Vapour retarders in wood frame walls and their effect on the drying capability

作     者：Stig Geving Jonas Holme 

作者机构：Norwegian University of Science and Technology Trondheim NO-7491 Norway SINTEF Building and Infrastructure Trondheim NO-7465 Norwoy 

出 版 物：《Frontiers of Architectural Research》 (建筑学研究前沿（英文版）)

年 卷 期：2013年第2卷第1期

页      面：42-49页

核心收录：

学科分类：0303[法学-社会学] 1305[艺术学-设计学（可授艺术学、工学学位）] 0601[历史学-考古学] 0202[经济学-应用经济学] 08[工学] 081402[工学-结构工程] 081304[工学-建筑技术科学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0813[工学-建筑学] 0814[工学-土木工程] 0833[工学-城乡规划学] 

基　　金：the SINTEF strategic institute project "Climate Adapted Buildings" 

主　　题：Vapour barrier Vapour retarder Wood frame watt Drying Moisture 

摘      要：Wood frame wails typically need a vapour barrier at the warm side to avoid interstitial condensation due to vapour diffusion and air leakages from the interior. A more vapour open material than the traditional vapour barriers, here calted vapour retarder, could allow condensed moisture, buiLt-in-moisture or moisture from minor leakages to dry to the interior in addition to the outward drying. The application of permeable vapour retarders in wood frame wails have been investigated in this study by the use of a hygrothermat simulation tool. A traditional wood frame wail usually has good drying possibilities to the exterior. If a vapour retarder should have an effect on the total drying, it must not be too vapour tight. The purpose of this study was to find some threshold value for the maximum vapour resistance of a vapour retarder--when a requirement is that it should have a relatively large effect of the total drying of the wail. The increased risk for condensation as the vapour resistance decreases has however not been investigated in this study. In general it was found that permeable vapour barriers have retatively littte effect on the total drying of ordinary wood frame waits in a Nordic ctimate.