The Pattern 10 Unfinished Oak French Doors are constructed using a preservative-treated timber core and genuine White Oak face veneers – supplied unfinished, ready for you to apply your choice of suitable exterior stain or paint. The doors are factory-fitted with 20mm insulating double glazed units which results in a whole product U Value of 1.6 W/m2K. This item is delivered direct to you from one of our suppliers, please see our Terms & Conditions for more details.