Link to publicationCitation for published version (APA): Fredriksson, M., Wadsö, L., & Johansson, P. (2013). Methods for determination of duration of surface moisture and presence of water in gaps in wood joints. Wood Science and Technology, 47(5), 913-924. DOI: 10.1007/s00226-013-0549-4 General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal
ABSTRACTIf water stays on wood surfaces or is trapped in gaps, the wood is supplied with water during a long period of time and high local moisture contents are reached. This can lead to decay by rot fungi and it is therefore important to avoid such water traps in order to limit the decay rate. This paper presents two methods; one for determination of duration of surface moisture on wood surfaces and one for determination of duration of water trapped in gaps in wood joints. Both these methods are based on similar electrical conductance measurements as are commonly used to measure moisture content of wood. Both sensor types consist of insulating tubing, electrically conductive adhesive and copper wire. The sensors monitor the presence of moisture on the actual material surface and because of their small size they do not influence the amount and duration of moisture that stays on the surface or in the gap.2