Why is it important to keep a wall straight and plumb before finishing?

• A. To ensure proper door/window alignment and square openings
• B. To ensure proper paint adhesion
• C. To prevent termite damage
• D. To keep the wall light and airy

Answer: (B)

Keeping a wall straight and plumb before finishing ensures door and window openings stay square and the jambs and trim fit correctly. When walls are true, the frames sit flush in their openings, doors and windows latch properly, and the finish surfaces—drywall, plaster, trim, and casing—sit cleanly without gaps or uneven edges. If a wall isn’t straight or plumb, openings can become misaligned, and misfit finishes become obvious, making later work much harder. The other options aren’t the primary reason: paint adhesion isn’t dictated by wall plumb, termites aren’t addressed by straightness, and a wall being straight doesn’t directly affect how lightweight or airy it feels.