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

Lacasse, M. A.; Armstrong, M.; Ganapathy, G.; Rousseau, M.; Cornick, S. M.; Bibee, D.; Shuler, D.; Hoffee, A.

doi:10.1520/stp48951s

Cited by 1 publication

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“…Water infiltration at windows and fenestration products -A number of studies have been completed regarding water infiltration at windows, including those completed by Lacasse et al [15], in which water entry rates of deficient windows installed in a number of different typical wood-frame wall assembly types were characterised in respect to rates of entry, air pressure differential across the wall, and the wall air leakage rate. Thereafter, a series of studies were completed of water infiltration at window penetrations in respect to different window installation methods typical of North American construction for various wood-frame wall assemblies; these have been published in Lacasse et al [30,31]. The results indicate that water enters even when no pressure is applied.…”

Section: Overview Of Water Infiltration Of Wall Assembliesmentioning

confidence: 99%

A brief compendium of water entry results derived from laboratory tests of various types of wall assemblies

et al. 2019

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There is an increase in the use of hygrothermal models to complete the performance evaluation of walls assemblies, either in respect to design of new assembles or the retrofit of existing wall assemblies. To this end there are guides available in which is provided information on moisture loads to wall assemblies. This includes, for example, Criteria for Moisture-Control Design Analysis in Buildings given in ASHRAE 160, Assessment of moisture transfer by numerical simulation provided in EN 15026, and NRC’s “Guidelines for Design for Durability of the Building Envelope”. The designer of a new assembly or evaluator of an existing wall is tasked with having to determine what moisture loads to apply to the wall and where to apply this load within the assembly. Typically there is little or no information that is readily available regarding moisture loads to walls and thus the suggested hourly moisture load, as given in ASHRAE 160, is 1% by weight of the total driving rain load to the wall (i.e. kg/m2-hr). In this paper, a brief compendium of water entry test results derived from laboratory tests of various types of wall assemblies is provided from which estimates of moisture loads to different types of wall can be developed. Water entry test results are given of wood frame walls typically used in housing, but also metal-glass curtain walls and other commercial wall assemblies, where possible, in terms of driving loads to the wall.

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Section: Overview Of Water Infiltration Of Wall Assembliesmentioning

confidence: 99%