Waterproofing bathrooms

Old floors and cement sheeting may require a vapour barrier preparation

Prior to waterproofing the bathroom, some floors may require a vapour barrier to be installed. The vapour barrier to stop moisture from below lifting the waterproofing membrane.

Two part water based epoxy products are ideal for this purpose.

Waterproofing Bathrooms: Two part water based epoxy products are ideal for this purpose. Waterproofing Bathrooms: Two part water based epoxy products are ideal for this purpose.

Materials for the job

  • Poly urethane for corking
  • Poly cloth reinforcing fabric
  • Fibreflex waterproofing membrane
    • Waterproofing Bathrooms: Poly urethane for corkingWaterproofing Bathrooms: Poly cloth reinforcing fabricWaterproofing Bathrooms: Fibreflex waterproofing membrane

Cut in joints

Waterproofing Bathrooms: Cork joints with poly urethane, apply reinforcing fabric.
  • Cork joints with poly urethane
  • apply reinforcing fabric
Waterproofing Bathrooms: 1. Apply Fibreflex to surface and lay Polycloth into the corners, smoothed into the wet surface.

1. Apply Fibreflex to surface and lay Polycloth into the corners, smoothed into the wet surface.

Waterproofing Bathrooms: 2. Apply a coat of Fibreflex over the surface of the Polycloth ensuring the coaring penetrates the fibres of the Polycloth.

2. Apply a coat of Fibreflex over the surface of the Polycloth ensuring the coaring penetrates the fibres of the Polycloth.

Waterproofing Bathrooms: 3. Repeat the process for the vertical corners.

3. Repeat the process for the vertical corners.

Waterproofing Bathrooms: 4. Apply a second coat of Fibreflex to the entire area.

4. Apply a second coat of Fibreflex to the entire area.

Membrane covering walls and floor

Waterproofing Bathrooms: Coat the entire shower area. Waterproofing Bathrooms: Coat the entire shower area. Waterproofing Bathrooms: Coat the entire shower area. Waterproofing Bathrooms: Two coats over walls and floor. Waterproofing Bathrooms: Two coats over walls and floor.

Coat the entire shower area. Two coats over walls and floor.

Reference diagrams from the standard

AS3740 - waterproofing of wet area within residential buildings.

Waterproofing Bathrooms: AS3740 - waterproofing of wet area within residential buildings - Shower Base Waterproofing Bathrooms: AS3740 - waterproofing of wet area within residential buildings - Bath Junction Waterproofing Bathrooms: AS3740 - waterproofing of wet area within residential buildings - Minimum Membrane coverage Waterproofing Bathrooms: AS3740 - waterproofing of wet area within residential buildings - Stepped down Shower Construction Waterproofing Bathrooms: AS3740 - waterproofing of wet area within residential buildings - Drainage termination Waterproofing Bathrooms: AS3740 - waterproofing of wet area within residential buildings - Hob construction Waterproofing Bathrooms: AS3740 - waterproofing of wet area within residential buildings - Hobless construction Waterproofing Bathrooms: AS3740 - waterproofing of wet area within residential buildings - Defective hob installation in sheet membranes Waterproofing Bathrooms: AS3740 - waterproofing of wet area within residential buildings - Defective step down shower using a liquid applied membrane Waterproofing Bathrooms: AS3740 - waterproofing of wet area within residential buildings - Defective hobless shower liquid applied membrane Waterproofing Bathrooms: AS3740 - waterproofing of wet area within residential buildings - Typical liquid applied membrane termination detail into drainage pipe where the membrane has been applied over the title screen