Yes, our bi-fold doors achieve a thermal efficiency value of 0.9, which is a market lead for this style of door. Bi-fold doors consist of a strong aluminium frame with either double or triple glazed glass panes filled with argon gas. That makes these doors extremely thermal-efficient and highly resilient to weather. We offer personalized services for Bifold Doors in Northern Ireland, Bi fold Doors in NI, and Bi fold Doors in Belfast.