Substrate
The base must be suitable, stable and prepared for the nominated system.
What the job involves
Waterproofing must manage floors, walls, corners, penetrations, wastes, thresholds and transitions as a system. Tiles and grout are visible finishes, not the sole water-control layer.
Decisions that shape the scope
Falls and wastes
Water should reach the intended waste without persistent ponding.
Junctions
Corners, hobs, screens, doors and penetrations need compatible detailing.
Records
Ask who performs the work and what documentation or warranty is supplied.
Local planning point
What to check in this market
WA guidance states that wet areas must prevent water penetration into concealed spaces and adjoining elements. Licensed plumbing requirements apply to most plumbing alterations.
Useful details for a quote request
- Proposed shower type
- Existing damage or leaks
- Substrate and floor structure
- Penetrations and niches
- Installer and documentation
Compare like with like
Ask each responding provider to put the proposed scope, assumptions, exclusions and responsibilities in writing. A lower figure is not a saving if it omits preparation, access, disposal, approvals or completion work that another quote includes.