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Indicators of Moisture Issues in New Construction vs Existing Buildings

New Construction

Moisture issues in new construction can be identified by:

  • Visible mold or mildew
  • Musty odors
  • Warping or buckling of walls, floors, or ceilings
  • Rust or corrosion on metal surfaces
  • Efflorescence (white or crystalline deposits on surfaces)
  • Condensation on windows or walls
  • Excessive humidity levels

Existing Buildings

In existing buildings, indicators of moisture issues include:

  • Peeling or bubbling paint
  • Cracking or crumbling plaster
  • Water stains on ceilings or walls
  • Soft or spongy flooring
  • Rotted wood
  • Insect or pest infestations

What Should Moisture Readings Be for Internal Walls?

For internal walls, optimal moisture levels should typically be below 16%.