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Complexity |
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This wall is moderately easy to construct. Trades can easily understand the methodology used to construct this assembly. Special care must be taken to ensure adequate fasteners for thicker levels of rigid insulation. Stud spacing at 24” o.c. may require additional bracing if tiles or cabinetry is intended to be installed onto a section of the exterior wall. Note that the number of floors supported may determine the required stud spacing. The structural wood panel may act as a nailing base for the vinyl siding as well as brick tie attachment and may also be used as a substrate for stucco and/or foam plastic sheathing. A wood sheathing panel thickness of 7/16” is recommended to provide adequate racking resistance for the assembly. It may be possible to build this wall in a prefabrication process. |
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Cost |
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This wall may be expensive to construct. Material costs are typically high for some of the wall assembly components such as thick Exterior insulating sheathing. Labour unions may charge premiums for installation of some Exterior insulating sheathings depending on type and location in the assembly. Additional time for construction details may result in added labour costs. Overall lumber costs may be reduced by up to 20% by using advanced framing. Advanced framing can also lower the amount of insulation that needs to be added to the assembly. |
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Moisture Vulnerability |
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This wall is moderately durable. The vinyl siding acts as a rain screen and is non-absorptive, helping to avoid solar-driven moisture issues. To improve drying to the inside, a variable permeance smart vapour retarder may be used as an alternative to polyethylene. Proper detailing around penetrations such as windows and doors is required to minimize any risk of moisture related issues. On-site construction moisture must also be appropriately managed. |
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