Fiber Cement Cladding with XPS Ultra Continuous Insulation & Wood Stud Backup






 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*Carlisle705
 Continuous Insulation*Dow2 1/2" Styrofoam Ultra XPS
 Cladding Attachment System*Knight WallHCI System
 Fiber Cement Cladding**SVKColormat

* 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
(IECC 2015 - Wood Framed)


Design R-Value: aR-13 + R-3.8ci OR R-20R-14ci  |  R-19 + R-14ci
Total R-Value:N/AR-18.64  |  R-36.59
Effective R-Value:cN/AR-17.64  |  R-31.11
Design U-Factor: a, bU-0.064U-0.056  |  U-0.033
Effective U-Factor: cN/AU-0.056  |  U-0.032
Assembly Air Permeability0.04 cfm/ft2 @75Pa0.0005 cfm/ft2 @75Pa

Clear wall meets energy code thermal requirements without stud cavity insulation.

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.

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.


Click here to download a complete copy of this opaque wall Basis of Design package