Good start, Rasmus. You might want to try wood textures that are more weathered in appearance, or have a more pronounced grain. There some nice wood textures to be found at http://www.accustudio.com/index.php?option=com_phocagallery&view=category&id=46:&Itemid=77 Also, wood roof shingles (standard SU texture) would better match the original.

Thanks mate!