How can I hide the gap under my door frame?
Measure the gap and cut a piece of the casing to size with a coping saw. Color the piece with a stain marker, apply glue to it and tap it into the gap under the casing with a hammer. If there’s a slight line where you can see the joint in the casing, use a putty crayon to color it.
What is kerf style weather stripping?
Kerf style means that the door jamb has a thin saw cut “kerf” that accepts the weatherstripping fin. This fin wedges into the kerf and holds the weather strip seal in place by friction.