Australian Waterproofing Standards for Shower Repairs
                     AUSTRALIAN WATERPROOFING 
STANDARDS FOR SHOWER REPAIRS
• If the shower is looking fine and working perfectly, we 
continue to ignore common problems for a long time. 
• For example: steam still hanging in the bathroom, cracked 
grout near the corner or that faint smell. 
• The fact is that most leaking showers start with these 
symptoms that we ignore and allow the damage to spread 
significantly.
• Throwing silicon over the joints and hoping for the best is a 
temporary solution, and it will only buy time.
• The moisture is trapped deeper in the wall cavity, and if 
ignored for too long, it can turn into a $ 12,000 bathroom 
rebuild project.
THE WARNING SIGNS MOST 
HOMEOWNERS IGNORE
• Steam lingering longer
• Cracked grout corners
• Musty bathroom smells
• Hidden moisture build-up
WHAT AS-3740 COVERS
• Waterproof Membranes
• Wall & Floor Junctions
• Drainage Falls
• Movement Joints
• Waterproof Heights
• Shower Hobs
Tiling Compliance ≠ Waterproofing 
Compliance
THE LEAK STARTS BEFORE 
YOU SEE IT
Visible Problems:
• Cracked Tiles
• Loose Grout
Real Causes:
• Failed Membrane
• Timber Movement
• Poor Ventilation
QUICK FIXES VS PROPER 
REPAIRS
Temporary Fixes:
• Surface Sealant
• Short-Term Relief
Professional Repairs:
• Waterproof Assessment
• Long-Term Protection
THE REAL COST OF 
IGNORING LEAKS
• Small Grout Crack → Moisture Intrusion → 
Membrane Failure → Wall Damage → Costly 
Bathroom Rebuild
THANK YOU
• Protect Your Bathroom Before Damage Spreads
• Shower Sealed
• Po Box 7129 Southport Park 4215
• https://showersealed.com.au/