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本页汇总窗台渗水最常被问到的 15 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)。
外侧密封胶老化开裂、窗框与墙体之间未做发泡填充、窗台外沿没有流水坡甚至倒坡。三处同时存在时,暴雨必渗。
分段做淋水试验:只淋窗框范围就渗,是框边收口问题;整面淋水才渗,是外墙毛细孔或裂缝;两者同时渗,要分别处理,不能一起打胶了事。
不能。室内打胶只是把水封在墙体内,水会向其他部位转移。必须从外侧开槽重打耐候胶,并把窗台外沿做出流水坡。
外侧清基、裂缝封闭、重做密封与排水坡、室内干燥除霉。顶板积水严重的,先做局部排水板再谈防水。
外露部位用中性硅酮耐候胶、缝隙用聚氨酯发泡填充、坡面用聚合物水泥砂浆。禁用酸性胶和普通玻璃胶,半年就会失效。
单窗收口重做一般200至600元,视高度与是否需要高空作业;整面窗墙按平方米计,含淋水试验。
单窗1天可完成,胶体固化24小时后做淋水复验;整面处理2至3天,雨天不施工。
外侧淋水30分钟(水压接近中雨)、室内无新渗痕、胶缝连续无断点、窗台外沿泼水不积水。四项同时满足才算过。
质保以合同约定(密封胶类通常按胶体寿命约定年限)。合同写清是否含高空作业、是否含复打胶,避免一年后重复收费。
外墙与窗框属建筑外维护结构,保修期内由建设单位负责;出保后由业主协商,物业负责协调与到场见证。
胶缝局部开裂但基层完好、淋水仅轻微渗,可清缝补胶。若胶体整体老化、窗台倒坡或框边空腔,就必须重做收口。
检查外侧胶缝是否开裂脱粘、清理推拉窗轨道排水孔、确认窗台外沿坡度、发现室内起皮尽早处理。四项检查做完,多数渗漏可避免。
只在室内侧补、没做外侧流水坡、胶打在潮湿基层上、窗框固定后未做发泡填充。四项中任一未做,都会复发。
差别在是否需高空作业、是否要拆窗框重做收口、是否含外墙整面处理。只报最低价的,往往只做室内打胶。
渗水有明确水源与雨后可复现的痕迹,通常从框边缝隙渗出;冷凝水多在温差大的早晚出现在玻璃与型材表面,不沿缝隙流。
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