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MMS- Are some unreliable with high RH?
11-07-2011, 03:22 PM,
#8
RE: MMS- Are some unreliable with high RH?
To give you an idea:
ASTM E96 Bostic Moisture Seal's Perm Rating is: 0.12 g/24 hrs/M²mmHg @ 32° C and 50% RH
source: http://bostik.com.au/construction-trade-products-catalogue-sheet-28565-moisture_seal-m-0-g-0.html

ASTM E96 - Koster VAP perm Rating is: 0.024 grams h-1 m-2
source: http://www.kosterusa.com/files/us_en/6.035-VAP-2000.pdf

And as a benchmark:
ASTM E 1745 - Stego wrap has perm: 0.0084 (but I can't find metric #'s for it)

http://www.stegoindustries.com/faqs/what_is_the_difference_between_a_vapor_barrier_and_a_vapor_retarder.html
**Section 7 of ASTM E 1745 specifies the testing conditions and allows for either of the following test methods: ASTM F1249 or ASTM E96.

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RE: MMS- Are some unreliable with high RH? - eaadams - 11-07-2011, 03:22 PM