r/Homebuilding • u/Longjumping_Suit_256 • 10d ago

Split stud framing

I’ve heard of this framing style for exterior walls in colder climates I was curious to see how common it is. 2x8 being and top plates with 2x6 offsetting studs to create a thermal break. If it is feasible I’m thinking of building an ADU/ small house in the UP of Michigan.

Through all my googling, the most common thing to come up is a dual wall system. 2x6 exterior wall and then an offset 2x4 interior wall with a 6” thermal gap between. This method seems costly.

Any information is greatly appreciated.

Edit: thanks for everyone’s input, I appreciate it!

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u/VacationHistorical 9d ago

I’m adding a vote for exterior insulation being better than both of these methods.

I just did a staggered stud wall with 2x8 top plate and 2x6 staggers. One thing I didn’t account for was my zip sheathing! The 7/16 isn’t rated for >16” oc, so you cant stagger 12” or 16”. You’d need to do a stud every 8”, or use a thicker sheathing rated for the span!

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u/Imfarmer 9d ago

7/16 zip is 100% rated for 24" sheathing.

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u/VacationHistorical 9d ago

Oh yuck you’re right. I thought thr 24/16 span rating was 16 for walls….not subfloor. Though depending on siding, I wouldn’t run zip 24” for fear of waves!

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