The objective of this paper is to study the influence of several types of modification (acetylation, furfurylation, thermal modification) on coatings adhesion and to compare two methods of assessing the adhesion: the cross-cut test and the pull-off test both tested in dry and wet conditions. The study also investigates the effect of other parameters of the wood substrates on adhesion like the ring orientation, the density, the surface preparation and conventional preservatives treatments. It has been shown that the pull-off test is more sensitive than the cross-cut test and gives more information about the influence of the substrate. For both tests wet adhesion is lower than dry adhesion. Compared to the reference, there is no improvement in the dry adhesion due to the different modifications, treatments or variations of the substrates. For some coatings a decrease in dry adhesion is observed on furfurylated and thermally modified wood.

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