| 摘要 |
A roof tile is constructed to receive earth or an inflated clay and earth mixture, may be used as the basic shape. For this purpose the upper side on the roof tile is bounded by upwardly projecting lateral walls along its two long sides and either the tile also has an overlapping element to bridge and connect adjacent walls of adjacent laid roof tiles or a separate element (e.g. a U shaped rail is clipped over adjacent walls. Means (such as elevated portions 7, 7' or a transverse wall 10) are provided at the foot part of the roof tile to prevent earth from being washed away and to form a type of retention step. <IMAGE> |
