★Great for energy efficiency, safety and security, Topbright provides options to give you peace of mind for your exterior sliding bi-fold aluminum and glass doors. ★ Bi fold doors can be used in a wide range of areas within the home, the most popular being a room divider is between a living room and a conservatory or a dining room with either a kitchen/living room. ★ Room for entertaining guests – Easier to socialise without splitting into separate rooms. ★ Private spaces – Sometimes you need some time to yourself, walls and doors are great for that. ★ All aluminum frames and panels are thermally broken with a full weather-stripped structural interlock system for improved energy efficiency.