There are no restrictions on types of finishing. It applies both to the decoration of exterior facades and interior works. While finishing facades, you can use absolutely any materials: from vinyl siding to decorative plaster and bricks. The roof may be covered either with metal shingles or with any roofing material, including soft or natural tiles and slates. There are also no restrictions inside, ranging from painted walls, wallpaper, or lining to ceramic tiles in the bathroom.