| 摘要 |
An insulating and waterproofing structure for a generally horizontal roof includes an insulating layer of heat-resistant synthetic resin foam which is placed on the roof. The foam has at least a partially open-celled structure at an upper surface of the insulating layer. Molten tar is spread over the insulating layer to a thickness of only a few millimeters, and gravel is then spread over the tar layer. The tar is then heated sufficiently to penetrate and bond with the upper surface of the insulating layer and also to be drawn upwardly through the gravel layer by adhesive and capillary-type forces to form a bond with the gravel. The result is a subtantially unitary structure which insulates and waterproofs the roof while minimizing the tendency for the gravel to displace.
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