Home Home Decor For Master Bath – To add a little interest to the plain walls, add some 1″ by 4″ boards to one wall. Adds a little architecture to the room…a coastal cottage feel, no? :) Just glue and nail gun the boards on the wall (easy), then paint everything (possibly a cool white, like Dunn Edwards, Swiss Coffee) to expand, lighten, and freshen-up a small, windowless space.