Moisture characteristics of plywood. Part II - Moisture Buffering Capacity of Plywood Interior Sheathing

Olalekan Osanyintola, Conrad Iskra, Carey Simonson, Tuomo Ojanen, Jarkko Ahonen

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    Abstract

    The purpose of this paper is to investigate the moisture characteristics of spruce plywood used as an internal covering board, especially the ability of plywood to store and release moisture as the indoor relative humidity changes. In this paper, the moisture buffering capacity is measured by recording the change in mass of a test specimen when the air relative humidity is changed between 33% RH and 75% RH. The aim is to represent diurnal cycles in indoor humidity with 33% RH maintained for 16 hours and 75% RH maintained for 8 hours. Measurements are taken using three different apparatuses, which provide different convective transfer coefficients between the air and the plywood and the results are compared to a numerical model. The convection coefficients investigated range from natural convection in sealed, small jars to fully developed turbulent airflow over the plywood. The results show that the buffering capacity of plywood depends on the thickness of the plywood as well as the surface film coefficient.
    Original languageEnglish
    Title of host publicationProceedings of the 7th Symposium on Building Physics in the Nordic Countries
    Pages124-131
    Volume1
    Publication statusPublished - 2005
    MoE publication typeA4 Article in a conference publication
    Event7th Symposium on Building Physics in the Nordic Countries - Reykjavik, Iceland
    Duration: 13 Jun 200515 Jun 2005
    Conference number: 7

    Conference

    Conference7th Symposium on Building Physics in the Nordic Countries
    CountryIceland
    CityReykjavik
    Period13/06/0515/06/05

    Keywords

    • moisture buffering capacity
    • spruce plywood
    • convective transfer coefficients
    • sheathing

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  • Cite this

    Osanyintola, O., Iskra, C., Simonson, C., Ojanen, T., & Ahonen, J. (2005). Moisture characteristics of plywood. Part II - Moisture Buffering Capacity of Plywood Interior Sheathing. In Proceedings of the 7th Symposium on Building Physics in the Nordic Countries (Vol. 1, pp. 124-131)