发明授权
US3694306A Fire-resistant asbestos vapor barrier system 失效
防火ASBESTOS VAPOR BARRIER系统

Fire-resistant asbestos vapor barrier system
摘要:
A LAYER OF ASPHALT IMPREGNATED ASBESTOS FELT IS ADHERED TO A METAL ROOF DECK BY NONCUMBUSTIBLE ADHESIVE AND A LAYER OF NONCOMBUSTIBLE INSULATING BOARDS IS ADHERED TO THE ASBESTOS FELT BY MOPPING ASPHALT. A CONVENTIONAL BUILT-UP ROOF CAN BE INSTALLED OVER THE INSULATING BOARDS.
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