Residential waterproofing is not cosmetic — it is a structural protection system.
Bathrooms, laundries, balconies, and basements are classified as wet areas because they are regularly exposed to moisture.

Without a compliant waterproof membrane:

1) Water penetrates behind tiles and into substrates

2) Timber framing begins to rot

3) Steel reinforcement corrodes

4) Mould develops inside walls

5) Internal ceilings and adjacent rooms suffer damage

Most tile leaks occur beneath the surface, meaning damage often goes unnoticed until major repairs are required.
Proper waterproofing prevents structural deterioration, health risks, and costly rectification works.

In Australia, internal wet area waterproofing must comply with AS 3740 – Waterproofing of Domestic Wet Areas.

This standard outlines:

1) Where waterproofing membranes must be applied

2) Minimum heights for wall waterproofing

3) Floor grading requirements toward drainage outlets

4) Junction sealing and penetration detailing

5) Substrate preparation standards


Non-compliant waterproofing can result in:

1) Failed building inspections

2) Insurance claim rejection

3) Legal disputes in renovations or new builds

4) Expensive demolition and rework


Working to AS 3740 ensures the waterproofing system is installed correctly, tested appropriately, and legally compliant.

Water damage is progressive. What starts as minor seepage can escalate into:

1) Structural timber decay

2) Concrete spalling

3) Internal plaster damage

4) Electrical risks

5) Reduced property value


Professional waterproofing:

1) Extends the lifespan of wet areas

2) Protects structural components

3) Prevents mould-related health concerns

4) Maintains resale value

5) Reduces future maintenance costs

In practical terms, investing in proper waterproofing at the construction or renovation stage is significantly more cost-effective than repairing concealed water damage later.