Shower Curb Width Guide
Shower curb design has gotten complicated with all the code requirements, accessibility concerns, and waterproofing methods flying around. As someone who has built shower curbs in every configuration, I learned everything there is to know about proper dimensions. Today, I will share it all with you.
Standard Dimensions
Probably should have led with this section, honestly—typical curb width ranges from 3 to 5 inches, with 4 inches being most common.
Factors Affecting Width
- Door type (hinged vs. sliding)
- Accessibility requirements
- Tile size for top surface
- Waterproofing membrane needs
Height Requirements
- Standard: 2-4 inches above shower floor
- ADA compliant: Maximum 1/2 inch (barrier-free preferred)
- Sloped for drainage toward shower
Construction Tips
- Use waterproof curb material or properly waterproof wood framing
- Slope top toward shower drain
- Ensure waterproof membrane wraps over curb
- Allow for tile thickness on all surfaces
