Masonry Wall R-Value Calculator

The Masonry Wall R-Value Calculator is a useful tool for determining the thermal resistance of a masonry wall based on the thickness and conductivity of the brick and insulation materials used. This calculator helps architects, builders, and homeowners make informed decisions about the energy efficiency of their structures.

Formula: The R-Value is calculated using the formula: �=Brick ThicknessBrick Conductivity+Insulation ThicknessInsulation ConductivityR=Brick ConductivityBrick Thickness​+Insulation ConductivityInsulation Thickness​

How to Use:

  1. Enter the thickness of the brick in inches.
  2. Enter the conductivity of the brick in Btu/(hrft°F).
  3. Enter the thickness of the insulation in inches.
  4. Enter the conductivity of the insulation in Btu/(hrft°F).
  5. Click the “Calculate” button to get the R-Value.


  • Brick Thickness: 8 inches
  • Brick Conductivity: 0.6 Btu/(hrft°F)
  • Insulation Thickness: 4 inches
  • Insulation Conductivity: 0.2 Btu/(hrft°F)
  • Result: Calculated R-Value = 20.00


  1. Q: What is R-Value? A: R-Value measures the thermal resistance of a material, indicating how well it insulates against heat transfer.
  2. Q: Can I use this calculator for any masonry wall? A: Yes, as long as you have the thickness and conductivity values for the brick and insulation.
  3. Q: How accurate is the calculated R-Value? A: The accuracy depends on the accuracy of the input values. Ensure precise measurements for reliable results.

Conclusion: The Masonry Wall R-Value Calculator simplifies the process of evaluating the thermal performance of masonry walls. By inputting specific details about the brick and insulation, users can quickly determine the R-Value, aiding in the design and construction of energy-efficient structures.

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