How to Replace Brick Molding

Brick molding is the trim, usually profiled, that surrounds a door or window on exterior side (despite the name, it is found on homes with just about every type of siding).  The trick molding generally fits between the door or window frame and siding, which butts up against the outer edges of the molding pieces.  Drip edge flashing fits over the top piece of brick molding and is often slipped beneath the siding above the door or window opening.  Damage occurs most frequently on the top section, especially at the mitered corners.

1.  Pry off the damaged brick molding with a flat pry bar.  Repair any siding damage behind the trim.  Also replace any deteriorated building paper.

2.  Cut a piece of new molding slightly longer than the damaged piece.  Cut to size and test-fit the replacement piece.

3.  Miter-cut new brick molding pieces, prime and paint them to match, and nail them to door or window framing with 16d galvanized casing nails.  Apply a bead of construction adhesive to one of the mating ends before making each joint.  Set the nail heads and fill the nail holes with exterior wood filler.