Remove tiles locally. Provide 20×20 mm coves. Apply 2K cementitious (≥2 mm) with geotextile at corners. PU detailing at pipe collars. Epoxy re‑grout and 72‑hr pond test.
LQ-BATHROOM
Remove tiles locally → form 20×20 mm coves → apply 2K cementitious ≥2 mm with corner reinforcement → PU detail pipe sleeves and drains → re-tile with epoxy grout → 72‑hr pond test.
DFT checks to reach ≥2 mm. 72‑hr pond test pass with no damp ring. Photolog of penetrations treated. Functional wet test 24–48 hr for kitchens.
Consolidated Wet Areas: Bathrooms, Kitchens, Balconies, Refuge slabs. Includes junctions, drains, pipe sleeves, sunken slabs; use this single record for all wet-area leakages.
Summary
Wet area leakages concentrate at sunken slabs, wall–floor junctions, drains, and pipe sleeves. The goal is a continuous, tile‑compatible barrier with robust detailing and pond testing. Prefer positive‑side waterproofing before finishes; use negative‑side only for interim containment.
Symptoms
- Damp ceiling below bathrooms or kitchens
- Wet corners and around drains
- Efflorescence along grout lines and skirtings
Probable causes
- Missing fillet (watta) at wall–floor junctions
- Poor detailing at pipe sleeves and traps
- Inadequate membrane DFT or curing; no pond test
- Debonded tile bed or failed grout
Standard remedy overview
1) Positive‑side rebuild prior to tiling
- Substrate repairs and 20×20 mm fillets at all junctions
- 2K cementitious membrane to target DFT with corner reinforcement
- PU detailing at pipe collars and drains; chase terminations where needed
- Screed, tile with C2 adhesive, and epoxy grout
2) Localized detailing and re‑grouting (when full rebuild isn’t feasible)
- Reinforce penetrations and vulnerable junctions with bandaging
- Re‑grout with epoxy; monitor performance and schedule full rebuild
Recommended technologies
- 2K elastomeric cementitious membrane (≥ 2 mm)
- PU liquid membrane for collars and complex junctions
- SBR latex primers/additives as specified; epoxy grout
Quick SOP
1) Grind and clean; repair honeycombs; form 20×20 mm fillets
2) Apply 2 coats of 2K cementitious crosswise; geotextile at corners
3) Detail pipe collars with epoxy primer + PU bandaging
4) 72‑hour pond test; rectify if needed; screed and tile; epoxy grout
5) Always protect the membrane from point loads and sharp edges in the screed; maintain slopes to drains.
Decision guide
- Sunken slab rebuilds and long‑term reliability → full positive‑side system
- Heavy penetration density (multiple pipes, traps) → additional PU bandaging
- Minor dampness with intact finishes → localized detailing and epoxy re‑grout (temporary)
Acceptance criteria
Video Masterclass
Masterclass: Wet Areas — Coming soon
Disclaimer
Conix is an industry initiative & a neutral resource, compiled from industry references and best practices. It is not brand-specific. Always cross-check with project requirements and local codes before finalizing specifications.