When you factor in the toughness of aluminium, it’s quite extraordinary that aluminium bi-folding doors can be operated with such simplicity. What’s also astonishing is how much glass is within each individual door leaf, which can be credited to aluminium being a material that’s easily moulded into the sleekest sightlines. At times, you completely overlook the aluminium frames around the glass as the glazing takes centre stage. With so much glass in the windows and doors, no other room in the house offers quite as much of a bright atmosphere.