Performance-based development of a thermally insulated pitched roof system
Hens, H.
1998
ASHRAE Trans., Vol. 104(2), pp. 941-950
Hens, H., (1998), "Performance-based development of a thermally insulated pitched roof system", ASHRAE Trans., Vol. 104(2), pp. 941-950.
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Tiled and slated roofs in Western Europe are constructed using rafters, an underlay, counter-battens, and battens. Once the tiles or slates are fixed, thermal insulation, in most cases mineral fiber, is inserted between the rafters, a vapor and air barrier added, and the pitch finished with an internal lining. Although simple, construction nevertheless requires extra skill. Also, the hygrothermal performance is quite sensitive to poor workmanship.
This paper describes development of a new pitched roof, with the vapor retarder, thermal insulation, air retarder, and weatherproofing layer combined into one composite. This composite is fixed directly on the rafters. Performance requirements are adequate mechanical strength, high thermal resistance, good airtightness, correct moisture response, minimum thermal bridging, acceptable acoustical insulation, and acceptable fire resistance. The paper discusses the design process, with emphasis on the heat-, moisture-, and air-related aspects. |
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Related Concepts
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Related Resources:
 ASHRAE-American Society of Heating, Refrigerating and Air-Conditioning Engineers
"the sole purpose of advancing the arts and sciences of heating, ventilation, air conditioning and refrigeration for the public's benefit through research, standards writing, continuing education and publications."
- Laboratory of Building Physics, Leuven, Belgium
"...research and educational activities in the field of heat and mass transfer in building materials, building parts and buildings, the energy use in buildings, building installations and building acoustics. Also research in urban physics is part of our activities.
- Journal: ASHRAE Transactions
- Laboratory of Building Physics- Leuven, Belgium
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