Toilet & Bathroom Waterproofing
Wet areas leak when the membrane stops short of the wall upturn, when the pipe collar is left exposed, or when the floor trap is set proud of the screed. We treat the wet area as one continuous tanked box — floor, perimeter wall upturn, pipe penetrations and floor trap — then verify with a ponding test before tiling resumes.
Common defects we treat
- Damp patch on ceiling below toilet
- Stained or peeling skirting on adjacent bedroom wall
- Loose, hollow or cracked floor tiles in the wet area
- Mould or efflorescence around floor trap and pipe penetrations
- Damaged timber, vinyl or laminate flooring in the room next door
Method on site
Diagnosis and scope confirmation
Moisture mapping, identification of source — failed membrane, cracked screed, pipe leak, floor trap defect, grout failure or lateral seepage — and confirmation of the hack-out boundary before any tile is broken.
Substrate preparation
Hack-off of finishes back to sound screed or slab, removal of dust and laitance, repair of cracks and honeycombing, installation of bond-breaker tape at slab-to-wall junction and around floor trap.
Membrane application
Two coats of membrane applied at right angles. Continuous return up perimeter walls (minimum 150 mm at general wall, full height at shower wall), full encapsulation of pipe collars and floor trap upstands.
Curing and ponding test
Membrane cured per data sheet. 24-hour water ponding test on floor with marked water level. Test result photographed and signed before screed protection layer is laid.
Screed protection and tiling
Screed protection layer poured over cured membrane to protect against mechanical damage during tiling. Tile setting proceeds only after the protection screed is firm.
Materials we use
- Cementitious polymer-modified membranes for floors and walls
- Acrylic / liquid-applied membranes for screeded substrates
- Bitumen-rubber or PU systems for selected substrates
- Pipe collar sleeves and bond breaker tape at movement joints
Deliverables to the client
- Photo record of substrate, membrane and ponding test
- Method statement aligned with SS 637 and BCA wet-area guidance
- Defect-rectification report when remedial scope is involved
- Maintenance and re-grouting note for the building owner