Effect of insulating sheathing on heat and moisture flow
| Autor: | H. B. Doshi, J. Timusk |
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| Rok vydání: | 1986 |
| Předmět: | |
| Zdroj: | Canadian Journal of Civil Engineering. 13:674-680 |
| ISSN: | 1208-6029 0315-1468 |
| DOI: | 10.1139/l86-102 |
| Popis: | Wood-frame walls with low and high water vapour permeance insulating sheathings were tested in a climate simulator with respect to moisture and thermal performance. Exfiltration of moist interior air through the walls was simulated by pumping moist air into wall cavities from the warm side of the climate simulator where the walls were tested. It was found that ventilation slots in extruded polystyrene sheathing did not improve the drying ability of the walls. Incomplete filling of wall cavities with glass-fibre batt insulation, the presence of ventilation slots, and temperature difference across the walls had, if at all, a very small effect on thermal performance. The ability of glass-fibre-board insulating sheathing to store water condensed from exfiltrating air was improved by installing the sheathing with the spun-bonded polyolefin membrane facing the cold side. Key words: exterior walls, insulating sheathing, air exfiltration, condensation, thermal resistance, workmanship. |
| Databáze: | OpenAIRE |
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