- Author
- Djebbar, R. | Mukhopadhyaya, P. | Kumaran, M. K.
- Title
- Retrofit Strategies for a High-Rise Wall System and Analysis of Their Hygrothermal Effects.
- Coporate
- National Research Council of Canada, Ottawa, Ontario
- Report
- NRCC-46033,
- Distribution
- FOR MORE INFORMATION CONTACT: National Research Council of Canada, Institute for Research in Construction, Ottawa, Ontario, K1A 0R6, Telephone (613) 993-2607, Fax: (613) 952-7673, Email: Irc.Client-Services@nrc.ca Website: http://irc.nrc-cnrc.gc.ca/fulltext/nrcc46033/
- Book or Conf
- Building Physics, 11th Symposium. Proceedings. September 26-30, 2002, Dresden, Germany, 738-746 p., 2002
- Keywords
- walls | high rise buildings | masonry | moisture | durability
- Identifiers
- typical moisture failures in wall assemblies with brick veneer and steel stud back-up (BV/SS); moisture durability analysis using hygrothermal indicators; moisture mass index (MMi); freeze-thaw index (FT); RHT index (RHT); Moisture Management in Exterior Wall Systems (MEWS)
- Abstract
- An analytical approach to quantify and assess the effect of building envelope retrofit strategies on the long-term hygrothermal performance of masonry wall assemblies in high-rise buildings is presented in this paper. This approach has resulted from an on-going research project that has the main objective to predict effects of adding supplementary insulation and air-sealing retrofit options on several types of wall assemblies, used in both commercial and residential high-rise buildings throughout different geographical locations in the country (Canada). A set of three hygrothermal indicators are defined and used to compare between the relative moisture performance of different retrofit strategies. These hygrothermal indicators predict the degree and potential for moisture related damage due to frost, chemical or biochemical attacks as well as efflorescence-subflorescence and swelling of the masonry envelope components. The impact of indoor environment and type of ventilation, the outdoor weather are also addressed by using these hygrothermal indicators.