5. Water vapour diffusion factors
The factors that allow water vapour to diffuse through a wall are :
temperature differential ;
the degree of humidity (or relative humidity, or partial pressure) is different on each side of the wall.
5.1 Temperature
Calculations of diffusion through a wall are always carried out assuming a permanent hygrothermal regime on both sides of the wall.
The lower the outside temperature, the greater the risk of condensation.
When condensation occurs in the mass (e.g. at the interface between a concrete wall and its interior plaster), the moisture is deposited in a specific plane, the temperature of which is important to know....
The Ultimate Scientific and Technical Reference
This article is included in
Pathologies and building rehabilitation
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Water vapour diffusion factors
Water vapor diffusion
