When does a ceiling need to be cut open?
A ceiling is opened where water is visible, where it sags or where readings show it is holding moisture. Dry stains with dry readings are often left closed. The decision is made from readings and the condition of the material.
Cutting a ceiling costs drywall, paint and time, so it is done only where the water needs to drain and the insulation needs to come out. A small opening at the lowest wet point is usually enough to let the cavity drain and let the crew see the framing.
A ceiling that has been wet for a long time may have soaked joists or a wet sheathing layer above. Those are checked through the opening and dried before the ceiling is closed.
Can wet drywall be dried and kept?
Sometimes. Drywall that is only lightly wet and dries to readings can be kept. Drywall that has swollen, softened or started to crumble is removed. Paper facing that has come away from the gypsum cannot be restored and is replaced.
The test is the reading and the material. Drywall that is firm and reads dry after drying is kept. Drywall that has lost its shape or has mold growth on its paper is cut out and replaced.
The crew marks the boundary of the removed area on the wall or ceiling so the patch can be made to a clean line, and it records which areas were kept and why.
What moves the cost of a ceiling and drywall job?
The size of the wet area, how much insulation must be replaced, how high the ceiling is, and whether there is texture or a finish that must be matched all decide the job. The price is explained and approved before work starts.
A small ceiling section with one joist bay is a shorter job than a long run that spans several rooms. Insulation that must come out and be replaced adds to the work. High ceilings need taller access, and a textured finish takes more care to patch.
The patching and painting after the drying is a separate trade job, and the scope will say whether it is included. The crew explains what it removes and dries, and what is left for the finish trade.
Why is the insulation replaced rather than dried?
Insulation is soft and porous, and once it has taken on water it holds moisture against the framing and the ceiling for a long time. Drying it in place is usually not effective, so it is removed and replaced with new material.
Wet insulation compresses as it dries, and it loses its ability to insulate. Its moisture also keeps the joists and sheathing wet. Removing it lets the framing dry fully.
New insulation goes in once the framing is dry and checked. The technician records what was removed and what was installed, so the work is clear in your records.
What should be done to a ceiling fixture that got wet?
Turn off the power to the fixture at the breaker before anything else, and do not touch a wet fixture. A fixture that has been in water is replaced by an electrician, and the cavity around it is dried before the new fixture goes in.
Water in a fixture or a fan housing can damage the wiring and create a shock risk. Leave the fixture alone until the power is safely off and an electrician has checked it.
The water crew dries the cavity and joists around the fixture, and it records where the water was. That helps the electrician see what was wet before the new fixture is installed.