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Performances of highly insulated compact zinc roofs under a humid-moderate climate, part I: hygrothermal behavior

(2010) JOURNAL OF BUILDING PHYSICS. 34(2). p.178-191
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Abstract
Four flat compact zinc roofs with a U-value less than 0.25 W/(m(2) K) were investigated under a humid-moderate climate. Two roofs had a heavyweight deck, the other two a lightweight deck. The heavyweight roofs exhibited a satisfactory thermal behavior. The small amount of moisture accumulation in the insulation did not result in a measurable degradation of thermal quality of the zinc roofs. It was found that the moisture situation at the sheeting underside was much better in the heavyweight roofs than in the lightweight roofs. However, in the heavyweight roof with a perfect air-vapor retarder, a large number of wetting/drying cycles at the sheeting underside were measured in winter. Strong sheeting undercooling was also observed in the four roofs during the test period. The results show that it is possible to build low U-value compact zinc roofs with a perfect thermal performance.
Keywords
under cooling, REGION, moisture content, condensation, thermal resistance, metallic roofs

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Citation

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Chicago
Zheng, R, Arnold Janssens, J Carmeliet, W Bogaerts, and H Hens. 2010. “Performances of Highly Insulated Compact Zinc Roofs Under a Humid-moderate Climate, Part I: Hygrothermal Behavior.” Journal of Building Physics 34 (2): 178–191.
APA
Zheng, R., Janssens, A., Carmeliet, J., Bogaerts, W., & Hens, H. (2010). Performances of highly insulated compact zinc roofs under a humid-moderate climate, part I: hygrothermal behavior. JOURNAL OF BUILDING PHYSICS, 34(2), 178–191.
Vancouver
1.
Zheng R, Janssens A, Carmeliet J, Bogaerts W, Hens H. Performances of highly insulated compact zinc roofs under a humid-moderate climate, part I: hygrothermal behavior. JOURNAL OF BUILDING PHYSICS. 2010;34(2):178–91.
MLA
Zheng, R, Arnold Janssens, J Carmeliet, et al. “Performances of Highly Insulated Compact Zinc Roofs Under a Humid-moderate Climate, Part I: Hygrothermal Behavior.” JOURNAL OF BUILDING PHYSICS 34.2 (2010): 178–191. Print.
@article{1202103,
  abstract     = {Four flat compact zinc roofs with a U-value less than 0.25 W/(m(2) K) were investigated under a humid-moderate climate. Two roofs had a heavyweight deck, the other two a lightweight deck. The heavyweight roofs exhibited a satisfactory thermal behavior. The small amount of moisture accumulation in the insulation did not result in a measurable degradation of thermal quality of the zinc roofs. It was found that the moisture situation at the sheeting underside was much better in the heavyweight roofs than in the lightweight roofs. However, in the heavyweight roof with a perfect air-vapor retarder, a large number of wetting/drying cycles at the sheeting underside were measured in winter. Strong sheeting undercooling was also observed in the four roofs during the test period. The results show that it is possible to build low U-value compact zinc roofs with a perfect thermal performance.},
  author       = {Zheng, R and Janssens, Arnold and Carmeliet, J and Bogaerts, W and Hens, H},
  issn         = {1744-2591},
  journal      = {JOURNAL OF BUILDING PHYSICS},
  keyword      = {under cooling,REGION,moisture content,condensation,thermal resistance,metallic roofs},
  language     = {eng},
  number       = {2},
  pages        = {178--191},
  title        = {Performances of highly insulated compact zinc roofs under a humid-moderate climate, part I: hygrothermal behavior},
  url          = {http://dx.doi.org/10.1177/1744259110370849},
  volume       = {34},
  year         = {2010},
}

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