Practice Test Geeks(CLC) Certified Lead Carpenter Practice Test
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Weatherproofing & Energy Efficiency Flashcards

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

Read the first 7 Weatherproofing & Energy Efficiency flashcards as text

  1. During a blower door test, which pressure differential is standardized to measure a building's air leakage rate?

    Answer: 50 Pascals

    Blower door tests are standardized at 50 Pascals (CFM50 or ACH50) to provide a consistent, reproducible measurement of building air tightness.

  2. What is the correct way to detail a kick-out (diverter) flashing at the bottom of a roof-to-wall intersection?

    Answer: Extend it beyond the wall face so water is directed away from the siding, not behind it

    Kick-out flashing must extend past the wall surface to direct roof runoff away from the cladding, preventing water intrusion behind the siding.

  3. Which insulation product has the highest R-value per inch and is commonly used where space is limited?

    Answer: Closed-cell spray foam (R-6.5/inch)

    Closed-cell spray polyurethane foam provides approximately R-6 to R-6.5 per inch, the highest R-value per inch of common insulation materials.

  4. A lead carpenter is replacing a door threshold on an exterior door. Which threshold design best prevents air and water infiltration?

    Answer: Adjustable interlocking threshold with a vinyl insert that seals against the door bottom

    An adjustable interlocking threshold with a vinyl insert creates a continuous compression seal along the full door width, blocking both air and water.

  5. What is the purpose of installing a continuous air barrier at the rim joist of a foundation?

    Answer: Seal one of the most significant air leakage and heat loss points in a building envelope

    Rim joists are a major source of air leakage and thermal loss; sealing them with spray foam or rigid foam plus caulk significantly reduces energy loss.

  6. Which statement correctly describes the difference between an air barrier and a vapor retarder?

    Answer: An air barrier controls bulk air movement; a vapor retarder controls moisture diffusion — they are different functions and sometimes different materials

    An air barrier stops air movement (and vapor carried by air), while a vapor retarder controls slower moisture diffusion through materials — these are distinct functions.

  7. When installing weatherstripping on a door that is slightly warped, which type of weatherstripping can best accommodate an irregular gap?

    Answer: V-strip pile weatherstripping (fin seal)

    Fin seal (V-strip pile) weatherstripping uses flexible pile fibers that compress into varying gap sizes, accommodating warped or irregular door gaps.