(1) The top layer or layers of a roof covering specified or designed to protect the underlying roofing from direct exposure to the weather; (2) the wearing or top layer of a traffic-bearing waterproofing membrane.
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(1) The top layer or layers of a roof covering specified or designed to protect the underlying roofing from direct exposure to the weather; (2) the wearing or top layer of a traffic-bearing waterproofing membrane.
« Back to Glossary