Wall Water Damage Repair in Residential Buildings
Wall water damage is often less visible than a wet floor and more important. Water enters at a window, a supply line, a roof leak, or a wet floor that wicked into the base plate. The paint can look almost fine while the cavity is wet. This page is residential. Independent contractors do the assessment and the openings. We refer them.
The wall is a cavity, not a painted surface
A useful repair treats studs, plates, insulation, and the back of the drywall as the job, not only the face.
Moisture meters and, when useful, a thermal camera find wet bays. Insulation in a wet bay is usually removed. A small opening at the base can let a cavity dry; a larger opening is needed when the board is ruined or when dirty water was involved. The moisture map should justify the opening. See drywall repair after water damage for the cut-or-dry decision, and moisture mapping water damage for the measurement method.
Windows, hose bibbs, and showers are common entry points. A wall that is wet at every storm may be an envelope issue, not only a one-time spill. A wall that is wet after a pipe burst is a one-time loss if the pipe is fixed. Those are different repairs.
Close the wall only when it is documented dry
New paint on a wet cavity is a delay, not a finish.
After dirty water, cleaning of remaining framing is part of the scope. Rebuild, including drywall and trim, comes after a dry standard. Educational costs sit on the cost and drywall-cost pages. For process order, see the restoration process guide.
Frequently Asked Questions
Answers about wall water damage, when to open a cavity, and when the wall can be closed again.
Sometimes, for a light, clean, recent wetting, with air at the base and good readings. Often a limited opening is required to remove insulation and to dry the plate.
The face can dry first. The cavity and the base plate can stay wet. Meters, not hands, should decide.
If mold is present in the cavity, the opening and removal must follow mold-safe practices. The two issues often meet. See our mold pages. The first job is still to stop water and to dry.
The envelope repair is often a different trade from interior drying. Both have to happen. Ask who is responsible for each.