I was afraid of that. I have not been able to find a way to fix that, at least not yet. So I think it depends on what you made the foundation. Now, I haven't had a chance to play with things, but can you place one of the half-walls there and color those? Again, I don't know if it's possible. I haven't had time lately to play Sims, unfortunately, but thought I'd throw a couple ideas out there for ya.