1 option
Moisture management for high R-value walls / prepared by R. Lepage, C. Schumacher, and A. Lukachko, Building Science Corporation.
- Format:
- Book
- Government document
- Author/Creator:
- Lepage, R., author.
- Schumacher, C., author.
- Lukachko, A. (Alex), author.
- Language:
- English
- Subjects (All):
- Dampness in buildings--Computer simulation.
- Dampness in buildings.
- Exterior walls--Thermal properties--Computer simulation.
- Exterior walls.
- Walls--Moisture.
- Walls.
- Dwellings--Insulation.
- Dwellings.
- Genre:
- Online resources.
- Physical Description:
- 1 online resource (ix, 110 pages) : illustrations (some color)
- Place of Publication:
- Golden, CO : U.S. Department of Energy, Energy Efficiency & Renewable Energy, Building Technologies Office, 2013.
- Summary:
- The following report explains the moisture-related concerns for High R-value wall assemblies and discusses past Building America research work that informs this study. Hygrothermal simulations were prepared for several common approaches to High R-value wall construction in six cities (Houston, Atlanta, Seattle, St. Louis, Chicago, and International Falls) representing a range of climate zones (2, 3, 4C, 4, 5A, and 7, respectively). The simulations are informed by experience gained from past research in this area and validated by field measurement and forensic experience. The modeling program was developed to assess the moisture durability of the wall assemblies based on three primary sources of moisture: construction moisture, air leakage condensation, and bulk water leakage. The peak annual moisture content of the wood based exterior sheathing was used to comparatively analyze the response to the moisture loads for each of the walls in each given city. Walls which experienced sheathing moisture contents between 20% and 28% were identified as risky, whereas those exceeding 28% were identified as very high risk. All of the wall assemblies perform well under idealized conditions. However, only the walls with exterior insulation, or cavity insulation which provides a hygrothermal function similar to exterior insulation, perform adequately when exposed to moisture loads. Walls with only cavity insulation are particularly susceptible to air leakage condensation. None of the walls performed well when a precipitation based bulk water leak was introduced to the backside of the sheathing, emphasizing the importance of proper flashing details.
- Notes:
- "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 2013."
- "NREL technical monitor: Cheryn Metzger."
- "DOE/GO-102013-4266"--Page 120
- Includes bibliographical references (pages 77-79).
- Title from title screen (viewed on May 1, 2014).
- OCLC:
- 878852777
The Penn Libraries is committed to describing library materials using current, accurate, and responsible language. If you discover outdated or inaccurate language, please fill out this feedback form to report it and suggest alternative language.