Basement Waterproofing in Mount Kisco, NY
Kisco River valley homes and hillside ledge properties give Mount Kisco two distinct basement-water problems — we've waterproofed both.

Why Mount Kisco basements need waterproofing
Mount Kisco straddles the Kisco River valley and the hills around it, which splits the town's water problems in two. Valley-floor homes near the river and downtown sit over a high water table and clay soils that hold water against foundations; hillside properties get hydrostatic pressure and surface runoff coming off the ledge above them. The village's older housing stock adds stone and early-concrete foundations that seep through joints and cracks.
We've done structural masonry waterproofing in Mount Kisco (see our project gallery), so we know the local foundations firsthand. Our approach is source-first: moisture mapping to distinguish valley groundwater from hillside runoff, then interior drainage and sumps for the valley homes, exterior grading and membrane for the hillside runoff cases, and crack injection plus vapor control for the older masonry basements throughout town.
How we waterproof Mount Kisco basements
We tailor the system to the source of the water. See the full detail on our basement waterproofing hub.
Interior Drain Tile + Sump
Perimeter French drain to a battery-backup sump — the standard fix when exterior excavation isn't practical.
Stego Vapor Barriers (ASTM E1643)
Below-slab barrier that stops vapor migrating up through soil — the top source of chronic basement humidity.
Foundation Crack Injection
Polyurethane or epoxy full-depth seal for leaking foundation cracks under hydrostatic pressure.
Exterior Excavation + Membrane
Dig out the wall, apply waterproof membrane, drain to daylight — the durable fix for chronic exterior intrusion.
EZ Breathe Ventilation
Whole-basement moisture, mold-spore, radon and VOC removal — the preventive final step after a dry-out.
Grading + Downspout Correction
Often the cheapest, highest-impact fix: slope soil away from the foundation and move roof water off the walls.
Real waterproofing work near Mount Kisco
Selected photos from waterproofing assessments and projects across Fairfield + Westchester. The pattern is consistent: find the source, install the right system, verify with moisture mapping.




Mount Kisco basement waterproofing — FAQ
Will homeowners insurance cover basement waterproofing?+
Preventive waterproofing is almost never covered — policies pay for sudden, accidental water events, not moisture prevention. If waterproofing is needed to restore damage from a covered event (a burst pipe, for example), it can be folded into that claim scope. We tell you honestly during the free assessment whether any part is claimable.
How do you decide between interior and exterior waterproofing?+
It depends on the source, which we identify first with thermal imaging and moisture mapping. Hydrostatic pressure from outside the foundation usually calls for exterior grading, drainage or membrane; vapor and seepage through walls or slab is handled with interior systems (drain tile, Stego, EZ Breathe). Often a combined approach is best — but we never prescribe before we've found the actual water source.
How is 911 Storm different from a typical waterproofing contractor?+
We're an IICRC-certified restoration company first, waterproofers second — so we approach basement moisture as a building-science problem and use thermal imaging + moisture mapping to find the real source, not just sell a system. If your problem is actually from above (roof, plumbing), we'll tell you. If it's groundwater, we install the right system with the right manufacturer warranty.
Do you have real waterproofing experience in Mount Kisco specifically?+
Yes — we've completed structural masonry repair and waterproofing on Mount Kisco basement walls, and those photos are in our project gallery. That hands-on experience with the local valley-clay and hillside-ledge foundations is exactly why we map each property's water source before recommending a system rather than selling a one-size-fits-all package.
Basement waterproofing in nearby towns
Free basement waterproofing assessment in Mount Kisco
60-minute response, no obligation, no high-pressure sales. We find the water source before we quote a system.
IICRC Certified • Licensed & Insured • All Major Insurance Carriers