Masonry Wall R-Value Calculator

Formula

The formula to calculate the R-Value (R) of a masonry wall is:

\[ R = \frac{T}{U \times A} \]

Where:

\(R\) is the R-Value of the masonry wall
\(T\) is the total thickness of the wall (inches)
\(U\) is the overall heat transfer coefficient
\(A\) is the wall’s surface area (square feet)

What is a Masonry Wall R-Value?

The R-value of a masonry wall refers to its resistance to heat flow. The higher the R-value, the better the wall is at insulating and preventing heat transfer, which can help to reduce energy costs. This value is determined by the type of material used, its thickness, and its density. Common materials used in masonry walls include brick, concrete, and stone.

Example Calculation

Let's assume the following values:

Total Thickness of the Wall (T) = 10 inches
Overall Heat Transfer Coefficient (U) = 0.5
Wall's Surface Area (A) = 100 square feet

Using the formula:

\[ R = \frac{10}{0.5 \times 100} = \frac{10}{50} = 0.2 \]

The R-Value is 0.2.