Moisture performance of an airtight, vapor-permeable building envelope in a cold climate

C.J. Simonson (Corresponding Author), Tuomo Ojanen, Mikael Salonvaara

Research output: Contribution to journalArticleScientificpeer-review

15 Citations (Scopus)

Abstract

Vapor-permeable building envelopes have received renewed interest because they can moderate indoor humidity levels and improve the drying of the envelope during summer condensation conditions. In this paper, the moisture performance of a vapor-permeable building envelope is presented with field measurements and numerical simulations. The results show that the diffusion resistance of the internal surface should be greater than that of the external surface (typically recommended ratio of 3: 1 or 5: 1), but that the vapor resistance of the vapor retarder can be significantly below that provided by polyethylene and still result in a safe structure, even in a cold climate.
Original languageEnglish
Pages (from-to)205 - 226
Number of pages22
JournalJournal of Thermal Envelope and Building Science
Volume28
Issue number3
DOIs
Publication statusPublished - 2005
MoE publication typeA1 Journal article-refereed

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Moisture
Vapors
Polyethylene
Polyethylenes
Condensation
Atmospheric humidity
Drying
Computer simulation

Cite this

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abstract = "Vapor-permeable building envelopes have received renewed interest because they can moderate indoor humidity levels and improve the drying of the envelope during summer condensation conditions. In this paper, the moisture performance of a vapor-permeable building envelope is presented with field measurements and numerical simulations. The results show that the diffusion resistance of the internal surface should be greater than that of the external surface (typically recommended ratio of 3: 1 or 5: 1), but that the vapor resistance of the vapor retarder can be significantly below that provided by polyethylene and still result in a safe structure, even in a cold climate.",
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Moisture performance of an airtight, vapor-permeable building envelope in a cold climate. / Simonson, C.J. (Corresponding Author); Ojanen, Tuomo; Salonvaara, Mikael.

In: Journal of Thermal Envelope and Building Science, Vol. 28, No. 3, 2005, p. 205 - 226.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Ojanen, Tuomo

AU - Salonvaara, Mikael

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N2 - Vapor-permeable building envelopes have received renewed interest because they can moderate indoor humidity levels and improve the drying of the envelope during summer condensation conditions. In this paper, the moisture performance of a vapor-permeable building envelope is presented with field measurements and numerical simulations. The results show that the diffusion resistance of the internal surface should be greater than that of the external surface (typically recommended ratio of 3: 1 or 5: 1), but that the vapor resistance of the vapor retarder can be significantly below that provided by polyethylene and still result in a safe structure, even in a cold climate.

AB - Vapor-permeable building envelopes have received renewed interest because they can moderate indoor humidity levels and improve the drying of the envelope during summer condensation conditions. In this paper, the moisture performance of a vapor-permeable building envelope is presented with field measurements and numerical simulations. The results show that the diffusion resistance of the internal surface should be greater than that of the external surface (typically recommended ratio of 3: 1 or 5: 1), but that the vapor resistance of the vapor retarder can be significantly below that provided by polyethylene and still result in a safe structure, even in a cold climate.

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