Inadequate Thermal Bridging

PROJECT COMPLIANCE DATA SHEET: CUSTOM STRUCTURAL SANDWICH WALL ASSEMBLY

• Module Dimensions: 12" Width x 16" Height

• Tributary Area per Module: 1.333 sq. ft. (192 sq. inches)

• Total Assembly Thickness: 13.0 Inches

• Required Code Performance: R-19.0 Minimum (U-Factor ≤ 0.0526)

PART 1: CROSS-SECTIONAL PATH BREAKDOWN (SURFACE AREA ANALYSIS)

Path A: Insulated Pockets (Zone of Maximum Thermal Resistance)

• Area Contribution: 50.0% of total wall area (96.0 sq. inches per module)

• Layer Profiles (Exterior to Interior):

  1. Outside Air Film (Winter/Standard) — R-0.17

  2. Exterior Panel Face (Concrete over Foam Pocket) — R-0.34

  3. Embedded Panel Polyiso Insert (1.5" Thick) — R-9.00

  4. Continuous Polyiso Core Sheet (4.0" Thick) — R-24.00

  5. Poured Concrete Structural Core (5.0" Thick) — R-0.40

  6. Interior Panel Face (Concrete over Foam Pocket) — R-0.34

  7. Embedded Panel Polyiso Insert (1.5" Thick) — R-9.00

  8. Inside Air Film (Still Air) — R-0.68

• Path A Nominal Thermal Resistance: R-43.93

Path B: Integrated Solid Columns & Welded Mesh Zone (Thermal Bridge)

• Area Contribution: 50.0% of total wall area (96.0 sq. inches per module)

• Connectors: 1.5" No. 9 Expanded Steel Mesh (0.115" Strand Thickness)

• Layer Profiles (Exterior to Interior):

  1. Outside Air Film (Winter/Standard) — R-0.17

  2. Exterior Panel Vertical Solid Rib (2.0" Thick) — R-0.16

  3. Continuous Polyiso Core Sheet (4.0" Pierced)* — R-11.40
     *Adjusted for 3D lateral thermal convergence & steel conductivity.

  4. Poured Concrete Structural Core (5.0" Thick) — R-0.40

  5. Interior Panel Vertical Solid Rib (2.0" Thick) — R-0.16

  6. Inside Air Film (Still Air) — R-0.68

• Path B Effective Thermal Resistance: R-12.97