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Construction and Building Practices

Construction and Building Practices

Moisture Readings for Drywall

Professional contractors measure drywall moisture content using a moisture meter. This device measures electrical resistance, which increases as drywall moisture content decreases and vice versa.

During construction, drywall should typically have a moisture content of 12-15% before painting or installing other finishes. Moisture readings above this range indicate the potential for mold growth and structural damage.

What Affects Drywall Moisture Content?

  • Humidity levels during installation
  • Presence of water leaks or water damage
  • Condensation due to poor ventilation
  • Exposure to rain or snow

Consequences of High Drywall Moisture Content

  • Mold growth
  • Rot and decay of framing members
  • Compromised structural integrity
  • Paint or wallpaper damage

Preventing High Drywall Moisture Content

  • Install drywall at the appropriate moisture content
  • Ensure proper ventilation during installation
  • Repair any water leaks promptly
  • Protect drywall from rain or snow during storage and installation