STUDY ON HYGROTHERMAL BEHAVIOR OF WALL ASSEMBLY WITH VENTED CAVITY IN CONSIDERATION OF DRIVING RAIN (PART 2): IMPACT OF COMPONENTS IN THE VENTED CAVITY OF AN EXTERIOR SYSTEM ON THE DRAINAGE AND AIRFLOW RATE

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  • OSAMURA Sadaharu
    Misawa Homes Institute of Research and Development Co. Ltd.
  • SAITO Hiroaki
    Faculty of Engineering, Division of Architecture and Civil Engineering, Ashikaga University
  • NAKAJIMA Masao
    Dept. of Architecture and Environment, Kanto Gakuin University

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Other Title
  • 雨掛かりを考慮した外壁通気構法の水分挙動に関する研究（その2）：通気層の構成部材による排水及び通気特性への影響

Abstract

<p>Although it is said that moisture condensation at the vapor retarder doesn’t occur in wall assembles with vented cavity, our previous study reported that rain penetration and water absorption of exterior system affects the condensation. This research is focused on unraveling of mechanism of the internal condensation caused by driving rain experimentally. Drying and drainage performances of the vented cavity were confirmed in the lab-experiments using mock-up wall specimens. In the field measurement, the impact of driving rain on the internal condensation was demonstrated through intermittent injected rainwater, and the drying and drainage performances of different configurations were compared.</p>

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