Gravity and vertical penetrations
Water commonly moves downward through framing gaps, pipe penetrations, light fixtures, chases, stair openings, and ceiling assemblies.
Water Migration
Visible staining is often only one part of the migration path.
Water can follow gravity, porous materials, seams, underlayments, chases, penetrations, cavities, plenums, cabinets, and adjacent assemblies.
Capillary movement
Porous materials can draw water beyond the visibly wet edge.
Surface tension and seams
Water can follow flooring seams, wall bases, trim interfaces, and underside surfaces.
Wall cavities
Water can enter through base plates, electrical openings, plumbing penetrations, and damaged finishes.
Insulated cavities
Insulation can retain water and reduce airflow, making surface appearance unreliable.
Cabinet and millwork bases
Toe kicks and wall attachments can conceal retained water and wet finishes.
Flooring underlayment
Floating floors, pads, membranes, and underlayments can trap water beneath a dry-looking surface.
Raised floors and plenums
Commercial systems can distribute water across concealed horizontal spaces.
HVAC pathways
Ducts, air handlers, returns, condensate systems, and penetrations can affect migration and airflow.
Exterior envelope
Roof, flashing, wall, window, door, and drainage failures may continue introducing water until source control is complete.
Concrete and masonry interfaces
Joints, cracks, penetrations, and adjacent porous materials can create hidden distribution paths.
Multi-unit construction
Shared walls, chases, shafts, corridors, and units below may be affected even when the source unit appears limited.