How do I lock my wall heights?

[HouseJackBuilt]

How do I keep my wall heights from reverting back to default?

When I build a garage with 12ft high walls, then when I build the 2nd floor - it brings my first floor garage walls down to default 9ft walls. 

I had this problem when I did an addition. The walls in the original house were 6ft high, when I worked on another part it brought it back to default. I was unable to fix it then too.

I'm sure it is something stupid.

 

Thanks,

Jack

[HouseJackBuilt]

For further information I am running a X15.

[TeaTime]

37 minutes ago, HouseJackBuilt said:

then when I build the 2nd floor

When you hit Build New Floor, take a look at the options, there's one for floor heights and one for roofs.

[SNestor]

Wall heights are controlled by the height specified in the room...or, floor defaults. Rooms will derive their height from the "floor default" height.