If you're planning a development in England or Scotland, you've likely encountered the requirement for infiltration testing. But what does that mysterious threshold of 1×10⁻⁶ metres per second actually mean, and why is it so critical to your drainage design? Let's cut through the technical jargon and explain what you really need to know. Why We Test Infiltration Rates On-Site Infiltration testing isn't just a box-ticking exercise. It's fundamental to understanding how your si

Sustainable Drainage Systems (SuDS) have become non-negotiable for property developers across England and Scotland. With planning authorities increasingly scrutinising drainage proposals and climate change intensifying flood risks, understanding the seven National SuDS Standards isn't just about compliance. It's about protecting your investment and delivering developments that stand the test of time. After four decades in drainage design and working on projects from individua

Introduction: If you're an architect or developer working on a new site, you've likely encountered the National SuDS Standards and their emphasis on sustainable drainage. But there's one principle that often gets overlooked in the rush to finalise layouts and submit planning applications: Principle 5 , which states that surface water management should inform your site layout from the very beginning. In reality, drainage designers are frequently brought in after buildings, roa