| 摘要 |
A moulded concrete roofing tile has at least two projecting nibs on the underside of the tile which nibs are spaced apart along the length of the tile. The tile may therefore be hung on a batten from either nib. An edge portion of the tile is cut away to receive a portion of a second tile in a vertical row adjacent a vertical row occupied by the said tile and staggered with regard to the said tile. In this way a horizontal row of tiles may be hung on a single batten with adjacent tiles in the row being displaced vertically in relation to one another and a roof may be constructed with the tiles in adjacent rows staggered but using only the same number and spacing of battens as would be required for rows which are not so arranged. |
