The reason of mildew on the wall is nothing more than damp. One is the damp caused by season, which has little to do with putty powder. One is that the base of the wall is not well prepared and the base surface is not well treated, which may be due to putty powder.

一、因为墙体保温没有做好而导致的墙体发霉：应先检查墙体是否做过保温处理。用检查锤敲击墙面，如果声音空洞，则说明墙体有保温层，如果声音沉闷，则说明墙体没有做保温层。

1、 Because the wall insulation is not good and cause wall mildew: should first check whether the wall has done insulation treatment. Knock the wall with the inspection hammer. If the sound is hollow, it means that the wall has insulation layer. If the sound is dull, it means that the wall has no insulation layer.

若存在保温层则需检查建筑外墙是否存在裂缝，如果没有裂缝，说明保温材料不行，要进行更换，这是根治之法。还有墙体没做防水导致墙体渗水引起墙壁发霉。

If there is a thermal insulation layer, it is necessary to check whether there are cracks on the external wall of the building. If there are no cracks, it means that the thermal insulation material is not good and it needs to be replaced. This is a radical cure. There are walls that are not waterproof, causing water seepage and moldy walls.

二、因为季节原因造成的发霉：更好不要马上修补。因为墙体内的水分正在逐渐挥发，属于装饰材料的正常物理变化。如果未等水分完全挥发完就又刷上新的漆面，水分仍然会继续挥发，并且还会从其他地方出来，墙体就有可能再次发霉。

2、 Mildew due to seasonal reasons: it's best not to repair it immediately. Because the water in the wall is gradually volatilizing, it belongs to the normal physical change of decorative materials. If the water is not completely volatilized and then painted with new paint, the water will continue to volatilize, and will come out from other places, the wall may be moldy again.

以上内容由济南腻子粉的厂家整理的发布 ，希望可以帮助到大家，更多精彩内容请关注：http://www.jnfhjc.com

The above contents are sorted out and released by the manufacturers of Jinan putty powder. I hope it can help you. For more wonderful contents, please pay attention to: http://www.jnfhjc.com