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)