Hello. I am in the process of converting my crawlspace to a basement. There is a section of foundation footing that is at such a depth that rather than my floor slab being laid on top of the footing and butting up against the bottom of the foundation wall, the slab will be even with the footing (i.e. top of slab even with top of footing). Is there anything wrong with this approach? The exterior of this section of the foundation wall only has a soil depth of about 18" so I'm not really worried about the wall being pused in due to lack of resistance on the interior. Thanks.