Carpenter Red Seal Exam Prep · Question
Which type of insulation offers the highest R-value per unit thickness among commonly used residential insulation materials?
Polyisocyanurate (polyiso) rigid insulation typically offers the highest R-value per inch (or per 25 mm) compared to other common insulation types like fibregla
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Question: Which type of insulation offers the highest R-value per unit thickness among commonly used residential insulation materials?
Answer options:
- Fibreglass batts
- Mineral wool batts
- Expanded polystyrene (EPS) rigid insulation ✅ Polyisocyanurate (polyiso) rigid insulation
Correct answer: Polyisocyanurate (polyiso) rigid insulation
Explanation: Polyisocyanurate (polyiso) rigid insulation typically offers the highest R-value per inch (or per 25 mm) compared to other common insulation types like fibreglass, mineral wool, or EPS.
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- 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
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