| 摘要 |
<p>A roofing lath, which, in use, supports roof tiles or slates has in its underside 3 a series of transverse openings 1 which allow the cross-flow of ventilating air and/or the drainage of water between the tiles or slates supported by the lath and a waterproofing sheet of felt or plastics material through which the lath is fixed by nails or other fastenings. <IMAGE></p> |
