Slab on Grade Capillary Break
I’m under construction on a slab on grade project with traditional frost footings at a 4′ depth.
Below is the detailed drawing.
We have a capillary break between the footing and foundation wall because ~12″ (it varies) of the foundation wall extends above grade and will constitute a small portion of the ground floor walls.
We are water proofing and insulating the exterior portion of the foundation wall.
Do we also need to water proof the interior portion of the exterior wall that is below grade? If we don’t, what is the point of the capillary break on the footing?
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