Vault French Doors, also known as double doors or double windows, are a pair of glass doors usually opening from the back of a house into its garden or onto its balcony. This concept of opening both sashes fully without seeing a center obstruction has influenced French architecture since the 17th century. The whole grace and dignity of many European buildings were based on this majestic design principle. Modern fenestration adopted the uniqueness of French doors and French windows, mainly upgrading the design for high-performance glazing and sophisticated locking devices whilst retaining the original character.

Vault casement sashes are suitable for French doors and French windows
Available in opening-out and open-in mode
Internal glazing option from 4 mm single to 36 mm double
Choice of numerous multi-point locking devices including full perimeter locking
French doors are available threshold-less or with an Aluminum low threshold
Choice of hinge types including concealed (invisible) hinges