Questions: Question 14 (4 points) MC Ch 12. For climate zone 5, the minimum R value of air impermeable insulation is? 1) R-15+1/2'' foam board 2) R-20 3) 2 times zone 3 B. 4) not less than R-25

Question 14 (4 points) MC Ch 12. For climate zone 5, the minimum R value of air impermeable insulation is? 1) R-15+1/2'' foam board 2) R-20 3) 2 times zone 3 B. 4) not less than R-25

Transcript text: Question 14 (4 points) MC Ch 12. For climate zone 5 , the minimum $R$ value of air impermeable insulation is? 1) $R-15+1 / 2^{\prime \prime}$ foam board 2) $R-20$ 3) 2 times zone $3 B$. 4) not less than R-25

Solution

Solution Steps

Step 1: Understanding the Question

The question asks for the minimum $R$ value of air impermeable insulation for climate zone 5. The $R$ value is a measure of thermal resistance, and higher $R$ values indicate better insulation.

Step 2: Analyzing the Options

We need to evaluate each option to determine which one correctly states the minimum $R$ value for climate zone 5:

$R-15 + 1/2^{\prime \prime}$ foam board
$R-20$
2 times zone $3 B$
not less than $R-25$

Step 3: Identifying the Correct $R$ Value

According to building codes and insulation standards, climate zone 5 typically requires a minimum $R$ value of around $R-20$ to $R-25$ for air impermeable insulation.

Step 4: Selecting the Correct Option

Given the options, the one that fits within the typical range for climate zone 5 is: