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本页汇总防水施工工艺最常被问到的 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)。
基层处理、节点附加层、大面防水、闭水或淋水验收、保护层。少任何一道,问题都会在一年内暴露。
无浮灰油污、无空鼓起砂、阴阳角做圆弧、含水率低于8%。用手搓不起砂、泼水不迅速吸收,即可初判。
管根、地漏、阴阳角、变形缝是应力集中区,大面防水在这些位置最容易被拉裂。附加层宽度一般不小于200毫米。
涂料类两到三遍,总厚度不低于1.5毫米(水池与屋面建议2毫米)。每遍表干不粘手再刷下一遍,两遍方向交叉。
防水层完全固化后做,蓄水不低于2厘米,持续24至48小时。水位下降超过2毫米或楼下出现渗痕即判不合格。
同一材料,两遍与三遍、有无附加层、有无闭水,成本差可达三成。低价单通常省掉附加层与闭水环节。
卫生间3至4天(含闭水24小时与养护);屋面按面积3至7天;涉及拆改恢复的另计。
每遍施工照片、附加层位置图、闭水水位记录、材料开桶与批次照片。这些记录同时是质保凭证。
质保以合同约定(注浆类与卷材类分别约定)。遍数与厚度决定涂膜寿命,工艺缩水时承诺年限应相应下调。
现场看三件事:有没有做附加层、闭水有没有满24小时、材料是否当面开桶。三项都能当场核实。
仅节点失效、防水层完好的,可只做节点加强加表面封闭,不必全屋重做。
缩短单次施工面积、避开降雨窗口、每遍延长干燥时间、施工面做临时遮蔽。强行赶工是雨季返工的主因。
三个月内空鼓起壳、闭水时水位缓降、管根周边先渗、涂层可用手撕起。出现任一,说明基层处理或遍数有问题。
不建议。旧层起壳或含水时,新层会被顶起。正确做法是铲除至基层、修补找平后再施工。
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