Water penetration of cladding components : an overview of the vulnerability of sealed joints to water penetration

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Conference12th Canadian Conference on Building Science and Technology: 06 May 2009, Montréal, Quebec
Pages112; # of pages: 12
Subjectfault tolerance, joint deficiencies, sealant failure, watertightness, water penetration, testing; Hygrothermal properties
AbstractThe deterioration of jointing compounds used to seal building joints has been thoroughly investigated whereas that of relating the consequences of failure of jointing products, whilst generally understood, has not been studied in depth, in particular in respect to loss in watertightness. Jointing products age due to natural weathering effects that, in time, lead to deficiencies in the product and, in turn, lead to the local failure of the jointing system. Deficiencies may also occur from design faults or improper installation. Water penetration at deficiencies may lead to a number of different deteriorating effects on the building fabric that may induce failure of other envelope components or the loss in adhesion of the sealant. Joints are also subjected to significant wind-driven rain loads in particular atop multi-storey buildings located along an exposed coastline. To what extent are joints vulnerable to water leakage when subjected to a rain event, such as a typhoon, as might be experienced in Japan, or a hurricane as in North America? The question of fault tolerance in jointing systems has not yet been broadly explored. An overview is provided on the nature of water entry at sealed joints of cladding systems and information is also presented on a study related to water penetration at joints. Small deficiencies in jointing systems may lead to significant water entry when such joints are subjected to severe wind-driven rain loads.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number51214
NPARC number20373863
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Record identifier9bdd0074-6e4a-4edb-8361-6d32d905946d
Record created2012-07-23
Record modified2016-05-09
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