Swimming Pool Leakages

Swimming Pool Leakages

Accessibility
Positive side accessible
Application Method Summary

Internal: 2K cementitious with reinforced corners; detail penetrations. For new/external faces: pre‑applied HDPE. Use crystalline as supplementary negative‑side treatment. Perform 72‑hr fill test.

Leakage ID

LQ-POOL

Likely root causes
Plumbing penetrationFailed membranePoor detailingTile grout failure
Location
Swimming Pool
Next Steps

QC/Tests

Recommended Technology Tags
Cementitious 2KHDPECrystalline
Recommended technologies
Cementitious MembraneHDPE Membrane Waterproofing Crystalline Waterproofing (Integral Powder & Surface-Applied Slurry)
Reference Image
Related applications
05. Swimming Pools10.Water Retaining Structures
Segment
Wet Areas
Select
Top
Severity
High
Solution Type
Positive-side waterproofingCrack treatment
Specific Area / Component

Top Tech Picks
Injection GroutCementitious 2K

Summary

Swimming pool leakages demand watertightness under constant hydrostatic pressure and chemical exposure. Treat new or accessible externals from the positive side; for retrofits, deliver a robust internal (negative-side) system that is compatible with tiling.

Symptoms

  • Water loss and dampness on outer walls
  • Efflorescence behind tiles or along overflow channels
  • Leaks at inlets, outlets, lights, and other penetrations

Probable causes

  • Inadequate joint detailing and rigid coats over moving cracks
  • Poor pipe penetration treatment and tile bed delamination
  • Discontinuous terminations or unprotected laps on external membranes

Standard remedy overview

1) Positive side (new or accessible)

  • Pre-applied HDPE bonded membranes at raft and walls with protected laps
  • Proper terminations and mechanical protection

2) Internal negative-side system (retrofit or repair)

  • 2K cementitious membrane (potable-safe) to target DFT with reinforcement at corners
  • Detailed treatment at inlets/outlets, lights, sumps, and overflow channels
  • Crystalline slurry as a supplementary densifier where specified

Recommended technologies

  • 2K cementitious (potable-safe) for internal faces
  • HDPE pre-applied bonded membranes for positive-side builds
  • Crystalline slurry as supplementary negative-side treatment

Quick SOP

1) Cure concrete; grind/clean; form 20×20 mm fillets

2) Internal: 2K cementitious in two crosswise coats; reinforce corners and details

3) Positive side (if possible): pre-applied HDPE with protected laps and terminations

4) 72-hour fill test; rectify and re-test; proceed to tile with C2 adhesive and epoxy grout

Decision guide

  • New pools or accessible externals → positive-side HDPE
  • Retrofits with persistent damp behind tiles → internal 2K cementitious (potable-safe)
  • Cracks requiring load transfer → epoxy injection with surface membrane overlay

Acceptance criteria

72-hour fill test passed with no dampness on externals or behind tiles
Internal coating DFT and corner reinforcement verified
Penetrations and inlets/outlets detailed and inspected
If used, HDPE laps and terminations documented and protected
QA records compiled with photos and test logs

Video Masterclass

SpecX Masterclass: Swimming Pool Leakages — Coming soon

Disclaimer

Notes

Ensure chemical compatibility of internal coatings with pool chemistry; maintain flexible detailing at all penetrations.