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Moisture risk in unvented attics due to air leakage paths / prepared by D. Prahl and M. Shaffer, IBACOS, Inc.
Connect to full text Available online
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- Book
- Government document
- Author/Creator:
- Prahl, Duncan, author.
- Shaffer, M., (Matthew), author.
- Language:
- English
- Subjects (All):
- Attics--Moisture--Testing.
- Attics.
- Buildings--Airtightness.
- Buildings.
- Dampness in buildings.
- airtightness.
- dampness.
- Physical Description:
- 1 online resource (ix, 27 pages) : illustrations (some color)
- Place of Publication:
- Golden, CO : U.S. Department of Energy, Energy Efficiency & Renewable Energy, [2014]
- Summary:
- IBACOS completed an initial analysis of moisture damage potential in an unvented attic insulated with closed-cell spray polyurethane foam. To complete this analysis, the research team collected field data, used computational fluid dynamics to quantify the airflow rates through individual airflow (crack) paths, simulated hourly flow rates through the leakage paths with CONTAM software, correlated the CONTAM flow rates with indoor humidity ratios from Building Energy Optimization software, and used Warme und Feuchte instationar Pro two-dimensional modeling to determine the moisture content of the building materials surrounding the cracks. Given the number of simplifying assumptions and numerical models associated with this analysis, the results indicate that localized damage due to high moisture content of the roof sheathing is possible under very low airflow rates. Reducing the number of assumptions and approximations through field studies and laboratory experiments would be valuable to understand the real-world moisture damage potential in unvented attics.
- Notes:
- Title from title screen (viewed on Sept. 14, 2015).
- "Prepared for the National Renewable Energy Laboratory on behalf of the U.S. Department of Energy's Building America Program, Office of Energy Efficiency and Renewable Energy."
- "November 2014."
- "DOE/GO-102014-4526."
- Includes bibliographical references (pages 26-27).
- OCLC:
- 897367771
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