Document the complete selected system and keep products compatible.
Shower, bathroom and waterproofing
Plan membrane, slope, drain, niches, benches, transitions and ventilation before tile and finishes.
Checked: 2026-08-21
Curbless shower, niche, bench, window or drain changes multiply details to verify.
Existing leak, soft wood, mould behind finishes or structural floor changes: open and correct before rebuilding.
Useful tools and measurements
- Level and straightedge
- Tools for selected membrane system
- Drain plug/test where allowed by system
- Hygrometer / moisture meter for diagnosis
Having a tool does not make regulated work DIY.
What the professional checks
- Check substrate structure and slope
- Detail membrane, drain and transitions
- Perform system/code tests before finishes
Sources and limits
Requirements vary with the building, jurisdiction, code edition and exact scope. This triage does not replace plans, calculations, permits, inspections or required professionals.
Continue with the right tools
These links connect this page to the next useful checks and decisions without repeating the full content.
Tools related to this issue
Explore: Advanced diagnostics to cross-check
Advanced diagnostics to cross-check
This section connects water, soil, climate, safety, materials and seasonal use to existing projects.
Explore: Specialized systems to cross-check
Specialized systems to cross-check
This section completes gas, soil, water, fire, climate and structural interfaces.
Explore: Specialized diagnostics to verify
Specialized diagnostics to verify
This section connects systems that become costly or regulated when a primary project triggers them.
Explore: Edge systems to integrate into the project
Edge systems to integrate into the project
This section covers interfaces that become important when multiple home systems interact.
Explore: Often-overlooked service interfaces
Often-overlooked service interfaces
This section connects systems that cross utility, plumbing, HVAC, envelope and metering boundaries.
Explore: Project risks and overlooked interfaces
Project risks and overlooked interfaces
This section connects payment, water, envelope, ventilation and jobsite details that often create costly surprises.
Explore: Finish and service details to verify
Finish and service details to verify
This section connects small details that become costly once finishes are closed.
Explore: Shared, access and specialized interfaces
Shared, access and specialized interfaces
This section connects projects where multiple systems, owners or rules meet.
Explore: Post-disaster and legacy systems
Post-disaster and legacy systems
This section connects contamination, storm damage, legacy materials and recommissioning before rebuilding.
Explore: V47 interfaces not to miss
V47 interfaces not to miss
These details are small on a drawing but can control water, structure or durability.