CFI CFI Wood & Hardwood Flooring 1 — Questions and Answers
Question 1: What is the recommended acclimation time for solid hardwood flooring before installation in most US residential environments?
- 24 hours
- 3–5 days (Correct answer)
- At least 72 hours with no further acclimation needed
- Acclimation is not required for solid hardwood
Correct answer: 3–5 days
Solid hardwood should typically acclimate on-site for 3–5 days to equalize with the room's temperature and humidity.
Question 2: When installing solid hardwood flooring, what minimum expansion gap should be left around the perimeter of the room?
- 1/16 inch
- 1/8 inch
- 3/4 inch (Correct answer)
- 1/4 inch
Correct answer: 3/4 inch
A 3/4-inch expansion gap around the perimeter allows solid hardwood to expand and contract with seasonal humidity changes without buckling.
Question 3: Which installation method is most commonly used for installing solid hardwood flooring over a wood subfloor?
- Floating
- Glue-down
- Nail/staple-down (Correct answer)
- Peel-and-stick
Correct answer: Nail/staple-down
Nail- or staple-down is the standard method for solid hardwood over wood subfloors, providing a secure mechanical fastening.
Question 4: What is the maximum acceptable moisture content (MC) difference between a solid hardwood plank and the wood subfloor at the time of installation?
- 1%
- 3%
- 4% (Correct answer)
- 8%
Correct answer: 4%
A moisture content difference of no more than 4% between the hardwood and the subfloor is generally acceptable to prevent excessive movement.
Question 5: Engineered hardwood flooring differs from solid hardwood primarily because it:
- Cannot be sanded or refinished
- Uses a multi-ply construction for greater dimensional stability (Correct answer)
- Must always be installed with adhesive
- Is made entirely of synthetic materials
Correct answer: Uses a multi-ply construction for greater dimensional stability
Engineered hardwood uses a multi-ply cross-grain core topped with a hardwood veneer, giving it superior dimensional stability compared to solid wood.
Question 6: When face-nailing hardwood flooring near a wall where blind-nailing is not possible, nails should be placed:
- In the center of the plank
- At a 90-degree angle through the top face, then countersunk and filled (Correct answer)
- Along the groove edge only
- Through the tongue at 45 degrees
Correct answer: At a 90-degree angle through the top face, then countersunk and filled
Face nails are driven straight down through the top of the plank, then countersunk below the surface and the holes filled with matching wood filler.
CFI CFI Wood & Hardwood Flooring 1
What is the recommended acclimation time for solid hardwood flooring before installation in most US residential environments?