Typical spread footer design to 8″ wall. Slab poured inside walls. 2×6 framed walls . So..the question…..if you justify the framing to the exterior of the poured walls there would be 2 1/2 inches of exposed wall to the interior….plus your 1/2 inch islolation material…total of 3 inches exposed to the interior. 1/2 inch drywall on the framing plus 3/4 inch trimis1 1/4 coverage. Which means your finished slab starts 1 1/4 past the finished wall. Need to prepare to tile the floor and that screams crack to me.
Would you run a 2 by at grade height on the interior of the wall forms to make the Isolation joint move in under the base?
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Not sure what's going on with your desription of existing conditions, but if you're prepparing for tile over conc. slab, then you might want to consider installing a decoupling membrane (like Schluter's Ditra or Ditra XL) between your tile and slab. This will seperate your slab from finish materail in terms of structural lateral movement. As long as you have adequate bearning everwhere tile is being laid (and observe any necessary control joints,, then you shouldn't have an issue with your finish tile or grout cracking. My guess is that you can span that short distance over the isolation material at the perimeter with a decoupling memberane without any issues.
Note: YOu may want to skim grind (diamond cup wheel) or float (leveling compound) the concrete and isolation material joint smooth to make sure that the joint planes out nicely with the rest of the slab before installing the membrane. Sometimes these edges are fairly rough.
Notching top of concrete wall is the way to go..
Running the slab all the way to the face of the studs is the way to go. Notch the top of the foundation wall to allow that to happen...otherwise you are almost sure to get a crack in your floor as some minor differential settlement is inevetible. Be sure to thoroughly compact the grade below your slab to minimize any settlement.
Concrete wallsm
Exactly what I thought........thanks