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北京屋面防水施工时防水层厚度是多少?
作者:管理员    发布于:2011-01-26 13:56:04    文字:【】【】【

北京屋面防水施工时防水层厚度是多少?可能有人觉得这个防水层越厚越好,越厚才能经得住风沙的侵蚀、雨水的冲刷,是这样的吗?其实不然,任何事情都要有个度,就像古话说的“物极必反”的道理一样。那么,屋面防水施工时的防水层多厚合适呢?

通常我们要在基面上涂刷两层的防水涂料,每层涂刷厚度不超过1mm,厚度要均匀,不可漏刷。前一次略微干固后才可进行后一次涂刷,前后垂直十字交叉涂刷,涂刷总厚度一般为1~2mm。另外,也有特殊情况可能要进行第三次涂刷,因为我国气候复杂多变,有些地区需要特殊对待。大家都知道聚合物水泥基防水涂料是靠在基面形成一层防水膜而达到阻遏水渗透进墙体的,这层防水膜就是我们所说的防水层,对防水层的厚度是有要求的,要达到一定的厚度才能起到很好的防水作用,但是不是越厚越好。之所以要控制在这样的厚度,是因为防水层太薄它就起不到良好的防水作用,太厚则加大防水层在热胀冷缩的物理变化下出现开裂,防水层不是越厚越好就是这个原因。

所以在进行北京屋面防水施工时,防水层的厚度就要遵循这个标准,但是因地区会有所差异的,这是由于环境不同造成的。施工时,要严格按照施工要求来进行,因为防水层是整个施工的关键。

 

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