![](/static/66c60d9f/assets/icons/icon-96x96.png)
It is your choice on sanding. Sanding down the crack/tape area below grade will make the flattest patch. The alternative is feathering out your joint compound further to hide the bump. You’ll be surprised how thick tape seems when you’re going for a smooth finish.
I like the flat (presanded) option because the bump option bothers me even though nobody else sees the difference.
Yes, and you have to dig deep in some places to get below the frost with your foundation. In those places a basement makes sense because you’re digging that far either way. Texas frosts don’t get very deep, so you’re able to have a shallower foundation making a basement just an extra cost.