They are a series of interconnected louvred doors hung on a frame. These frames can be fitted inside or outside the window recess and are not fitted onto the window itself.
All louvres open and close through 180 degrees, doors can be folded back to assist with window cleaning.
There are a number of door combinations for larger windows and this is assessed upon site survey with the customers.
Lourve sizes are available in 47mm, 63mm, 76mm, and 89mm slats.