Understanding the performance of a rooflight can be difficult, especially for those of us who don’t have a degree in physics or read British Standards in our spare time.
What does ±2000 Pa serviceability mean? Is it relevant to my project? Do I even need a performance tested rooflight?
Without getting into the boring long-winded codes of the British and European Standards, windows, doors and rooflights should be tested for “weather tightness”. This has three main components to it, air permeability, water-tightness and wind resistance. Continue reading »