This paper discusses the results of a research project which aimed at determining the hygrothermal (i.e. thermal and moisture) performance of the Canadian wood-frame building envelope construction in the city of Shanghai in China. The performance assessments of the wood-frame walls were conducted using the two-dimensional hygrothermal simulation tool called hygIRC-2D. In this study an in-fill type wall was considered and hygrothermal simulations were carried out for the weather conditions of Shanghai. Investigations were conducted to determine the influence of the vapour barrier, exterior stucco cladding material and different types of sheathing boards on the moisture performance of in-fill walls. Additional simulations were carried out to determine the influence of air leakage on the moisture performance of in-fill walls. The outputs from the simulations were analysed with the help of a hygrothermal response indicator called RHT index. It was concluded that the design of the in-fill wall including a rain screen but omitting a vapour barrier is expected to lead to the maximum reduction in hygrothermal loading when exposed to the weather conditions of Shanghai, China.
Mukhopadhyaya P. , Van Reenen D., Assessment of Moisture Performance of Wood Frame Walls in China and Taiwan. National Research Council Canada IRC/NRC, Ottawa, Client Final Report. Report No: B1083.1, pp. 1–170, 16 July 2007.
Canada Wood. Wood—Concrete Hybrid Construction. International Building Series: NO.9.
Nofal M. , Kumaran M.K. (1999), Durability assessments of wood-frame construction using the concept of damage- functions. In: Proceedings of the 8th international Conference Durability of Building Materials and Components.
Maref W. , Lacasse M.A., Booth D.G., Benchmarking of IRC’s Advanced Hygrothermal Model — hygIRC: Using Mid- and Large-Scale Experiments. National Research Council Canada, IRC-RR-126, December 2002.
Kumaran K. , Lackey J., Normadin N., Tarikhu F, Van Reenen D. (2004), A thermal and moisture transport property database for common building and insulating materials. Final Report from ASHRAE Research Project 1018-RP, pp. 1–229.
Mukhopadhyaya P. , Kumaran M.K., Prediction of Moisture response of wood frame walls using IRC’s Advanced Hygrothermal Model (hygIRC). Proceedings of 2nd Annual Conf. on Durability and Disaster Mitigation in Wood-Frame Housing, pp. 221–226. November, 2000.
Khanagry R.E. (2008), Assessment of moisture performance of Canadian wood-frame envelopes in Taiwan. M. Eng Project Report, Dept. Civil and Env. Eng., Carleton University, Ottawa, Canada.
Maref W. , Cornick S., Abdulghani K., Van Reenen D., An advanced hygrothermal design tool 1-D hygIRC. Proceedings of Canadian conference on building energy simulation (eSim) (NRCC-46902) Vancouver, B.C., pp. 190–195, June 10–11, 2004.
Mukhopadhyaya P. , MEWS project produces long-term moisture response indicator. Building envelope and structure —Construction Innovation, 8(1), NRC-CNRC, March 2003.