Special Conditions Glass Units/Panes. The following special conditions apply to a claim under this Warranty in regard to Arbor double or triple glazed units: The glass panes must have been fitted in a Arbor factory or by a Arbor Approved Installer or Service Engineer. A fault in a glass pane will not be covered where the glass pane has been damaged by external conditions, e.g. knocks or blows, or by movements in adjoining buildings, damage by frost, thermal effect or any chemical damage to the glass. The glass pane will not be covered where it has been exposed to any processing after delivery, e.g. grinding, sand blasting, etching, painting, sticking on, or any other surface treatment. The drain path on the window system must not have been blocked. This Warranty does not apply to exterior condensation appearing outside the cavity (whether indoor or outdoor) of Arbor double or triple glazed units. This Warranty only covers that Arbor double or triple glazed units shall remain free of particles of dust or of humidity in the unit cavity for ten (10) years in the case of windows, patio doors, sliding doors and casement doors and five (5) years in the case of flush and glazed entrance doors
