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Oxnard, Ca
Posts: 110
Joined: Jan, 2008
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Gaston, Oregon
Posts: 8090
Joined: Dec, 2003
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 Efflorescence Question
[#2] Posted: 02/22/2012 - 08:31:46 AM |  |  |
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Hydrostatic pressure isn't necessary. I see efflorescence as a result of capillary water movement all the time.
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Jim Katen, Oregon
www.amipdx.com |
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Ashland, VA
Posts: 2938
Joined: Jan, 2006
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Efflorescence Question
[#3] Posted: 04/02/2012 - 7:20:51 PM | | |
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Richmond, VA has a ton of homes ranging between the mid 1800s and early 1900s with plaster walls and ceilings over wood lath. Any time moisture intrudes for a long period of time through plaster, efflorescence is the end result. I can't think of a time I observed it being the result of high humidity. It is typically a roofing/flashing issue or missing mortar in solid masonry walls.
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| "This above all: to thine own self be true." - William Shakespeare |
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Garland, Texas
Posts: 201
Joined: Mar, 2002
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Efflorescence Question
[#4] Posted: 04/03/2012 - 2:16:35 PM | | |
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elementary explanation
water in vapor moves from warm toward cool
think cold adult beverage on a warm summer day where is the condensate?
outside of the adult beverage container
i'd imagine where you're at, warm coastal=moist warm outside, dry cool=air-conditioned inside
capillary transfer would deposit and dry on the interior
air leakage, absence or breeches in vapor barrier might be the causative source
not nice to install building materials incorrectly, argue with mother nature or try to combat physical laws
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Barry Adair
trec#4563
http://www.adairinspection.com
life is the random lottery of events followed by numerous narrow escapes...accept the good |
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