— Wooden window sills. For a wooden frame, a wooden window sill is also suggested. But you need to approach the choice of wood carefully. If you choose a pine tree as the most economical option, then you should not count on a long service life of the windowsill. Since the pine has a soft texture and easily scratches. For a longer window of the window, it is better to give preference to more solid breeds, such as larch, oak and beech.