1. What is a waterproofing membrane? A waterproofing membrane is a protective barrier applied to surfaces such as floors, walls, and substrates to prevent water penetration. It is commonly used in wet areas like showers, bathrooms, balconies, laundries, and basements. 2. Why is waterproofing important? Waterproofing protects the building structure from: Leaks and water damage Mould and mildew growth Rotting timber or corrosion Cracked or lifting tiles Structural weakening of floors and walls Proper waterproofing ensures longevity and prevents costly repairs. 3. What types of waterproofing membranes are used? Liquid-applied membranes: Brush, roll, or spray-on coatings that form a seamless layer. Sheet membranes: Pre-formed sheets applied over surfaces, often with adhesive or mechanical fixing. Cementitious membranes: Cement-based coatings applied to substrates, often for tiled areas. 4. Where is waterproofing membrane applied? Shower and wet room floors and walls Bathroom and laundry floors Balconies and terraces Kitchen splashbacks Basements or subfloors prone to moisture 5. How is waterproofing applied? Surface preparation: Clean, dry, and repair cracks or uneven areas. Primer (if required): Apply a primer to enhance adhesion. Membrane application: Spread, roll, or spray the membrane evenly. Curing: Allow the membrane to fully cure before tiling or exposure to water. 6. How long does waterproofing last? When installed correctly and maintained, waterproofing membranes can last 10–20 years or more. Lifespan depends on product type, surface, and usage conditions. 7. Can I tile directly over a waterproofing membrane? Yes. Most waterproofing membranes are designed to receive tiles. Proper adhesive and grout compatible with the membrane type must be used. 8. Do waterproofing membranes prevent leaks completely? A correctly applied membrane greatly reduces the risk of leaks, but structural issues, improper drainage, or damaged membranes can still cause water problems. Regular maintenance and inspections are recommended. 9. How do I maintain a waterproofed surface? Keep tiles and grout clean Ensure proper drainage in wet areas Inspect silicone/caulking around edges and replace when needed Repair any damage to tiles or membrane promptly 10. Is professional installation necessary? Yes. Proper waterproofing requires correct surface preparation, membrane selection, application technique, and curing. Professional installation ensures compliance with Australian Standards (AS 3740) and long-lasting protection.