Assessing the Effectiveness of Wall-Window Interface Details to Manage Rainwater—Selected Results from Window Installation to a Wall Sheathed in Extruded Polystyrene

Abstract

/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://dx.doi.org/10.1520/JAI101270Journal of ASTM International, 6, 9, pp. 1-43, 2009-10-01 Assessing the effectiveness of wall-window interface details to manage rainwater -selected results from window installation to a wall sheathed in extruded polystyrene The material in this document is covered by the provisions of the Copyright Act, by Canadian laws, policies, regulations and international agreements. Such provisions serve to identify the information source and, in specific instances, to prohibit reproduction of materials without written permission. For more information visit http://laws.justice.gc.ca/en/showtdm/cs/C-42Les renseignements dans ce document sont protégés par la Loi sur le droit d'auteur, par les lois, les politiques et les règlements du Canada et des accords internationaux. Ces dispositions permettent d'identifier la source de l'information et, dans certains cas, d'interdire la copie de documents sans permission écrite. ABSTRACT:The detailing of wall-window interfaces and the consequences of defective installation of windows is an on-going concern in North America. This manuscript concerns laboratory evaluation of the water leakage performance of a select set of window-wall interface details. The details were for windows with mounting flanges installed in wood-frame walls sheathed with rigid extruded polystyrene foam. The tests were performed on a single full scale test assembly in which two identical windows were installed by two similar but nonetheless different means. Each detail included a sill pan intended to collect water that gained entry into the assembly and thus was designed to be robust (tolerant of flaws). Tests were performed over a series of different water loading (spray) rates, and over a series of different air pressure differentials at each spray rate. Air leakage rates through the window opening were monitored; they were controlled by a unique methodology. Leakage paths were introduced in the window frames and these paths were alternatively blocked or opened to permit evaluation of the performance of the installation details under two different assumed conditions of window leakage. Air pressure distribution within the assemblies was monitored during spray testing. The wall assembly were designed to permit observation of water entry in it, and to allow ...

Drainage of infiltrated rainwater in wall assemblies: Test method, experimental quantification, and recommendations

“…It is therefore of importance to choose dosage rates based on expected infiltration rates that can be obtained by laboratory studies on watertightness testing or from field studies for which water entry in wall assemblies has been monitored. In this study flow rates of 0.057 6 0.001 l/min for multiple entry points or a total flow rate of 0.693 6 0.006 l/ min (= 2.888 6 0.025 l/min.m over a length of 240 mm or 1.925 6 0.017 l/min.m 2 for a specimen area of 0.36 m 2 ) and 0.090 6 0.001 l/min for a single entry point as maximum values based on infiltration rates obtained in laboratory studies on different wall assemblies (Lacasse et al, 2003(Lacasse et al, , 2009(Lacasse et al, , 2019Olsson, 2016aOlsson, , 2016b.…”

Watertightness performance of face-sealed versus drained window-wall interfaces

“…Lacasse et al [12] evaluated the performance of face-sealed and drained sealing methods for vinyl windows installed in wood-frame walls sheathed with extruded polystyrene foam insulation board. It was concluded that when a rubber gasket was installed at the exterior joint between the window frame and the cladding in a facesealed manner, a significantly smaller amount of water was collected behind the cladding compared to the drained specimen.…”

Assessing the Effectiveness of Wall-Window Interface Details to Manage Rainwater—Selected Results from Window Installation to a Wall Sheathed in Extruded Polystyrene

“…The test program described in this manuscript followed that used in previous studies [10,11,12]; the ability of different wall-window installation details to manage rainwater was determined on the basis of watertightness tests and the response of the respective interface details to simulated conditions of wind-driven rain.…”

“…The Dynamic Wind and Wall Test Facility (DWTF), used to subject similar specimens to simulated winddriven rain conditions in previous studies [10,11,12,16] was used in this investigation. The facility is capable of subjecting full-scale test specimens (nominal size 2.44 by 2.44-m) to static levels of air pressure differential or to air pressure differentials that fluctuate dynamically; the dynamic pressure fluctuation capabilities of the facility were not however used in this investigation.…”

“…T hey have also addressed the influence of airtightness of installations on their resistance to water leakage Results of IRC studies relating to window installation practice in Canada are reported National Research Council of Canada (NRCC) publications [10,11]. Results relating to installation practice in the United States are reported in the Journal of ASTM International [12]. This paper concerns laboratory evaluation of the watertightness of a select set of wall-window interface details.…”