CFI Transition & Trim Installation 3 — Questions and Answers
Question 1: When installing quarter-round shoe molding along a baseboard after a floating floor installation, what is the correct fastening method?
- Nail through the flooring into the subfloor
- Nail into the baseboard only (Correct answer)
- Glue to the flooring surface
- Screw directly into the wall stud
Correct answer: Nail into the baseboard only
Quarter-round must be nailed to the baseboard (not the floor) so the floating floor can expand and contract freely beneath it.
Question 2: A floor reducer shows a visible gap on the low-height side after installation. What is the most likely cause?
- The subfloor has too much moisture
- The reducer was not cut to the correct length
- Insufficient expansion gap was left in the flooring, preventing the reducer from lying flat (Correct answer)
- The track was glued instead of screwed
Correct answer: Insufficient expansion gap was left in the flooring, preventing the reducer from lying flat
If the flooring planks are installed too tight to the reducer track, the reducer cannot sit flat, creating a visible gap on one side.
Question 3: Which trim piece is used to finish the exposed flooring edge at a fireplace hearth?
- T-molding
- Reducer
- End cap (Correct answer)
- Stair nosing
Correct answer: End cap
An end cap (also called a baby threshold) is used to finish a flooring edge that terminates at a vertical surface like a fireplace hearth or a step.
Question 4: On a hardwood floor installation, scotia molding is preferred over quarter-round by many installers because:
- It is easier to cut at corners
- Its flatter profile hugs the floor surface better and produces a cleaner look (Correct answer)
- It can be nailed into the subfloor
- It requires no coping at inside corners
Correct answer: Its flatter profile hugs the floor surface better and produces a cleaner look
Scotia molding has a concave profile that lies flatter against the floor than a quarter-round, resulting in a tighter, more finished appearance at the wall.
Question 5: When mitering outside corner joints on baseboard trim, what combined angle of the two miter cuts should equal?
- 45 degrees total
- 90 degrees total (Correct answer)
- 60 degrees total
- 180 degrees total
Correct answer: 90 degrees total
Each piece is cut at 45 degrees, and the two cuts together form a 90-degree outside corner joint.
Question 6: What tool is used to scribe a baseboard or transition piece to match an irregular or uneven surface?
- Contour gauge or compass (Correct answer)
- Speed square
- Chalk line
- T-bevel
Correct answer: Contour gauge or compass
A contour gauge or compass traces the irregular profile of the surface so the trim can be cut to match exactly.
Question 7: Which statement about coping an inside corner on baseboard is correct?
- Both pieces are cut at 45-degree miters
- The first piece runs square into the corner; the second piece is coped to fit over it (Correct answer)
- Coping is only used on crown molding, not baseboard
- Both pieces are cut with coped profiles
Correct answer: The first piece runs square into the corner; the second piece is coped to fit over it
In coping, the first baseboard piece butts squarely into the corner, and the second piece is back-cut along its profile to overlap the first, creating a tight joint that resists seasonal movement.
CFI Transition & Trim Installation 3
When installing quarter-round shoe molding along a baseboard after a floating floor installation, what is the correct fastening method?