Installation steps: When laying tiles, the waterproof barrier should be embedded beneath the floor tiles. Some sellers tout "skirted" water barriers, but this is actually misleading to consumers; the "skirt" is merely a lip rising a few millimeters above the barrier's outer edge. In reality, such barriers are designed for the stone bases of glass shower enclosures, where the glass sits in the center of the barrier-away from the skirt-to prevent water from seeping past the glass and over the barrier. For installations using a shower curtain, the barrier's height should be measured so that the curtain hangs naturally, ending about three centimeters above the barrier; this ensures optimal performance and prevents water from splashing outside. The main drawback of the "skirted" design is that, without the weight of a glass enclosure pressing down on it, the silicone sealant underneath can loosen over time, as there is little downward pressure to keep the barrier firmly in place.
Additional note: Some people insist on installing very tall water barriers, but this is unnecessary. A height of 1.8 centimeters is sufficient. If the water level reaches 1.8 centimeters without draining, the issue lies with the floor drain, not the water barrier.
