Questions: Door and Window Adjustment and Alignment

Question 1

A door sags and scrapes the floor on the latch side. What should you check first?

• A. The door frame needs to be rebuilt — sagging indicates a structural failure
• B. The hinge screws on the hinge side are likely loose and need tightening
• C. The door itself must be trimmed at the bottom to clear the floor
• D. The floor has settled and requires leveling before the door can be adjusted

Answer: (B)

A door that sags and scrapes almost always has loose hinge screws — the hinge is no longer holding the door in its correct position. Tightening the screws is the first and often the entire fix. The common misconception is to assume the problem is structural (frame or floor), which leads people to undertake expensive work when simple hardware adjustment would solve it.

Question 2

When shimming behind a hinge to reposition a door frame, the shim...

• A. Creates a weak point in the frame that will need reinforcement later
• B. Is purely spacial — it positions the frame but does not bear structural load
• C. Transfers force to the structural framing, strengthening the assembly when correctly placed
• D. Works by compressing the wood and should be removed once the frame has set

Answer: (C)

This is the key misconception about shimming: people assume inserting a wedge weakens the frame. In reality, shims transfer load to the structural rough opening — they are load-bearing elements. Proper shimming doesn't weaken the frame; it restores correct force distribution. This is why shimming is considered a structural fix, not a temporary patch.

Question 3

A stripped screw hole in a door hinge can be repaired by filling it with wooden toothpicks and wood glue, letting it dry, trimming flush, and re-driving the screw.

• T. True
• F. False

Answer: True

This is a standard repair technique that works reliably. The wood filler (toothpicks and glue) fills the stripped void and gives the screw fresh wood fibers to grip. It restores the mechanical strength of the connection without needing to replace the hinge or the door jamb. This illustrates the broader principle: most door hardware problems are fixable with simple techniques, not replacement.

Question 4

A double-hung window that won't stay open in the raised position typically requires a full window replacement, since the sash mechanism can seldom be repaired separately.

• T. True
• F. False

Answer: False

A window that won't stay open has a weakened or broken balance spring — the spring-loaded mechanism that counterbalances the sash weight. Balance springs are replaceable parts that can be ordered by window brand and size. This is a component repair, not a whole-unit replacement. The broader misconception — that malfunctioning windows or doors need full replacement — is the most expensive mistake homeowners make.

Question 5

Why does proper shimming strengthen rather than weaken a door frame assembly?

Model answer: Shims transfer load from the door frame to the structural rough opening (the framing around the opening). Without shims, the frame floats without proper support; with shims correctly placed, force is distributed to the structural framing members. This is why shimming is considered structural — it creates load paths that didn't exist before.

The intuition that 'adding something thin must create a weak point' is wrong. A shim under compression between two structural members bridges the gap between them and makes the assembly act as a unit. This is the same principle used in construction everywhere: tapered wedges and shims are used precisely because they can transmit compressive loads effectively.