Sharp front analysis of moisture buffering

Christopher Hall, Gloria J. Lo, Andrea Hamilton

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)
21 Downloads (Pure)


Moisture buffering describes the use of materials with high water-vapour sorption capacity to provide humidity control
in interior spaces. Established models of the moisture dynamics of buffering are derived from conventional Fickian vapour-diffusion equations. We describe an alternative analysis using a Sharp-Front formulation. This yields a similar expression for the moisture effusivity, several consistent scalings and a new definition of the moisture penetration depth. Features of the model are compared with some published experimental data. A new sorption buffer index is a measurable experimental property that describes the water-vapour buffer strength of the material.
Original languageEnglish
Pages (from-to)78-81
Number of pages4
JournalRILEM Technical Letters
Publication statusPublished - 22 Jul 2021


  • moisture buffering
  • moisture emissivity
  • penetration depth
  • sharp-front model
  • sorption
  • vapour permeability
  • sorption buffer index


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