Some sort of surface under floor

[MN_JohnH]

I have a crawlspace under this addition and there is a surface there at the level of the bottom of the floor joist with no thickness and I can't click on it to figure out what it is.
I can't get the file down to under 14mb even zipped so I have a link to a dropbox file https://www.dropbox.com/scl/fi/moyz5trozohubrrg0cycp/Problem.plan?rlkey=4fn1ul395kdfz0t0i5rtgaq63&st=i7jc3hjt&dl=0
That is not a room so there is not ceiling there I don't think.
Camera #14 shows the space where the problem exists.

[jmsisco]

Edit the floor structure to what you require. It is currently concret and Framing 

Edited 17 hours ago by jmsisco

[MN_JohnH]

17 minutes ago, jmsisco said:

Edit the floor structure to what you require. It is currently concret and Framing 

Thanks, The concrete is a 1.5" overpour for the floor heat, it is on top of the OSB sheathing.
I don't think that would cause my problem but obviously I am missing something.

[ChiefTylerL]

Hello @MN_JohnH,

You don't have any kind of foundation room definition so the software is seeing your entire building as cantilevered, so what you're seeing is the cantilever underside material. 

 

One solution would be to open your Room Specification, go to the Materials panel, select the cantilever underside material, and change it to No Material or Insulation Air Gap. 

 

I hope this helps!

[MN_JohnH]

44 minutes ago, ChiefTylerL said:

Hello @MN_JohnH,

You don't have any kind of foundation room definition so the software is seeing your entire building as cantilevered, so what you're seeing is the cantilever underside material. 

 

One solution would be to open your Room Specification, go to the Materials panel, select the cantilever underside material, and change it to No Material or Insulation Air Gap. 

 

I hope this helps!

Thanks, I could find a way to eliminate the material on the cantilever but I just drew in invisible foundation walls and that fixed it. I figure it was something like that but I didn't think to try it.
Thanks for leading me in the right direction.