| 摘要 |
<p>An external roofing surface comprised of foam and a cement coating that is Class A fire-resistant under the UL 790 standard, insect resistant, very strong and extremely lightweight is disclosed. The roofing surface is also easily shaped by a number of shaping techniques, which allows for a more aesthetically pleasing appearance and can be used to make a roofing system that interlocks and has channels for underside ventilation. A cement coating is applied to the roofing surface, imparting it with excellent water repellant properties and increasing its strength, durability, and aesthetic appeal. The roofing surface may also optionally be reinforced with various materials to increase the strength and durability. The roofing surface may optionally be coated with a second coating material or a sheathing material to impart a desired strength, durability and/or aesthetic look.</p> |
