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本页汇总防水材料最常被问到的 14 个问题,每题给出判断依据与处理方式;需要现场确认时可直接拨打 020-66666666(24小时,广州11区免费上门检测,先报价后施工)。
只看单价不看每平方米成活用量、材料与基层不兼容、用大面材料代替节点附加层。三项都会导致看起来刷了防水却仍然渗漏。
卫生间选柔韧型丙烯酸或聚氨酯涂料;外露屋面选耐候卷材或耐候聚氨酯涂层;水池选耐水压的水泥基渗透结晶加聚合物砂浆。
大面积规则屋面用卷材,厚度均匀、效率高;节点多、造型复杂的屋面用涂料加胎体增强更贴合;长期暴晒的外露部位优先耐候型。
核对包装防伪码与检测报告、称重对比标称厚度、现场取样留存。低价渠道的工程尾料与过期卷材是主要风险。
按每平方米成活用量折算:涂料类通常1.5至2.0公斤每平方米,分两到三遍施工;卷材按搭接后的实际面积计。合同里要列明总用量与遍数。
水汽被封在涂膜下形成鼓包,几个月后整片起壳。潮湿基层必须选湿固化型材料或先做干燥处理,含水率控制在8%以内再施工。
单间卫生间2至3天,含闭水24小时;屋面按面积3至7天;多雨季节要额外预留干燥窗口,赶工期最容易牺牲遍数与养护时间。
核对品牌型号与检测报告、检查涂膜厚度与施工遍数、闭水24小时水位不降、留存开桶照片与批次号。四项对应四类常见偷工。
质保以合同约定(注浆类与卷材类分别约定)。外露卷材按耐候年限约定,涂料类按涂膜厚度与遍数约定,材料等级越低,可承诺的年限越短。
不要。保修期内由建设单位负责,擅自覆盖会失去保修资格。先报修并留痕,出保后再评估局部加强或整体翻新。
防水层整体完好、仅节点失效(管根、地漏、窗框、阴阳角),做附加层与密封即可。全屋翻新属于过度施工。
避开高湿时段、优先湿固化或水性体系、每遍间隔延长至表干不粘手、施工后24小时内避免淋水与踩踏。
差在耐候年限、断裂延伸率与低温柔性。便宜材料往往要更厚涂布才能达到同等效果,把用量折算进去,综合成本未必低。
多数不是材料问题,而是节点构造没做对:管根未做附加层、阴阳角未做圆弧、排水坡度不足。换材料不解决构造缺陷。
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