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Abstract
During recent years, prefabricated, lightweight, wood based membrane roof components have been increasingly used in Denmark. It has become common practice to build these roofs without ventilation of the cavity between the insulation and the deck. Six types of roof cassettes have been tested in the field for their moisture performance. the roofs have different designs and insulation thicknesses, and several of them use a water permeable vapor retarder. Each of the roof types is placed over a room with typical dwelling conditions and over a more humid room. Some of the roof sections contained construction moisture, while other were installed factory dry. The experiments were also simulated with a numerical model for combined heat and moisture transfer. This paper presents the results for the first two years of the experiment.
During recent years, prefabricated, lightweight, wood based membrane roof components have been increasingly used in Denmark. It has become common practice to build these roofs without ventilation of the cavity between the insulation and the deck. Six types of roof cassettes have been tested in the field for their moisture performance. the roofs have different designs and insulation thicknesses, and several of them use a water permeable vapor retarder. Each of the roof types is placed over a room with typical dwelling conditions and over a more humid room. Some of the roof sections contained construction moisture, while other were installed factory dry. The experiments were also simulated with a numerical model for combined heat and moisture transfer. This paper presents the results for the first two years of the experiment.
Date
12/1992
12/1992
Author(s)
C Rode; G Christensen; M Vesterlokke
C Rode; G Christensen; M Vesterlokke
Page(s)
545-554
545-554
Keyword(s)
mositure condition; thermal performance; insulation; wood based membrane; water permeable vapor retarder; heat transfer;
mositure condition; thermal performance; insulation; wood based membrane; water permeable vapor retarder; heat transfer;