Linings for shower receptors are typically made of what material?

Shower receptor linings are traditionally constructed from three layers of 15-lb asphalt saturated felt, a method that has been effective in providing a durable and moisture-resistant barrier. This material is highly regarded in the industry for its waterproofing capabilities and its ability to protect the underlying structure from damage caused by prolonged exposure to water. The multiple layers enhance the performance by preventing moisture penetration and allowing some flexibility, which is essential in wet environments like shower areas.

While other materials, such as plastic sheeting or fiberglass panels, can be used in various applications, they do not offer the same level of traditional reliability and effectiveness as the asphalt saturated felt, especially in conjunction with mortar beds. Tile underlayment, while important for tiling applications, serves a different purpose, mainly focused on providing a smooth, level surface for tile installation rather than acting as a waterproof barrier. Therefore, the choice of three layers of 15-lb asphalt saturated felt aligns well with established best practices in bathroom construction, making it a preferred option for shower receptor linings.