Water vapor transmission and moisture accumulation in cellular plastics

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ConferencePolyurethanes 88 : Proc. SPI 31st Annual Technical/ Marketing Conference: 18 October 1988, Philadelphia, Pennsylvania, USA
Pages316318; # of pages: 3
Subjectexpanded plastics; thermal insulation; permeability; sprayed-in-place polyurethanes; extruded polystyrene; phenolic foam insulations; temperature gradient; water vapor permeance; temperature dependence; moisture accumulation - ottawa winter conditions; Cellular plastics (plastic foam); Foam; Moisture performance; plastique dilaté; isolation thermique; permeabilité
AbstractThe moisture accumulation in a number of sprayed-in-place polyurethane (PUR), extruded polystyrene (XEPS), and phenolic foam insulations under a temperature gradient has been measured. The temperature dependence of the water vapor permeance of the XEPSs and the phenolics has also been determined. Field measurements on the accumulation of moisture in sprayed-in-place PUR in a wood frame wall of a test building exposed to an Ottawa winter has shown no significant moisture accumulated in the foam when the sheathing on the cold side of the insulation was permeable to the transmitted moisture.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number29771
NPARC number20378486
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Record identifiercecc7c84-ebfb-4721-9bf5-9600fee0e19d
Record created2012-07-24
Record modified2016-05-09
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