NCARB Practice Exam - Insulating wall cavity values
Hi Everyone, me again haha.
I have another question about this answer, why is the R6.75 (compliant) for the rigid insulation in the brick veneer cavity
Hi Ariana. This is a steel frame building, non-residential. It needs R25 ci in the roof and R13 + R5 ci in the walls. Choice A doesn't have enough insulation in the walls that's cotinuous Choice B doesn't have enough insulation in the roof. It has R24, but needs R25. Choice C is the only one that has enough insulation in the roof and walls. It needs R-5 or more c.i. = continuous insulation, which is insulation that is not in between the studs. Hope this helps!
Rebekka O'Melia, R.A., NCARB, B. Arch, M. Ed, Step UP ARE 5.0 Courses
The scenario states that the building is a “exterior brick veneer with a metal stud back up wall“. The choices for above grade walls include mass, metal building, steel frame or wood framed. The metal building choice has an asterisk on it, which states below that a “metal building” is a pre-engineered rigid frame, fabricated offsite. That is clearly not what this building is. It’s also not a mass building or wood framed so steel framed is the only correct choice it could be.
Hope this helps and keep studying!
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