The present invention relates to a waterproof material, wherein film
layers are set between non-
woven fabric layers, an
asphalt layer is set between the film
layers, and a net reinforcement layer is set within the
asphalt layer. The advantages of the present invention include: (1) film layers are formed by laminating it on the
compositing surfaces of the upper and lower non-
woven fabric layers, which overcomes the drawback of water leaking in the background art, prevents the leaking of
asphalt into the non-
woven fabric or out of the non-woven fabric during the
compositing process, so that the environmental
pollution during transportation and application is avoided; (2) a glass-
fiber netlike reinforcement layer is set within the asphalt layer, so that not only the tensile strength and
compressive strength of the asphalt layer, but also the tensile strength and tear strength of the roofing underlayment material are improved; (3) the thickness and number of film layers are set to ensure the temperature-resistance and
puncturing-resistance of film layers.