Metal Panel Cladding with Nail Base Continuous Insulation & Metal Stud Backup
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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 | HCI System |
| Fabricated MCM Cladding** | Alucoil | Larson MCM-FR |
* 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 89% | 79% 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-18.53 | R-31.33 |
| Effective R-Value:c | N/A | R-16.50 | R-24.82 |
| Design U-Factor: a, b | U-0.064 | U-0.063 | U-0.048 |
| Effective U-Factor: c | N/A | U-0.061 | U-0.040 |
| 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. | ||