Composite doors do not necessarily need special frames, but it is recommended to use a frame that is designed specifically for composite doors to ensure proper installation and optimal performance. Composite doors are heavier than uPVC doors, so the frame must be strong enough to support the weight of the door. A composite door frame is typically made from reinforced uPVC or timber, which provides extra strength and durability. Using the correct frame also helps to ensure that the door is properly sealed and insulated, which helps to improve energy efficiency and reduce drafts