Download PDF by Barry G. Hardman, Carl R. Wagus and Theresa A. Weston,: Performance and Durability of the Window-Wall Interface

By Barry G. Hardman, Carl R. Wagus and Theresa A. Weston, editors

ISBN-10: 080313410X

ISBN-13: 9780803134102

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Extra info for Performance and Durability of the Window-Wall Interface (ASTM special technical publication, 1484)

Sample text

In a recent report by RDH Building Engineering Limited in Canada [1], a wide variety of window types and assemblies were tested for leakage, using six potential leakage paths for water intrusion. Although water leakage was found to some extent in all of the leakage paths, the “through window to wall interface to adjacent wall assembly” leakage path was the most prevalent for all of the window types tested and had a high risk of consequential damage to the building. The causes for this are many, but improper flashing installation and over-reliance on building sealants were noted consistently as contributing effects in this report.

44 PERFORMANCE DURABILITY OF WINDOW-WALL INTERFACE Thus, it can be generally concluded that the self-adhered flashing products have good adhesion to PVC and painted steel without the use of primer, particularly when applied at temperatures above freezing. Adhesion to Fiberglass Coated Sheathing—Fiberglass coated gypsum sheathing board is commonly used in commercial construction. This sheathing presents special challenges for selfadhered flashing products, as well as other adhesive products, due to the loosely bonded fiberglass, which readily pulls away from the surface, causing a “sheathing failure” mechanism at low peel force.

Codes and standards related to WRBs were developed not as a result of evaluation of the functional requirements for WRBs, but instead from institutionalizing the properties of existing materials that have been used traditionally and from adapting to the properties of new materials. Information about the optimal properties of a WRB has not been developed, and there is little reliable information available that compares the critical properties of available and competing WRB products. Marketing and tradition appear to have played a major role in shaping perceptions of WRBs by both the public and building industry professionals.

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Performance and Durability of the Window-Wall Interface (ASTM special technical publication, 1484) by Barry G. Hardman, Carl R. Wagus and Theresa A. Weston, editors


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