CLC Weatherproofing & Energy Efficiency 3

Question 1

A homeowner reports ice dams forming every winter on a low-slope roof section. What is the most effective long-term solution?

Accepted Answer

Add attic ventilation and increase attic insulation to keep the roof deck cold

Answer

Ice dams form when a warm roof deck melts snow that refreezes at the cold eave; proper attic insulation and ventilation keeps the entire deck cold, preventing the cycle.

Question 2

What is the correct installation sequence for flashing at a window rough opening to ensure a weather-tight assembly?

Accepted Answer

Sill pan first, then jamb flashing, then head flashing

Answer

Flashing is installed from the bottom up — sill pan first, then jamb, then head — so each upper layer laps over the one below and sheds water properly.

Question 3

Which metric is used to measure the overall energy efficiency of a whole building envelope per the Energy Star program?

Accepted Answer

HERS Index (Home Energy Rating System)

Answer

The HERS Index rates a home's overall energy efficiency; a score of 100 is code minimum and lower scores indicate a more efficient home.

Question 4

When caulking an exterior joint between dissimilar materials (wood siding and brick), which caulk type is most appropriate?

Accepted Answer

Polyurethane sealant

Answer

Polyurethane sealant adheres well to both porous and non-porous dissimilar materials and remains flexible through thermal expansion cycles.

Question 5

What is the function of a vapor retarder placed on the warm-in-winter side of a wall assembly?

Accepted Answer

Slow moisture diffusion so warm moist air cannot reach the cold dew point zone within the wall

Answer

A vapor retarder on the warm side slows water vapor migration into the wall cavity, preventing condensation at the cold sheathing.

(CLC) Certified Lead Carpenter Practice Test

(CLC) Certified Lead Carpenter Practice Test

CLC Weatherproofing & Energy Efficiency 3