Carpenter Red Seal Exam Prep · Question
A carpenter is installing a weather-resistive barrier (WRB) on an exterior wall before siding. What is the primary purpose of this WRB?
The primary purpose of a weather-resistive barrier (WRB) is to prevent bulk water from entering the wall assembly from the exterior, while being vapour permeabl
Start free practice for Carpenter Red Seal Exam Prep
300 questions · no signup required · 40 free questions per day
Question: A carpenter is installing a weather-resistive barrier (WRB) on an exterior wall before siding. What is the primary purpose of this WRB?
Answer options:
- To provide structural rigidity to the sheathing.
- To prevent air leakage into the building.
- To act as the primary thermal insulation. ✅ To prevent moisture penetration from the exterior while allowing trapped moisture vapour to escape.
Correct answer: To prevent moisture penetration from the exterior while allowing trapped moisture vapour to escape.
Explanation: The primary purpose of a weather-resistive barrier (WRB) is to prevent bulk water from entering the wall assembly from the exterior, while being vapour permeable enough to allow any moisture that does get into the wall cavity to dry out. It is not intended for structural rigidity, primary air sealing, or thermal insulation.
Start free practice for Carpenter Red Seal Exam Prep
300 questions · no signup required · 40 free questions per day
More about Carpenter Red Seal Exam Prep
Related Questions
- When interpreting a foundation plan, a dashed line with 'P. WALL' typically represents which of the following?
- A site plan shows contour lines with an interval of 0.5 m. If two adjacent contour lines are labelled 124.0 m
- According to the National Building Code of Canada (NBC) 2020, what is the primary consideration for the requir
- Two offset stakes are driven at 2.0 m from the proposed edge of a concrete slab. The first stake is marked 'Cu
- What is the primary purpose of string lines and batter boards when laying out a foundation?
- According to typical blueprint conventions, a heavily dashed line (longer dashes) often represents an item tha
More for Carpenter Red Seal Exam Prep candidates
Practice tests
Question explanations
- When interpreting a foundation plan, a dashed line with 'P. WALL' typically represents which of the following?
- A site plan shows contour lines with an interval of 0.5 m. If two adjacent contour lines are labelled 124.0 m
- According to the National Building Code of Canada (NBC) 2020, what is the primary consideration for the requir
- Two offset stakes are driven at 2.0 m from the proposed edge of a concrete slab. The first stake is marked 'Cu
Ready to practice?
Free, no signup required. Build a wrong-question list as you go.
Start Free Carpenter Red Seal Exam Prep Practice →Related courses
Other Canadian certifications candidates often prepare for alongside this one.