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ASTM Selected Technical Papers
Thermal Insulation, Materials, and Systems for Energy Conservation in the '80s
By
FA Govan
FA Govan
1
Vice President of Professional Services
,
Ziel-Blossom & Associates, Inc.
,
Cincinnati, Ohio
;
conference chairman and editor
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DM Greason
DM Greason
2
Research Leader
,
Foam Products TS&D, Dow Chemical USA
,
Granville, Ohio
;
conference vice chairman — Technical Program and editor
Search for other works by this author on:
JD McAllister
JD McAllister
3
Senior Mechanical Engineer
,
American Electric Power Service Corporation
,
New York, N.Y.
;
conference co-chairman and editor
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ISBN-10:
0-8031-0230-5
ISBN:
978-0-8031-0230-9
No. of Pages:
905
Publisher:
ASTM International
Publication date:
1983

In response to increasing energy costs, high thermal resistance insulation systems are being marketed for pre-engineered metal buildings. Historically, blanket insulation has been installed between the skin and the structure of these buildings. The new insulation systems generally are installed inside the structure; thus the structure is colder and, unless an effective retarder is included, water vapor condensation problems can result.

While the vapor permeance of various insulation facing materials is documented, the effect of such field conditions as seams and penetrations is less well known. Permeance tests were performed on samples of foil-kraft paper insulation facing with two seams and two penetration configurations. The tests show that seams can multiply the permeance of the vapor retarder by factors of 1.2 or more and penetrations can multiply the permeance by 3 or more.

The theory of vapor flow analysis is reviewed and compared with the test results and presented graphically. Possible applications and suggestions for further investigation are discussed.

1.
Metal Building Review
, Vol.
17
, No.
6
,
06
1981
.
2.
Waite
,
H. J.
and
Snyder
,
M. K.
in
Proceedings
,
ASHRAE/DOE-ORNL Conference on Thermal Performance of the Exterior Envelopes of Buildings
,
American Society of Heating, Refrigerating, and Air-Conditioning Engineers
,
12
1979
.
3.
Handbook of Fundamentals
,
American Society of Heating, Refrigerating, and Air-Conditioning Engineers
,
1977
, p. 20.3.
4.
Samuelson
,
I.
, “
Moisture Transfer in Steel Deck
,” Report 67,
Division of Building Technology, Lund Institute of Technology
, Sweden,
1976
.
5.
Babbitt
,
J. D.
,
Canadian Journal of Research
 0366-6581, Vol.
19
,
03
1941
, pp. 42-55.
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