Evaluation of Moisture Performance of Tall Wood Building Envelope under Climate Change in Different Canadian Climatic Regions
A study was realized to assess the effects of historical and projected future climates on the hygrothermal performance of cross-laminated timber wall assemblies in 12 Canadian cities belonging to several climate regions and zones and for two cladding and ventilation types. Water ingress in the wall...
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| Veröffentlicht in: | Forests 2023-04, Vol.14 (4), p.718 |
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| creator | Defo, Maurice Wang, Lin Lacasse, Michael A. Moore, Travis V. |
| description | A study was realized to assess the effects of historical and projected future climates on the hygrothermal performance of cross-laminated timber wall assemblies in 12 Canadian cities belonging to several climate regions and zones and for two cladding and ventilation types. Water ingress in the wall assembly was supposed to be 1% wind-driven rain (WDR), and the airflow rate in the drainage cavity was calculated using local climate data. The hygrothermal simulation results showed that under the assumption of no deficiencies allowing wind-driven rain to enter into the wall (perfect wall), there is no risk of mold growth in the future for both claddings, either vented or ventilated. Under the assumption of high moisture loads (1% WDR), the mold growth risk could increase significantly in all climate regions and cities considered. However, in those cities located in the Cordillera and Prairie regions, the increase was not found to be problematic as the maximum mold growth remained under the acceptable level, whereas for cities located in coastal and southeastern regions, the increase in mold growth risk could be considerable. The impacts of cladding and ventilation types on the relative performance of the walls varied with city location. |
| doi_str_mv | 10.3390/f14040718 |
| format | Article |
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Water ingress in the wall assembly was supposed to be 1% wind-driven rain (WDR), and the airflow rate in the drainage cavity was calculated using local climate data. The hygrothermal simulation results showed that under the assumption of no deficiencies allowing wind-driven rain to enter into the wall (perfect wall), there is no risk of mold growth in the future for both claddings, either vented or ventilated. Under the assumption of high moisture loads (1% WDR), the mold growth risk could increase significantly in all climate regions and cities considered. However, in those cities located in the Cordillera and Prairie regions, the increase was not found to be problematic as the maximum mold growth remained under the acceptable level, whereas for cities located in coastal and southeastern regions, the increase in mold growth risk could be considerable. The impacts of cladding and ventilation types on the relative performance of the walls varied with city location.</description><identifier>ISSN: 1999-4907</identifier><identifier>EISSN: 1999-4907</identifier><identifier>DOI: 10.3390/f14040718</identifier><language>eng</language><publisher>Basel: MDPI AG</publisher><subject>Air flow ; Aluminum composites ; Building envelopes ; Building materials ; Chemical properties ; Cities ; Claddings ; Climate change ; Climatic changes ; Climatic data ; Composite materials ; Design ; Energy efficiency ; Environmental aspects ; Flow rates ; Green buildings ; Humidity ; Indoor air quality ; Laminated wood ; Mechanical properties ; Moisture effects ; Mold ; Mold growths ; Performance evaluation ; Precipitation ; Rain ; Risk ; Tall buildings ; Thermal properties ; Timber ; Ventilation ; Wind ; Wood laminates</subject><ispartof>Forests, 2023-04, Vol.14 (4), p.718</ispartof><rights>COPYRIGHT 2023 MDPI AG</rights><rights>2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). 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Water ingress in the wall assembly was supposed to be 1% wind-driven rain (WDR), and the airflow rate in the drainage cavity was calculated using local climate data. The hygrothermal simulation results showed that under the assumption of no deficiencies allowing wind-driven rain to enter into the wall (perfect wall), there is no risk of mold growth in the future for both claddings, either vented or ventilated. Under the assumption of high moisture loads (1% WDR), the mold growth risk could increase significantly in all climate regions and cities considered. However, in those cities located in the Cordillera and Prairie regions, the increase was not found to be problematic as the maximum mold growth remained under the acceptable level, whereas for cities located in coastal and southeastern regions, the increase in mold growth risk could be considerable. 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| source | MDPI - Multidisciplinary Digital Publishing Institute; Elektronische Zeitschriftenbibliothek |
| subjects | Air flow Aluminum composites Building envelopes Building materials Chemical properties Cities Claddings Climate change Climatic changes Climatic data Composite materials Design Energy efficiency Environmental aspects Flow rates Green buildings Humidity Indoor air quality Laminated wood Mechanical properties Moisture effects Mold Mold growths Performance evaluation Precipitation Rain Risk Tall buildings Thermal properties Timber Ventilation Wind Wood laminates |
| title | Evaluation of Moisture Performance of Tall Wood Building Envelope under Climate Change in Different Canadian Climatic Regions |
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