So There is Moisture in Your Walls…

Nothing good comes from the presence of moisture inside wall cavities — the number of damaging consequences that can happen to a home is extensive:

  • Toxic mold growth
  • Rotting wood structure
  • Stained swollen drywall
  • Peeling paint or wallpaper
  • Ruined insulation
  • Insect infestation
  • Continuous odors

Moisture inside a wall is typically a result of some fault or failure in the construction or maintenance of the house. It also will never get better on its own. Instead, things will get progressively worse. Here are reasons why and how wetness can seep into areas where it doesn’t belong.

  • Condensation. Gaps and cracks in exterior walls may allow cold outdoor air to seep into the warmer interior wall space. This cold air will naturally form condensation on surfaces inside the wall cavity, creating a perpetually moist environment trapped inside the wall. Careful review is required to locate and seal external cracks and gaps that allow outdoor air to infiltrate exterior walls.
  • Plumbing leaks. Water supply lines routed through wall cavities may have tiny pinholes due to deterioration and/or seepage at joints. These may leak continuously or intermittently, soaking insulation inside walls, saturating wood structure and drywall. Uninsulated copper cold water pipes may also “sweat” condensation in amounts sufficient to cause damage inside walls, particularly if structural cracks and gaps allow humid outdoor air to infiltrate the wall cavity.
  • Penetrating rainwater. Exterior siding resists showers and splashes, not water flowing continuously down the wall. Clogged gutters overflowing during rain frequently cascade water down exterior walls. Water penetrating siding may also infiltrate the wall void, triggering internal moisture damage.

Drying Out

If external signs aren’t obvious, eliminating suspected moisture inside walls requires determining its exact location. Moisture meters that utilize needle probes can identify presence of moisture inside wall cavities without drilling large holes. Once moisture is pinpointed, the wall can be opened for drying, treating mold contamination, repairing any plumbing leaks and removing saturated insulation, if present. Rotted wood can also be replaced.

Using qualified professional services to identify the cause and make the repairs will be safer and more cost-effective in the long run.

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