Something that I've used to good effect is to actually paint the wood, as if it were to be painted in real life or white-washed. Then, I will dry-brush a dark brown on top of the white painted surface. Lightly on flat surfaces and more pronounced where edges meet or where wear would be excessive.
I know! I know! This violates the basic rule of dry-brushing where you're supposed to put lighter colors on top of darker ones, but if you have the texture there, then use it. Painted wood will wear off at the surface and edges and leave the house paint between the fibers. Structures that have this kind of wear look awful, and it would be especially handy for scenes near the water, where they typically paint wood to preserve it. Looks really dirty and nasty.
I used it for some of my Zombietown buildings. Works well.