slab warmer than air

[eaadams]

Here is a first. Slab is warmer than the air. (it has been colder than average in California) RH results should be lower right?

2" slab on Bitumin layer on 6" slab on an old cemetery (so they don't want to remove the slab for fear of the un-dead! har har har)

[Rubensgt40]

Well, yeah, all things being equal the warmer air inside the slab would mean a lower %.

But if there's zombies involved, all things are not equal.