CFI Hardwood & Engineered Wood Flooring Flashcards

What is the maximum moisture content (MC) of a wood subfloor acceptable before installing solid hardwood flooring per CFI standards?

Answer: 10%

CFI requires the wood subfloor to be at or below 10% MC before solid hardwood installation to prevent moisture-related failures.

When sanding a newly installed hardwood floor, the final sanding pass should use which grit sequence finish?

Answer: 120 to 150-grit

Final sanding passes with 120–150-grit paper create a smooth surface that accepts finish coats evenly without deep scratch patterns.

A 'floating' engineered floor installation requires an underlayment primarily to:

Answer: Provide sound attenuation and minor subfloor irregularity compensation

Underlayment under floating engineered floors reduces impact noise transmission and helps bridge minor subfloor irregularities up to about 3/16 inch.

Which direction should hardwood flooring boards run relative to the longest wall in most residential installations?

Answer: Parallel to the longest wall

Running boards parallel to the longest wall (or room length) visually elongates the space and is the standard recommended direction per CFI.

Prefinished hardwood flooring differs from site-finished hardwood in that it:

Answer: Has factory-applied finish requiring no on-site coating

Prefinished hardwood arrives with factory-cured aluminum oxide or UV-cured finish already applied, eliminating on-site sanding, staining, and coating steps.

What is the recommended fastener spacing when blind-nailing solid 3/4-inch hardwood flooring?

Answer: Every 6–8 inches

CFI recommends blind-nailing every 6–8 inches along the tongue of each hardwood board to ensure adequate hold and prevent squeaking.