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. What is the recommended minimum R-value for attic insulation in a cold climate zone (Zone 5-8) per IECC standards?

    Answer: R-49

    IECC recommends R-49 minimum for attic insulation in climate zones 5-8 to meet energy efficiency requirements.

  2. Which type of window glazing provides the best solar heat gain control while maintaining visible light transmission?

    Answer: Low-E coated glass

    Low-E (low emissivity) coatings selectively filter infrared radiation, reducing heat gain while allowing visible light through.

  3. A lead carpenter discovers a thermal bridge at a steel lintel above a window. What is the best corrective approach?

    Answer: Add a continuous layer of rigid foam insulation over the lintel on the exterior

    Continuous rigid foam insulation on the exterior breaks the thermal bridge by preventing direct conductive heat transfer through the steel.

  4. What is the primary purpose of a house wrap (such as Tyvek) installed under siding?

    Answer: Serve as a water-resistive barrier while allowing vapor to escape

    House wrap is a water-resistive barrier (WRB) that blocks liquid water infiltration while remaining vapor-permeable to allow drying.

  5. When installing blown-in insulation in existing walls through drilled holes, what is the correct hole spacing typically used?

    Answer: Every stud bay, about 16 or 24 inches on center

    Holes are drilled in each stud bay (typically 16" or 24" O.C.) to ensure every cavity is filled with blown-in insulation.

  6. What does SHGC stand for on a window energy label, and what does a lower value indicate?

    Answer: Solar Heat Gain Coefficient; lower means less solar heat enters the building

    SHGC (Solar Heat Gain Coefficient) measures how much solar radiation passes through a window; a lower value means less heat gain.

  7. Which air sealing material is most appropriate for filling large irregular gaps around pipes and ducts penetrating the top plate?

    Answer: Closed-cell spray foam

    Closed-cell spray foam expands to fill irregular voids and provides both air sealing and moisture resistance around penetrations.