Waterproofing FAQs Canberra

No. Tiles and grout form the visible finish. The waterproofing system sits beneath those finishes and relies on appropriate preparation, membrane application and detailing at junctions, penetrations and drainage interfaces.

The waterproofing system relies on the surface beneath it. Existing moisture, movement, cracking, contamination and unsuitable surfaces can affect how the waterproofing system is prepared and applied.

Corners, wall-floor junctions, pipes, drains, thresholds and other changes interrupt otherwise continuous surfaces. These interfaces need deliberate waterproofing detail so the system remains connected through the area.

No. Bathrooms, showers, balconies, below-ground structures and retaining walls experience different water exposure, drainage conditions, substrates and interfaces. The waterproofing approach should respond to the actual application.

Bathroom waterproofing is completed after the substrate and required detailing have been prepared and before the waterproofed areas are concealed by subsequent finishes.

Relevant details can include corners, wall-to-floor junctions, plumbing penetrations, niches, drains, thresholds and other changes within the wet area.

The drain is one of the points where the waterproofed shower area interfaces with the drainage system, so the surrounding waterproofing detail forms part of the overall wet-area assembly.

The appropriate remedial approach depends on the existing waterproofing system, substrate, finishes, condition of the wet area and likely water pathway. The cause should be assessed before determining the repair scope.

Falls influence how water moves across the finished balcony toward drainage points. Ponding or water repeatedly reaching vulnerable interfaces can affect the overall waterproofing condition.

Yes. Thresholds, wall junctions, perimeter details and other transitions interrupt the waterproofed surface and need to be considered as part of the overall balcony assembly.

Balconies are exposed to weather and need to move collected water toward drainage points. The relationship between falls, outlets and waterproofing interfaces can affect how much water reaches vulnerable areas.

The appropriate remedial scope depends on the existing membrane, substrate, finishes, drainage, thresholds and likely water pathway. Investigation should occur before deciding how localised or extensive the repair needs to be.

Below-ground construction can be exposed to moisture in the surrounding soil. Water may reach walls, floors, joints, penetrations or other interfaces depending on the site and construction.

Potential weak points can include wall-floor junctions, construction joints, penetrations, cracks and interfaces with drainage or other building components.

Drainage and waterproofing often need to be considered together because managing water around below-ground construction can reduce the amount of moisture reaching the building envelope.

Retaining walls can remain in contact with surrounding ground and moisture. The waterproofing membrane, protection layer, wall-footing junction and drainage arrangement need to be considered together as part of the wall system.

Often there are remedial options, but the appropriate scope depends on the existing waterproofing, substrate, finishes, access and likely source of moisture.

Not necessarily. The repair extent depends on where the failure is, whether sound existing waterproofing can be retained and whether a reliable connection can be made between new and existing work.

A patch can fail when it does not address the actual water entry point, when surrounding substrate or membrane is also affected, or when the repair does not connect reliably into the remaining waterproofing system.

Not always. Moisture can travel behind finishes, along joints or through adjoining construction before it appears at the visible damage point.