How do we count windowpanes?
Exterior & interior window cleaning, will be the panes for the kind of window shown below x 2.
Fixed window = 1 pane
Sliding windows = 2 panes
Casement window = 2 panes
Sliding glass door (counts as window) = 2 panes
Divided or cut-up window & Double-hung window = 2 panes
Jalousie window = 3 panes
Garden window = 5 panes / Triple Pane window = 3 panes