Document the complete selected system and keep products compatible.
Home system
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.
Related path
Continue with the right tools
These links connect this page to the next useful checks and decisions without repeating the full content.
Start from a symptomOrganize plausible causes, observations, urgency and the right professional.Open →Track water useCompare meter readings and flag unusual changes.Open →Review water resilienceConnect flooding, drainage and future events to building adaptations.Open →Score home resiliencePrioritize water, outages, fire, climate, health and records.Open →Plan site, drainage and utilitiesCoordinate access, water, sewer, wells, septic, grading and site constraints.Open →
Tools related to this issue
V16
Advanced diagnostics to cross-check
V16 connects water, soil, climate, safety, materials and seasonal use to existing projects.
V17
Specialized systems to cross-check
V17 completes gas, soil, water, fire, climate and structural interfaces.
V18
Specialized diagnostics to verify
V18 connects systems that become costly or regulated when a primary project triggers them.
V19
Edge systems to integrate into the project
V19 covers interfaces that become important when multiple home systems interact.
V26
Often-overlooked service interfaces
V26 connects systems that cross utility, plumbing, HVAC, envelope and metering boundaries.
V27
Project risks and overlooked interfaces
V27 connects payment, water, envelope, ventilation and jobsite details that often create costly surprises.
V28
Finish and service details to verify
V28 connects small details that become costly once finishes are closed.
V30
Shared, access and specialized interfaces
V30 connects projects where multiple systems, owners or rules meet.
V32
Post-disaster and legacy systems
V32 connects contamination, storm damage, legacy materials and recommissioning before rebuilding.
V47
V47 interfaces not to miss
These details are small on a drawing but can control water, structure or durability.