Water vapor

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Abstract
Vapor diffusion is a relatively slow process. A good continuous vapor barrier can reduce the rate of diffusion to a very low level. For this reason, CRCA spec manual recommends the use of an adequate vapor barrier for all roofing systems.

Date
2/1970

Author(s)
Canadian Roofing Contractors Assn

Page(s)
2

Source
Canadian Roofing Contractors Assn

Keyword(s)
water vapor; vapor flow; CRCA; tech bulletin; permeance; vapor diffusion; vapor barrier

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