Core TradesCâu 205 / 700
To completely fill the cavity of a nominal 2x6 wood-framed exterior wall, which batt insulation R-value is most typically specified?
a.R-11
b.R-15
c.R-21
d.R-30
Giải thích
A high-density R-21 batt is sized to fill the roughly 5.5-inch cavity of a 2x6 wall. R-11 and R-15 are intended for shallower 2x4 walls, and R-30 is a ceiling/floor value too thick to fit a 2x6 wall cavity.
Trích dẫn luật: 2025 CA Energy Code (Title 24, Part 6)Luyện miễn phí toàn bộ 700 câu hỏi — không cần đăng ký.
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