Two stud corners, exterior insulation, and hardi trim.
I’ve been trying a few of the popular advanced framing building details by drawing them in CAD, and I’ve come across a few questions / observations that I’d like input on. I’m using 2″ of exterior insulation and furring strips, for either LP SmartSide or James Hardi siding.
The California corner provides room for more insulation, and uses less lumber, but it seems to leave very little in the way of nailing edge on one side. For brick, this doesn’t seem like a huge issue. For board sidings, this seems to not provide enough room for screwing in a furring strip, and getting the trim on right. I suppose it could work if the furring strip extended out one way, but that seems flimsy.
That situation can be remedied by going to a three stud corner, essentially moving the California stud (I just made that up, not sure what it’s called) flush with the exterior plane. That doesn’t seem particularly stout either, even when supported on the three sides. I suppose it works fine as a nailing edge, but flexible compared to traditional 4 stud corners.
Near window openings and doors, the removal jack studs, and extra king studs leaves me in the same situation, especially with window bucks for a flush aesthetic with the trim and siding. Again this seems to work fine for brick cladding, but not that well for exterior insulation with furring strips. I’ve found myself adding king studs to work around this, or turning one flat towards the exterior to have a wider nailing surface, but still doubting its strength.
This is in regard to advanced framing, but it seems that exterior insulation actually requires a little more lumber than ‘advertised’ to get the details right, while being structurally sound, and being practical. Am I thinking about it wrong, or is this common, and typically worked around in the field?
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