Concrete Mix Ratio Explained | Why Adding Extra Water Weakens Your Home Structure Over Time Most homeowners don’t realise this, but one of the biggest reasons homes develop cracks or lose strength over time is because the concrete mix wasn’t done correctly. This is a mistake that happens silently on site and often goes unnoticed until problems start appearing years later. Many local contractors add extra water to concrete just to make mixing and pouring easier. While it may speed up their work,