CFI CFI Hardwood & Engineered Wood Flooring 2 — Questions and Answers
Question 1: Which installation method is most commonly used for engineered wood flooring over a concrete slab?
- Blind-nailing
- Glue-down
- Floating (Correct answer)
- Face-stapling
Correct answer: Floating
Floating installation is commonly used for engineered wood over concrete because it allows the floor to move as a unit without being bonded to the slab.
Question 2: What does 'crowning' in hardwood flooring indicate?
- The center of a board is higher than its edges due to moisture on the top surface (Correct answer)
- The edges of a board are higher than its center
- Boards are installed in a crown pattern
- A board has been improperly nailed at its crown
Correct answer: The center of a board is higher than its edges due to moisture on the top surface
Crowning occurs when the center of a hardwood plank rises higher than its edges, typically caused by moisture absorbed from the top surface of the board.
Question 3: When installing hardwood flooring parallel to floor joists, CFI recommends:
- No special treatment is required
- Using thicker planks only
- Adding a layer of 3/8-inch plywood to stiffen the subfloor (Correct answer)
- Gluing all boards to the subfloor
Correct answer: Adding a layer of 3/8-inch plywood to stiffen the subfloor
Installing perpendicular to joists is ideal, but when parallel installation is required, adding 3/8-inch plywood provides needed rigidity to prevent deflection and squeaking.
Question 4: What is the purpose of staggering end joints in hardwood flooring installation?
- To reduce material waste
- To prevent a weak structural seam and improve aesthetics (Correct answer)
- To speed up the installation process
- To allow easier removal later
Correct answer: To prevent a weak structural seam and improve aesthetics
Staggering end joints by at least 6 inches prevents weak structural seams and creates a more visually appealing random pattern.
Question 5: Which tool is used to pull the last few rows of hardwood flooring tight against the preceding row when a pneumatic nailer cannot fit?
- Pry bar only
- Pull bar and rubber mallet (Correct answer)
- Jigsaw
- Floor roller
Correct answer: Pull bar and rubber mallet
A pull bar hooked on the board's end combined with a rubber mallet drives the final rows tight without damaging the flooring surface.
Question 6: Solid hardwood flooring should NOT be installed over radiant heat systems unless:
- The flooring is unfinished
- The subfloor is concrete only
- The manufacturer specifically approves it and temperature limits are followed (Correct answer)
- The floor is first glued down
Correct answer: The manufacturer specifically approves it and temperature limits are followed
Only hardwood products explicitly approved by the manufacturer for radiant heat use should be installed over such systems, with surface temperature not exceeding 80°F.
CFI CFI Hardwood & Engineered Wood Flooring 2
Which installation method is most commonly used for engineered wood flooring over a concrete slab?