Hygrothermics

Determination of dew water on the surface

Measurement Determination of dew water on the surface of exterior finishes caused by nocturnal long-wave radiation
Standard Own testing method
Measurement object Outside coatings like plaster or paint

Technical data

Sample size (H × W) 50 × 50 mm
Indoor climate +20 °C, 65 % r.h.
Dew-point temperature undercut Typically 1.5 K

Special features

  • Determination of dew water on the surface by dabbing and weighing
  • Dew-point temperature corresponding to the situation of outer walls in clear nights

 

More information

 

  • Course of the surface water during a condensation period of several hours is decisive for the risk of microbial manifestation
  • Typical testing time: 2 to 8 hours (without preparation)