住宅窗户防水怎么做,窗边渗水返工经验

住宅项目里窗边渗水看着是小问题,真返工起来很麻烦。我以前遇到过一栋新房,窗户装完以后外墙也封了,第一次大雨后内侧窗台边缘发潮,拆开才发现不是窗户本身坏,是粗洞口和防水层处理得太随意。 现在做窗户我会先看 rough opening 有没有找平,底部有没有做 sill pan 或者斜坡排水,house wrap、flashing tape、drip cap 的搭接方向是不是顺水走。很多师傅习惯最后打一圈胶,胶只能做辅助,不能替代搭接。胶老化以后,水还是会从上口或侧边慢慢钻进去。 还有一点容易被忽略:窗户下口别让水困在里面。底部如果完全封死,进了一点水也排不出去,时间久了木料和保温棉都会受影响。窗户防水不是装完好看就算过,关键是让水有路走。

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