- Author
-
Burch, D. M.
|
Thomas, W. C.
|
Fanney, A. H.
- Title
- Water Vapor Permeability Measurements of Common Building Materials.
- Coporate
- National Institute of Standards and Technology, Gaithersburg, MD
Virginia Polytechnic Inst., Blacksburg
- Journal
-
ASHRAE Transactions,
Vol. 98,
No. Part 2,
486-494,
1992
- Sponsor
- Department of Energy, Washington, DC
- Report
-
BA-92-6-2,
- Book or Conf
- American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. (ASHRAE). Annual Meeting, 1992. Technical and Symposium Papers. June 27-July 1, 1992,
ASHRAE, Atlanta, GA,
Baltimore, MD,
1992
- Keywords
-
water vapor
|
building materials
|
permeability
|
cup method
|
humidity
|
temperature effects
|
siding
- Abstract
- A cup method was used to measure water-vapor transmission in 10 common building materials. The materials included sugar pine, sturdy-brace fiberboard, fiberboard sheathing, particleboard, exterior-grade plywood, plain gypsum board, kraft paper, waferboard siding, vinyl-covered gypsum board, and foam core sheathing. For each material, a series of cup measurements was conducted, and the permeability (or permeance) was plotted as a function of the mean relative humidity across the specimen. Separate measurements, carried out at 24 deg C (75 deg F) and 7 deg C (44 deg F), indicated that temperature has an insignificant effect on permeability. The permeability measurements were compared with other measurements reported in the literature, and the agreement was good in most cases.