These doors have been designed to give great thermal and acoustic performances with a typical U-value of 1.6W/m2K. With water-tightness up to 1,050Pa and maximum leaf weights of 400kg these doors can be used in any situation. The lift and slide operation makes them secure and easy to use. Leaf sizes up to 3000mm wide or 3000mm tall are possible. Wind resistance performance of Class B5/C5. Through the use of extended locking keeps we allow for secure trickle ventilation to conform with the Building Regulations.