How do you know a wall or floor is dry?
A material is dry when its moisture reading matches the reading in unaffected material of the same kind nearby. Looking dry or feeling dry is not enough, because wood and drywall can feel dry on the surface while holding water inside.
The technician compares readings across the room with readings from a dry area, such as the same wall higher up or a neighboring room. A reading that stays well above the dry reference means that material is still wet, however it looks.
The numbers are written down at each visit. You will see them in the report at the end of the job, and you can ask the crew to show you the readings at any point.
Why does drying take several days?
Water inside wood, drywall and insulation leaves slowly, and the air has to be moved and dried for long enough to pull it out. Drying in a building takes the time the materials need, not the time the equipment is on site.
Moisture moves out of dense materials more slowly than out of the surface. A subfloor or a stud can keep its water long after the room feels dry, which is why the readings, not the calendar, end the job.
The crew may make several visits. Each one is short and focused on the readings and the equipment, so you know what has changed since the last visit.
Can I run my own fans and dehumidifier?
A household fan can help move air over a damp surface, but it is not a substitute for drying equipment, and running it wrong can spread moisture into rooms that were dry. Leave the setup to the crew and keep doors and vents as the crew asks.
Household dehumidifiers are not sized to pull the moisture out of a wall cavity or a subfloor. A small unit can run for days without making a measurable difference, and it can give a false sense that the job is under control.
If you want to help, keep the wet room's doors open where the crew asks, clear the floor space around the equipment, and keep pets and children out of the work area. Ask the crew before you move any equipment.
What can drying not save?
Materials that have lost their strength, swelled beyond repair, or hold water in a way that cannot be reached are usually removed. Drying also cannot undo damage from long delay, and it does not fix the leak that started the job.
Particleboard, some flooring underlayments and paper-faced materials often swell and break down when they stay wet. Solid wood usually survives better, but it can still warp or stain. The crew tells you which materials are at risk, and it asks before removing anything that could be saved.
Drying is not a repair. If the pipe, fixture or appliance is still leaking, the readings will keep rising, and the crew will tell you so before it sets up the equipment.
What affects the cost of drying?
The area affected, the number of materials that must be opened, how many days the equipment runs, the access to cavities and floors, and the category of the water. The crew sets out its price on site and waits for your approval before it begins.
Every extra opening takes time, and every extra day of equipment adds to the job. A drying plan that covers one room is very different from one that reaches a second floor or a shop with a wide open floor plan, so the crew sizes the plan to what it actually finds.
The crew will not promise a number before it has measured the job. What it will do is explain each step and why it is needed, so you can see what is being charged for.