Bathroom renovations and remodeling are major home projects and the importance of waterproofing your new space cannot be overlooked. Dampness, water leaks and condensation can cause major structural damage to your newly designed bathroom. The Building Code of Australia sets out waterproofing requirements for residential bathrooms and these must be followed by law. The Building Code of Australia specifies which areas need to be waterproofed, how junctions are treated and which systems are deemed to be waterproof. Ensure you use a licensed waterproofer and ask for a certificate of guarantee for the works.