AAHR Planning Guide
Shower Waterproofing Guide
Understand why tile and grout are not the waterproofing system and what belongs behind a professionally built shower.
Discuss Your Project
The waterproof layer
- Continuous waterproof membrane
- Sealed seams and corners
- Protected valve and pipe penetrations
- Integrated drain connection
- Waterproof niches and benches
Critical transitions
- Shower floor to wall
- Curb or curbless entry
- Glass fastener locations
- Window or half-wall details
- Bathroom-floor connection
Questions to ask a contractor
- Which waterproof system is specified?
- How are penetrations sealed?
- Is the niche fully waterproofed?
- How is slope created?
- What workmanship warranty applies?
Frequently Asked Questions
Is grout waterproof?
No. Grout and tile are finish surfaces; a correctly detailed waterproof assembly belongs behind them.
Why does waterproofing matter if the shower looks good?
Water can cause hidden damage long before surface problems become obvious, so the unseen preparation is as important as the visible finish.