What’s Actually Holding Your Windows and Doors In? | UK Openings Explained

What actually holds a window or door in place—and what keeps the junction dry, warm and working properly? This episode follows the hidden construction around British windows and doors: lintels, cavity trays, sills, frame packers and fixings, weather seals, airtightness, glazing, ventilation and common installation faults. Buildings Understood · How Buildings Work · Episode 5, following Foundations, Cavity Walls, Floors and Roofs. Chapters: 00:00 The hidden system around the frame 00:58 Loads, lintels and bearings 01:38 Cavity trays, sills and drainage 02:18 Cavity closure and insulation 02:56 Survey, packers and frame fixings 03:54 Weather seals and airtightness 04:52 Glass units and glazing blocks 05:32 Safety glass and thermal performance 06:11 Thresholds and ventilation 06:52 Security, fire and escape 07:32 Movement and fault diagnosis 08:31 The complete opening Illustrative 3D construction visuals explain principles. Details depend on the building, structural design and selected system. Regulatory references in the episode are for England. #BuildingsUnderstood #WindowsAndDoors #UKConstruction