Finish Carpentry & Trim Work Flashcards

When installing crown molding on an out-of-plumb wall, which adjustment technique is most appropriate?

Answer: Spring the molding angle and adjust the miter cuts accordingly

Adjusting the spring angle and recalculating miter cuts accommodates out-of-plumb walls while maintaining a tight fit at corners.

What is the standard reveal on a door casing where it meets the door jamb?

Answer: 3/16 inch

A 3/16-inch reveal is the industry standard setback from the edge of the jamb, providing a consistent shadow line around the door opening.

Which saw setup produces the most accurate coped joint for inside corners of baseboard?

Answer: Miter saw cut at 45° followed by a coping saw

A 45° miter saw cut exposes the profile, which is then back-cut with a coping saw to create a coped joint that overlaps the first piece.

When installing wainscoting panels, what is the correct sequence of installation?

Answer: Base, panels, chair rail, cap rail

Installing the base first establishes the bottom reference, panels are fit to it, and the chair rail or cap rail finishes the top edge.

What causes a mitered outside corner on base molding to open up (gap) after installation?

Answer: Wood shrinkage as the moisture content decreases

As lumber dries and loses moisture, it shrinks across the grain, causing mitered outside corners to open over time.

When fitting a door casing around a rough masonry opening, which profile is typically used first?

Answer: Brick molding

Brick molding is designed with a rabbet that overlaps the window or door frame and bridges the transition to masonry or siding.

What is the primary purpose of a backer block (rosette) at the corner of a door casing?

Answer: To eliminate the need for mitered or coped corner joints

Rosette or plinth blocks allow horizontal and vertical casings to meet at a square-cut butt joint, eliminating difficult miter or cope work.