Why does a ceiling stain keep growing after the leak stopped?
Water held in the paper and the insulation above the ceiling keeps moving after the source is closed, and it can reach the stain several days later. A stain that is still growing means the water is still moving through the material.
Once the source is stopped, the water above the ceiling continues to spread through the insulation and along the framing until it finds a gap. The stain shows where it is reaching, not where it started. The crew reads the ceiling and the cavity above it to see where the moisture is still moving.
A ceiling stain that stops growing and dries to a light mark is not always a sign of finished damage. The readings decide whether the paper, the gypsum and the framing are dry. A stain that comes back after drying usually points to a source that has not yet been found.
Can wet drywall be dried in place?
Drywall that is soft, sagging or has lost its paper facing usually cannot be dried in place, because the gypsum does not recover its strength. Drywall that is only damp at the surface can sometimes be dried, and the crew decides from the readings.
Gypsum that has been saturated loses its rigidity and can crumble when pressed. Paper that has delaminated does not bond back to the core. Removing those sections is the faster and more reliable route, and it lets the cavity dry.
Where the readings show the board is damp but still firm, the crew can keep it and dry it with air movement. The decision is recorded, and the owner is told which sections were kept and why.
Should I cut out the drywall myself?
It is safer to let the crew make the cuts, because a cut made without reading the moisture can open the wrong section or hit wiring or plumbing. If you must make an opening, keep it small and photograph it first.
Cutting into a wall without knowing where the wiring, plumbing and ducts run can cause a shock, a leak or a second loss. The crew reads the wall before any cut and checks the locations that are at risk. It also knows how far the moisture reaches, which a homeowner often does not.
If the water is still coming in or the ceiling is sagging, do not cut. Support the area as best you can from a safe spot, clear the room below, and call the line.
What do the patch and paint look like after drying?
After the cavity dries, the cut sections are closed with new drywall, taped, finished and painted. The patch can be seen in the paint for a time, and the crew explains what the finished surface will look like before it starts.
A new section of drywall is taped and mudded to match the surrounding wall, and the paint is matched as closely as the existing finish allows. Texture and the edge of the old paint can show, and that is part of the repair. The owner is told what to expect.
A ceiling repair can need several coats before it blends. The painter should check the light at the end of the job, because the look under bright light is different from the look in the morning. The crew does not promise a perfect match.