Smart Buildings Shared-family mapped

WallWater

WallWater: In-Wall Moisture & Leak Radar

Finds water leaking inside walls and ceilings weeks before stains appear.

Open demo room Design this solution See how it works

Readiness Shared-family mapped

Mapped to a shared offline runtime family and usable with a recording or compatible ESP32 CSI stream.

Evidence Unvalidated concept

An early research proposal with no capability-specific product validation yet.

Runtime family Through-wall presence

Coarse presence inference across an obstructed link; it is not identity or photographic imaging.

When no ESP32 is connected

No compatible ESP32 stream is connected. Use the bundled Buildings recording; it demonstrates the shared Through-wall presence runtime, not independent proof of this capability.

Intended capability

Pilot this intended outcome through the shared Through-wall presence family, then validate it against site-specific ground truth: Detects moisture ingress inside walls, ceiling plenums and under raised floors days-to-weeks before visible staining or mold, mapped to a location on the floorplan.

This describes the intended outcome. Readiness is shared-family mapped, evidence is class C, and a catalog mapping or recording is not proof of this outcome at a real site.

Solution blueprint

See the environment before installing it.

This exact kit is one of 191 first-class designs. It includes geometry, objects, nodes, wording, scenarios, installation, limitations, and catalog-bound readiness.

Shared-family mapped

No rendered revision is available yet.

Bundled recording

A related Buildings scene

This is one recorded vertical scenario. It is not separate validation of every capability in the catalog.

01 The physics

Water's permittivity (eps_r~80) vs drywall (~2) is a 40x dielectric contrast: a wet patch slows and attenuates every multipath component crossing it, producing a persistent, spatially-consistent delay increase (fractions of ns) and amplitude drop on specific CIR taps — a static signature no motion sensor can see.

02 Shared processing path

CIR sparse recovery (super-resolved per-path delays) -> RFF/NeRF eps_r field reconstruction to localize the anomalous voxel -> compartment Kalman + CUSUM on per-path delay over days to separate slow ingress from HVAC-driven humidity cycling.

This is a capability design path. Components may be shared with other catalog entries; it is not presented as a unique algorithm.

03 Validation plan

Own-hardware: controlled wet-sponge / drip-tray inserted in a stud-wall cavity between ESP32 links, dose-response of CIR tap delay vs gravimetric water content; ESP32-wall dataset as the dry-wall propagation baseline.

04 Commercial hypothesis

For the facilities director / property insurer: 'Your WiFi becomes a building-wide leak detector — catch the $50k mold claim while it's still a $500 plumbing fix.'