Shower curb height is determined by a balance of user accessibility and the volume of water the shower needs to contain. A height of 4 to 6 inches is standard; it acts as a dam to prevent water from escaping the shower. If the curb is too low, splash-out is a risk; if too high, it becomes a significant tripping hazard or an obstacle for those with limited mobility. Because this is a regulated part of the bathroom, you must consult your local building department before starting, as some regions have very specific mandates. Regardless of the height, construction and waterproofing are the true concerns. The curb is a high-stress area, prone to movement and constant wetting. It must be built as a solid, stable element and wrapped in a continuous, bonded waterproof membrane. This membrane should cover the top and both sides of the curb to prevent water from entering the structure, which is a common cause of rot. Using an engineered foam curb insert is often superior to a wood-framed curb because it is inherently waterproof and dimensionally stable, reducing the risk of failure over time.
Key considerations
- standard shower curb height
- shower curb requirements
- how high should a shower curb be
- Curb
- Framing
- Waterproofing