Panel doors use a basic joinery method with the panels recessed or raised into a door which can be either solid or composite. They are surrounded by simple or more intricate stiles, rails and mullions.
Wood tends to move because of its natural form, expanding and contracting depending on humidity, but a panel door is constructed in a way to resist this movement.
The outer stiles, which are vertical frames, are responsible for the hardening of the wing and prevent the doors from buckling, keeping the door straight so it functions well. The centre stiles divide the space to accommodate the panels.
The rails are horizontal lengths, which as well as keeping the outer stiles parallel, also frame the panels. Every panel door has a top, middle and bottom rail to help with its rigidity. The mullion forms the divisions between the different panels of the door and runs vertical. The elements of the door are bonded together using an industrial strength adhesive.
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