Fiber Cement Cladding with XPS Ultra Continuous Insulation & Wood Stud Backup
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Assembly:
| Component | Manufacturer | Product |  |
| Interior Finish (vapor permeable) | - | - | |
| Interior Gypsum Board (Type X) | - | - | |
| Wood Stud (2x6 @16” O.C.) | - | - | |
| Stud Cavity Insulation (Optional) | - | R-19 Batt | |
| Plywood Sheathing* | - | - | |
| Self Adhered Air/Water/Vapor Barrier* | Carlisle | 705 | |
| Continuous Insulation* | Dow | 2 1/2" Styrofoam Ultra XPS | |
| Cladding Attachment System* | Knight Wall | HCI System | |
| Fiber Cement Cladding** | SVK | Colormat | |
* 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 13% | 48% better than code and have 95% | 85% thermal effectiveness)
Clear Wall | Code Minimum | Proposed |
| Design R-Value: a | R-13 + R-3.8ci OR R-20 | R-14ci | R-19 + R-14ci |
| Total R-Value: | N/A | R-18.64 | R-36.59 |
| Effective R-Value:c | N/A | R-17.64 | R-31.11 |
| Design U-Factor: a, b | U-0.064 | U-0.056 | U-0.033 |
| Effective U-Factor: c | N/A | U-0.056 | U-0.032 |
| Assembly Air Permeability | 0.04 cfm/ft2 @75Pa | 0.0005 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. | ||