Why must standing water be removed before the demolition starts?
Demolition disturbs the water and spreads it into dry areas, and it can release contaminants into the air. Removing the standing water first keeps the damage where it is and lets the crew see the real floor level. The extraction is the step that protects the rest of the building.
A wall or a floor opened while water is still standing will let the water run into the cavity and out into rooms that were dry. The crew therefore pumps and vacuums first, then decides what to open based on the readings.
The floor level also matters. Water can hide low spots and steps, and a crew that works before the water is removed may not see a trip hazard or a damaged section of floor. Extraction gives the crew a clear view of the space.
How does a crew deal with power and electrical hazards in a flood?
The crew checks the power to any wet area before entering, and it treats any wet outlet, panel or appliance as a live hazard until it is confirmed safe. It does not restore power to a wet area on its own judgment. The homeowner is told which circuits are off and which are still live.
Water and electricity are the greatest risk in an extraction. The crew keeps its pumps and cords away from wet areas, and it uses equipment rated for the job. Cords are kept off the wet floor and out of standing water.
A qualified person must confirm the power before any wet area is restored. The homeowner should not try to switch power back on in a flooded room, even if the breaker seems to be off.
What happens to the water after it is pumped out?
The water is discharged from the building to a place where it can be released safely, and the route is chosen by the crew. Water from a flood or a sewage backup is handled according to its type. The crew explains where the water is going before it is pumped.
Water pumped from a house can carry soil and debris, and it must not be released where it will flow back into the building or onto a neighbor's property. The crew chooses the discharge point with that in mind.
Where the water is contaminated, the crew uses the steps for that category, and it explains them before work begins. The homeowner can ask which steps are being taken at any time.