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Madison, WI 53726-2398
Phone: (608) 231-9200
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Title: Modelling mould growth on coated modified and unmodified wood substrates exposed outdoors

Source: Wood Sci Technol (2010) 44:315-333; 2010

Author(s)Gobakken, Lone Ross; Lebow, Patricia K.

Publication Year: 2011  View PDF »

Category: Journal Articles

Abstract: Mould growth on coated wood is today a genuine challenge for house owners. Environmentally sound wooden facades with long service lives and acceptable appearance are desired. The objective in this study was to investigate the accumulated mould growth on 13 different wood substrates with 3 surface coating systems by identifying the factors that contribute to the variation and to predict future performance. A generalized linear mixed model was fit to the data with the analysis showing that coating and exposure time both had highly significant influences on mould growth. Further, wood substrate was significant, but comparatively less than coating and exposure time. A smaller coefficient for mould coverage in the beginning of the exposure period gave the panels with one of the coating systems, BAP, a delay in mould growth, and the extrapolated values for years 6-12 indicate a longer aesthetic service life than panels with the two other coating systems. Coated heartwood as wood type was less susceptible to mould growth than coated mixed wood and coated sapwood. Acetylated pine as wood substrate and aspen as wood species had lower resistance to mould growth than the other wood substrates and wood species, respectively.

Keywords: surface coating, modified wood, mould growth, field test, generalized linear mixed model, Aspen, Larch, Norway spruce, Scots pine

File size: 296 kb(s)

Date posted: 01/04/2012
Current FPL Scientist associated with this product
Lebow, Patricia K.
Mathematical Statistician

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