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 language | English |
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Pages (from-to) | 205 - 226 |
Number of pages | 22 |
Journal | Journal of Thermal Envelope and Building Science |
Volume | 28 |
Issue number | 3 |
DOIs | |
Publication status | Published - 2005 |
MoE publication type | A1 Journal article-refereed |