In addition to thickness, it is necessary to pay attention to the quality of wood. The quality of wood determines the type of sawing, the number of knots and resin pockets, the percentage of crumpledness, the presence of non -through cracks and blue. The most expensive, but at the same time high -quality rocks for the production of hollow boards are oak and larch. For savings, you can also use pine boards that are perfect for any interior. If you buy boards to the bathroom, then take only from larch, since this breed is least exposed to moisture.