Striking plates / weatherboards are necessary to prevent rain from saturating the base of the door and the sill. The special mouldings are shaped to guide the rain away from the base of the door.
Measure the width of the exterior door. A slight angle is required at the end where the door meets the frame on the side of the latch. This provides a clear swing of the door when opening to clear the frame. Use a waterproof adhesive and screws to attach the moulding to the door. Fill or plug the screw holes. Make sure there is a weatherproof seal where the moulding meets the door. Prime the surfaces and paint and finish the door.
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