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Laboratory Investigation and Field Monitoring of Pressure Equalized Rainscreen Walls

Richard Quirouette
Laboratory Investigation and Field Monitoring of Pressure Equalized Rainscreen Walls by Richard Quirouette PDF

Author : Richard Quirouette
Publisher : CMHC
Page : 20 pages
File Size : 30,64 MB
Release : 1996
Category : Exterior walls
ISBN :

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This report is the first of three reports on rainscreen performance research. It examines the first area of interest, field performance monitoring and wetting and drying of rainscreen cavities. The field monitoring of existing rainscreen walls was undertaken in two buildings. These included a metal and glass curtain wall at the University of Quebec in Hull, Quebec and a limestone cladding and architectural precast rainscreen wall on the new Canada Life Building in Toronto, Ontario. A laboratory investigation at Queens University examined the wetting and drying of a metal and glass curtain wall rainscreen system. This project revealed considerable information. While there were only two rainscreen systems monitored in the field, those two and similar experiences elsewhere by the author confirmed that pressure equalization in current rainscreen wall and window systems is virtually non existent. Several reasons were found but for the cases reviewed, the weep and vent openings were too small for the volumes served and the compartment seals were deficient or non existent. The rain penetration monitoring method using humidity and temperature of the cavity is quite promising but complex to interpret and will require further investigation. While pressure equalization was found to be poor in the cases studied, there were no observed water penetration problems. Further work in the area should include a more detailed examination of the wetting and drying of rainscreen wall types to distinguish between the effects of water storage in masonry claddings and the cavity moisture balance and the effects of other non water absorbing rainscreen wall systems.

Progress Report #3

William Colin Brown
Progress Report #3 by William Colin Brown PDF

Author : William Colin Brown
Publisher :
Page : 16 pages
File Size : 21,70 MB
Release : 1995
Category :
ISBN :

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