| 摘要 |
<p>An improved composite panel (10) has a synthetic material, especially foam, layer (12) having elongate, preferably inclined, grooves (32,34) running adjacent its longitudinal edges (16,18). A cementitious layer (14) is formed atop of the synthetic material layer (12) with integral projections extending into the grooves (32,34). The cementitious material cooperates with the grooves (32,34) to provide a barrier to moisture ingress between the layers, an improved mechanical lock between layers, and a rigidifying structure strengthening at least the panel edges.</p> |
