Correctly applied waterproofing typically lasts 10 to 15 years or more with proper care. All AB Sydney Waterproofing work is backed by our 7-year warranty.

The most common cause is an old, worn or damaged membrane that has become brittle or cracked. Poor original installation, building movement, blocked drainage and failed grout or sealant are also frequent culprits.

Often, yes. Tile injection seals the leak through the grout lines without lifting tiles. If the membrane underneath has failed completely, we'll explain why a full re-waterproof is the lasting fix.

Sheet membranes are factory-made rolls bonded to the surface, ideal for large flat areas like rooftops. Liquid membranes are brushed or sprayed on, are joint-free and suit detailed areas like showers and balconies. We recommend the right one after inspecting your site.

Yes, every quote is free. We're based in Liverpool and service homes and businesses across all Sydney suburbs, including the CBD, Parramatta and Western Sydney.