Practice Test Geeks(CFI) Certified Flooring Installer Practice Test
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Subfloor Assessment & Preparation Flashcards

7 cards from real CFI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Subfloor Assessment & Preparation flashcards as text

  1. When assessing an existing subfloor for a new flooring installation, what is the FIRST step a CFI installer should perform?

    Answer: Conduct a visual and physical inspection for structural integrity, moisture, and flatness

    A thorough inspection must precede any preparation work to identify all deficiencies and develop the correct remediation plan.

  2. What is the minimum compressive strength required for a self-leveling underlayment used beneath ceramic tile?

    Answer: 3,000 psi

    Self-leveling underlayments used under tile must achieve a minimum of 3,000 psi compressive strength to withstand point loads without cracking.

  3. A subfloor is found to have localized soft spots where the wood is spongy underfoot. What does this indicate?

    Answer: Moisture damage or rot has compromised the panel's structural integrity

    Spongy areas indicate delamination or rot from moisture intrusion, requiring panel replacement rather than surface patching.

  4. What product is used to fill wide cracks (over 1/4 inch) in a concrete slab before flooring installation?

    Answer: Hydraulic cement or epoxy filler

    Wide cracks require a rigid hydraulic cement or epoxy crack filler to prevent movement from telegraphing through the finished floor.

  5. What is the ASTM standard that governs the use of the anhydrous calcium chloride test for measuring moisture vapor emission from concrete?

    Answer: ASTM F1869

    ASTM F1869 is the standard test method for measuring moisture vapor emission rate (MVER) of concrete floors using anhydrous calcium chloride.

  6. Which fastener type provides the best holding power in a wood subfloor to minimize panel movement and squeaks?

    Answer: Ring-shank nails or screws

    Ring-shank nails and screws have mechanical interlock with wood fibers, dramatically increasing withdrawal resistance compared to smooth-shank fasteners.

  7. If a concrete subfloor has a cure-and-seal compound applied that tests as bond-breaking, what is the correct remediation sequence?

    Answer: Mechanically scarify the surface, vacuum debris, then test adhesion again

    Mechanical scarification physically removes the sealer, and adhesion testing after cleaning confirms the surface is ready for the chosen installation system.