Wall Water Damage: What Happens Inside the Wall
A wall looks solid, but inside it is a sandwich of materials: drywall, insulation, framing and sometimes pipes and wiring. When water gets inside, it soaks each layer in turn, and the damage can be extensive long before anything shows on the surface.
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This guide explains what happens inside a wet wall, how it is found, and how the repair decision is made.
Water inside walls in general terms
Water enters a wall from a leaking pipe, a roof leak, a window leak or a flood, and once inside it runs down inside the cavity, soaking the drywall from behind and pooling at the bottom. The visible stain, when it finally appears, is often well below where the water entered.
Because the cavity is enclosed, the water has little air to dry it, and it can sit there for weeks. That is why a wall that looks dry on the outside can be wet on the inside.
Drywall, insulation and framing
Drywall absorbs water quickly and loses strength when wet. Insulation, especially fibrous insulation, can hold water and lose its effectiveness, and timber framing can absorb moisture and, over time, deteriorate if it stays wet.
Each material is assessed separately. Drywall that has been soaked may need to be removed, insulation that has been wet may need to be replaced, and framing needs to be dried and checked before anything is closed up again.
Moisture detection
Moisture inside a wall is found with meters that read through the drywall or at the base of the wall, and the readings are taken at several heights to show how far the water rose. The exact methods used are something the operator should confirm.
The readings decide whether the wall can be dried in place or whether sections of drywall need to be opened up. Drying a wall from the outside alone is rarely enough when the cavity is wet. Our page on ceiling and wall water damage repair explains the process in general terms.
Repair vs replacement: operator to confirm
Whether a wall is repaired or partly replaced depends on how wet it is, how long it has been wet, and which materials are affected. A wall that was wet for a short time may dry in place, while one that sat wet for days may need sections removed.
In the Capital Region, wall water damage help in Albany can arrange an inspection, and structural drying and dehumidification explains the drying stage. Do not open up a wall yourself to look for a leak.
Key Takeaways
- Water enters a wall from a leaking pipe, a roof leak, a window leak or a flood, and once inside it runs down inside the cavity, soaking the drywall from behind and pooling at the bottom.
- Drywall absorbs water quickly and loses strength when wet.
- Moisture inside a wall is found with meters that read through the drywall or at the base of the wall, and the readings are taken at several heights to show how far the water rose.
- Whether a wall is repaired or partly replaced depends on how wet it is, how long it has been wet, and which materials are affected.
Ready for the Next Step?
Call to arrange a water damage visit in New York. Describe what you found and we will talk through the next step.
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