- Author
-
Dill, R. S.
|
Cottony, H. V.
- Title
- Laboratory Observations of Condensation in Wall Specimens.
- Coporate
- National Bureau of Standards, Washington, DC
- Report
-
BMS 106
August 2, 1946
11 p.
- Keywords
-
walls
|
condensation reactions
|
vapor pressure
|
water vapor
- Abstract
- Water-vapor migration and condensation in walls were investigated by means of a laboratory apparatus whereby a specimen wall was exposed to cold air on one side and to warm, humidified air on the other side. The wall was insulated and protected against water-vapor condensation in various ways for purposes of observation. The test conditions were a little more severe than those ordinarily expected anywhere in the continental United States. The observed relation between vapor pressure and condensation and the observed effects of vapor barriers are described and discussed. In this investigation, it was found that condensation occurred within a heavily insulated wall, but that conditions conducive to condensation within the wall structure could be avoided by the use of an effective vapor barrier or by ventilating the interior of the wall with cold air.