CFI CFI Wood & Hardwood Flooring

Question 1

What is the recommended acclimation time for solid hardwood flooring before installation in most US residential environments?

Accepted Answer

3–5 days

Answer

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?

Accepted Answer

3/4 inch

Answer

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?

Accepted Answer

Nail/staple-down

Answer

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?

Accepted Answer

4%

Answer

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:

Accepted Answer

Uses a multi-ply construction for greater dimensional stability

Answer

Engineered hardwood uses a multi-ply cross-grain core topped with a hardwood veneer, giving it superior dimensional stability compared to solid wood.

(CFI) Certified Flooring Installer Practice Test