防水材料的选择对防水层质量和耐用年限有极大的的影响，正确选择、合理使用防水材料是屋面防水设计成败的关键之一，虽然目前柔性防水材料的种类繁多，性能各异，以前采用沥青卷材，耐穿刺性能差，低温柔性差，易老化，防水层耐用年限短。
The selection of waterproof materials has a great impact on the quality and durability of the waterproof layer. The correct selection and rational use of waterproof materials is one of the keys to the success or failure of roof waterproof design. Although there are many kinds of flexible waterproof materials with different properties, the asphalt coiled materials used in the past have poor puncture resistance, poor low-temperature flexibility, easy aging and short durability of the waterproof layer.
而PVC改性沥青卷材，具有耐老化，耐候性，延伸率大，使用寿命长。同时施工简单，造价低，便于维修，使用效果好。
PVC modified asphalt coiled material has aging resistance, weather resistance, large elongation and long service life. At the same time, it has the advantages of simple construction, low cost, easy maintenance and good use effect.
PVC防水卷材的性能要求为：拉伸强盖土网 防寒布 麻绳 油麻绳 麻刀 沥青麻绳 静压造型线 自动浇注机 铸铁拍门 钢制拍门 玻璃钢拍门度：纵向≥7．0MPa，横向1>7．0MPa．断裂伸长率：纵向≥150％，横向≥150％．拉力：纵向≥7O，横向≥6O，耐热度90℃，低温弯折性：一20℃，无裂纹。抗渗透性：O．2MPa，24小时不透水，抗穿孔性不透水。
The performance requirements of PVC waterproof coiled material are as follows: tensile strength: longitudinal ≥ 7.0Mpa, transverse 1 > 7.0Mpa. Elongation at break: longitudinal ≥ 150%, transverse ≥ 150%. Tensile force: longitudinal ≥ 7O, transverse ≥ 6O, heat resistance 90 ℃, low temperature bending: 20 ℃, no crack. Impermeability: o.2mpa, 24-hour impermeable, anti perforation impermeable.