When installing tile in a shower with a moisture membrane, what type of drain is necessary?

When installing tile in a shower that incorporates a moisture membrane, a drain with weep holes below the tile is essential to ensure proper drainage and moisture management. The primary function of weep holes is to allow any water that penetrates through the tile and grout to drain away, preventing water from accumulating beneath the tile surface.

A key consideration in shower design is the control of moisture. The moisture membrane acts as a barrier to prevent water from passing through the substrate and leading to structural damage or mold growth. However, some moisture can still reach the surface beneath the tile, especially in areas where water might pool. Without weep holes, any trapped moisture would lead to potential issues such as tile lift, mold development, and damage to the underlying structures.

This type of drain system creates a cross flow of air and water that helps to facilitate evaporation and drainage, which is crucial in maintaining a dry environment beneath the tile. Additionally, the weep holes help maintain the overall integrity of the shower system and contribute to its durability over time.