Assembly:
Component | Manufacturer | Product | |
Interior Finish (vapor permeable) | - | - | |
Interior Gypsum Board (Type X) | - | - | |
Metal Stud (18 GA. Min. @16” O.C.) | - | - | |
Stud Cavity Insulation (Optional) | Dow | 2" Styrofoam SPF CM-2045 | |
Exterior Gypsum Sheathing* | - | - | |
Self Adhered Air/Water/Vapor Barrier** | Carlisle | 705 FR-A | |
Continuous Insulation** | Dow | 2" Thermax Sheathing | |
Cladding Attachment System** | Knight Wall | CI System | |
Double Wall Terra-Cotta Cladding** | TerrealNA | Piterak Slim 30 | |
* For a 1 hour fire rating change Exterior Gypsum Sheathing to Fire Rated Exterior Gypsum Sheathing. ** Product recommendations are based on Type I-IV construction requiring NFPA 285 assembly acceptance criteria compliance per IBC Sections 1403.5 & 2603.5. |
Assembly Performance:
(proposed clear wall U-Factors are approximately 2% | 25% better than code and have 91% | 80% thermal effectiveness)
Clear Wall | Code Minimum | Proposed |
Design R-Value: a | R-13 + R-7.5ci | R-13ci | R-12.8 + R-13ci |
Total R-Value: | N/A | R-17.47 | R-30.27 |
Effective R-Value:c | N/A | R-15.95 | R-24.27 |
Design U-Factor: a, b | U-0.064 | U-0.063 | U-0.048 |
Effective U-Factor: c | N/A | U-0.063 | U-0.041 |
Assembly Air Permeability | 0.04 cfm/ft2 @75Pa | 0.0014 cfm/ft2 @75Pa |
a Clear wall meets energy code thermal requirements without stud cavity insulation. b Clear wall U-Factor is based on the stud size & spacing noted above and is calculated per IECC 2015 & ASHRAE 90.1-2013 Appendix A. c Clear wall effective thermal performance is based on the stud size & spacing noted above, manufacturer literature and industry studies on the thermal performance of facades. |