s), perforated pipe is laid in stone beside the footing and run to a sump, and a short wall membrane directs seepage down. In poured basements a partial system along the wet walls is common and legitimate, because the water isn't moving through hollow cores to the far side of the house. Full perimeter is recommended when the water table is the cause, which is typical on Troy's Brookston and Colwood soils.
Exterior work
For a wall with a long horizontal crack, a bow, or chronic high-entry leaks, excavation with a membrane, drainage board and new footing drain is the durable fix. Troy's wide side yards make this easier than in older suburbs, and 1970s–90s backfill is usually diggable. Expect to lose landscaping along that wall.
Window wells and egress wells
Egress windows added for basement bedrooms are a top Troy leak source. The well needs a drain to the footing tile (or a dry well), a cover, and grade sloping away. A contractor can retrofit the drain without redoing the window.
At the estimate
Ask for: the entry points identified, linear feet of tile if any, sump and backup model, how finished walls will be opened and restored, warranty terms, and who pulls the City of Troy plumbing permit. Troy's Building Department is paperless; permits go through BS&A Online.
Free estimate from a Troy pro
One independent contractor who works in Troy gets your request, calls you, and gives a free written estimate. No charge for the introduction, no obligation afterward.
Sources
- USDA NRCS Soil Data Access, map unit components at Long Lake/Coolidge (Northfield Hills), Rochester/Square Lake (Sylvan Glen), Wattles/John R (Emerald Lakes) and Big Beaver/Rochester, queried Oct 19 2026 — https://sdmdataaccess.sc.egov.usda.gov/
- City of Troy, Building Department (500 W. Big Beaver Rd; paperless permits via BS&A Online; inspection line 248-689-5744) — https://troymi.gov/departments/building_inspections/index.php
- HomeGuide, basement waterproofing cost (national averages) — https://homeguide.com/costs/basement-waterproofing-cost