Start with conditions, not a product
Storm-damage response around St. Petersburg is shaped by water category, how much time has passed, hidden cavities, electrical safety, and material porosity -- this site does not promise emergency-speed availability.
Build a complete scope
- The origin recorded and photographed before any material is shifted
- Whether tidal or surface water is in play, given how little elevation there is
- Moisture readings through block and behind finishes, beyond the visible edge
- The drying strategy, and why outdoor air cannot do the work here
- Sign-off readings, and exactly which rebuild items are covered
St. Petersburg context
The source question carries unusual weight in a low, flat, tidal city. Standard homeowner policies exclude flood, which is insured separately, so whether water arrived as tidal or surface flooding, as wind-driven rain through a damaged envelope, or from a failed supply line inside the building determines which coverage responds -- and that has to be established and documented before anything is removed. Condominium corridors add a second layer a detached house never has, because responsibility for a loss crossing a shared wall, ceiling or common element is divided between the unit owner and the association, and the boundary needs to be identified early. Drying is then the slow part: persistent humidity means outside air brings moisture rather than removing it, and masonry postwar construction holds water far longer than frame construction, so surfaces that feel dry frequently are not.