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RLC Engineering, LLC.


Mold & Rot Locator

Condensation occurs when a surface is cooler than the dew point temperature of the air next to the surface. At this temperature, the air becomes saturated with water. This is equivalent to 100% relative humidity. When condensation occurs, mold and decay are very likely. Mold can grow when the air is damper than about 80% relative humidity. To help locate potential problem spots , use the following calculator to determine temperatures where condensation, decay and mold may occur on surfaces exposed to outside summer air.


Select a City: to use ASHRAE design criteria for that city,

or          Enter a temperature: degrees (F)

               Enter a Relative Humidity: (%)

Condensation and Decay may occur on surfaces below degrees (F)

Mold and mildew may grow on any surface below about degrees (F)



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Spalding Computer Services
Last Update: 01/13/2002