厕浴间等需做楼(地)面防水的房间,不论选用何种防水卷材,其中有一项,就是卷材在地面与墙体交接处至少应卷起300mm,且外粘粗砂,具体构造见图1。门口处要向外铺出300mm宽防水层。但在某项工程施工中却出现以下问题。1.卷材在泛水处根本没有卷起,见右图(a),或卷起高度不到300mm,见右图(b)。2.卷起高度虽达到要求,但外面没粘粗砂,在贴面砖时被工人从泛水根部裁掉,见右 Toilet room, etc. need to do building (ground) waterproof surface, regardless of the choice of waterproof membrane, one of which is that the membrane at the junction of the ground and the wall should be rolled at least 300mm, and sticky grit, specific The structure is shown in Figure 1. A 300mm wide waterproof layer should be laid out at the entrance. However, the following problems occur in the construction of a certain project. 1. The coil is not rolled up at the flooding point. See figure (a) in the right, or the height of the coil is less than 300mm. See figure (b) on the right. 2. Although the roll height is up to the required level, no coarse sand is sticking on the outside, and when the veneer bricks are cut by the workers from the root of the flooding, see the right