What’s more, Exterra’s perforated laminate lets vapor escape the wall assembly, keeping the cavity dry. It comes in 3 board thicknesses that match those of the Zip System: 1.0-inch, 1.5-inch, and 2.0-inch. With corresponding dimensions, abutting Exterra boards can sit flush with the Zip System panels.īecause Exterra forms a water-resistive barrier, the entire exterior wall can be built without house wrap. Halo’s Exterra is a continuous rigid insulation that suits this application well. You must provide insulation between sections of Zip System R-Sheathing panels and make sure the 2 components fit flush together. Much like structural wood sheathing, Zip System R-Sheathing panels can be installed only at corners and certain intervals along the wall assembly to provide the required resistance to wind and seismic loads. These panels usually comprise EPS foam boards bonded to the side of a laminated OSB board.Īs these products use Structural-1 OSB as the bracing element, they comply with both the NBCC and IRC prescriptive requirements for lateral bracing. Then there’s the Zip System R-Sheathing system, which combines lateral bracing and insulation into a single product. These thicknesses are perfect for accommodating the slightly thicker, braced wall sections. To ensure that the insulation’s exterior face is flush along the entire wall, you must use thinner insulation panels at the braced corners than you would over the stud wall.įor the continuous insulation component, Halo® Exterra® comes in thicknesses of 0.563 and 0.625 inches. The framed wall gains between 3/8-inch to 1/2-inch of extra thickness at the braced corners because of the structural sheathing panels. Put simply, UCAST provides the perfect balance between support and comfort, optimizing patient. While both the NBCC and the IRC afford many prescriptive paths to compliance, these structural panels may be used to only brace corners and sometimes a certain percentage of the braced wall lines.Īdding shear walls to a stud assembly increases the wall depth in certain places. Do splints, casts and braces lead to different outcomes. According to the National Building Code of Canada (NBCC) and the International Residential Code 2015 (IRC 2015), intermittent wood structural sheathing sections are a compliant bracing option.
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