Why are family tombs individually sealed?

I went to a funeral today and the casket was laid in an above ground crypt. The casket was pushed to the back of the crypt presumably to make space for the next family member. Before sealing the crypt, a separate barrier was installed to completely seal off the first casket. The barrier looked to be a piece of plywood and it was not only screwed in place, it was caulked airtight.
The question is, why go to this bother? Why does each individual need to be sealed into their very own space?
If its a question of smell

  1. wouldn’t the smell find its way out anyway?
  2. could not the casket be sealed?
  3. does an embalmed body smell anyway?

I don’t have the answer, but I just thought I’d chime in and say that’s an interesting question…

At least in New Orleans, they don’t have to provide space for all the coffins.

From here:

Funny you should bring this up - I’ve been doing research for a Staff Report (which will be published next week) on a very similar topic.

Separate bedrooms, to keep the kids from scrapping? :smiley:

Ooooh–so going to Hell for that…

Giving this one more try. Any morticians out there?