The Problem of achieving weathertight joints

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ConferenceSymposium on Weathertight Joints for Walls: 1967-09, Oslo, Norway
Subjectweatherproof joints; air leakages; rain penetration; buildings; walls; Wind loads; Air flow/Wind pressure
AbstractThe penetration of rain into a building is an age-old problem. A study of past and present building methods shows that there have been two basic approaches to the design of walls and joints. One is to attempt to eliminate all openings that might let water enter the construction, both in the masonry walls and in the fenestration; the other is to shed the water by using overlapping units, such as shingles, siding and thatch. These approaches are still used today. The various attempts to seal exterior wall surfaces have never been completely satisfactory. This is easily seen by the use of cornices, belt courses, mortar and stucco finishes, interior finishes for gaskets and cavity wall construction to improve the performance of walls designed on the basis of this principle. Wall design using overlapping units has proved effective in preventing rain penetration. In some cases in which wind-blown rain is particularly heavy, overlapping units, such as facing on masonry walls, was even used. Owing to the positive results obtained with overlapping units, this method is commonly used to limit rain penetration through the roofs of various types of buildings. With the objective of achieving weathertight joints, it is essential to fully understand all functional requirements, the various physical phenomena influencing joint performance and the close interdependence of all these factors.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number9874
NPARC number20375886
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Record identifier245c3a24-f22f-48fe-a46a-0a89dac47092
Record created2012-07-23
Record modified2016-05-09
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