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ASTM Selected Technical Papers
Moisture Migration in Buildings
By
M Lieff
M Lieff
1
County College of Morris
,
Dover, N.J. 07801
;
symposium co-chairman and co-editor
.
Search for other works by this author on:
HR Trechsel
HR Trechsel
2
H. R. Trechsel Associates
,
Germantown, Md. 20874
;
symposium co-chairman and co editor
.
Search for other works by this author on:
ISBN-10:
0-8031-0605-X
ISBN:
978-0-8031-0605-5
No. of Pages:
301
Publisher:
ASTM International
Publication date:
1982

This paper reports on the design of an experimental facility to examine moisture levels in the various components of a building envelope over the course of seasonal weather patterns. Using analytical methods, the pertinent factors in moisture accumulation were identified and the wall panels were built using a range of these factors. In addition to the permeance of the building materials, the effect of solar heating and interior vapor pressure also were studied. In this way, the relative importance of these variables can be compared while at the same time allowing the other factors of actual weather conditions, such as wind and precipitation, to be included as random variables. By using this approach, a realistic appraisal of the relationship between these factors and moisture accumulation can be made. To illustrate the capabilities of this facility, some preliminary data collected the first year are shown and compared to model predictions using the recorded weather conditions. Limitations of the experimental program as well as future research needs are discussed.

1.
Stewart
,
M. B.
, “
Annual Cycle Moisture Analysis
,”
Proceedings of the American Society of Heating, Refrigerating, and Air-Conditioning Engineers/Department of Energy (ASHRE/DOE) Conference on Thermal Performance of the Exterior Envelopes of Buildings
,
ASHRAE, Inc.
,
1981
.
2.
Burch
,
D. M.
,
Treado
,
S. J.
, and
Contereras
,
A. G.
, “
The Use of Low-Permeability Insulation as an Exterior Retrofit System—A Condensation Study
,”
ASHRAE Transactions
 0001-2505, Vol.
2
,
1979
, p. 85.
3.
Luikov
,
A. V.
,
Heat and Mass Transfer in Capillary-Porous Bodies
, 1st English Ed.,
Pergamon Press
,
Oxford
,
1966
.
4.
Duff
,
J. E.
, “
A Probe for Accurate Determination of Moisture Content of Wood Products in Use
,” U.S. Forest Service Research Note, FPL-0142,
08
1966
.
5.
Shurcliff
,
W. A.
,
Superinsulated Houses and Double Envelope Houses
, 2nd ed., no publisher, Cambridge, Mass.,
04
1980
.
6.
U.S. Department of Energy
, “
Minnesota Retrofit Insulation in situ Test Program
.” HCP/W 2843-01 UC-95d,
06
1978
.
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