Fiber Cement Cladding with XPS Ultra 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 CM-2030 SPF | |
| Exterior Gypsum Sheathing* | - | - | |
| Self Adhered Air/Water/Vapor Barrier** | Carlisle | 705 FR-A | |
| Continuous Insulation** | Dow | 3" Styrofoam Ultra XPS | |
| Cladding Attachment System** | Knight Wall | HCI System | |
| Fiber Cement Cladding** | SVK | Colormat | |
* For a 1 hour fire rating change Exterior Gypsum Sheathing to Fire Rated Exterior Gypsum Sheathing. ** Product recommendations are based on Type I-V construction not requiring NFPA 285 assembly acceptance criteria compliance. | |||
Assembly Performance:
(proposed clear wall U-Factors are approximately 19% | 38% better than code and have 95% | 74% thermal effectiveness)
Clear Wall | Code Minimum | Proposed |
| Design R-Value: a | R-13 + R-7.5ci | R-16.8ci | R-12.8 + R-16.8ci |
| Total R-Value: | N/A | R-21.23 | R-34.03 |
| Effective R-Value:c | N/A | R-20.07 | R-25.19 |
| Design U-Factor: a, b | U-0.064 | U-0.052 | U-0.040 |
| Effective U-Factor: c | N/A | U-0.050 | 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. | ||