I did exactly the same thing 10 years ago. I used an adhesive that was
recommended by the carpet store, kind of thick, applied with a notched
trowel.

Messy, but worked great. Still looks good today.
Jim

jsheesley wrote:
My friend has a 1979 34' Silverton that he wants to replace the carpet
in. All the walls are carpeted and a lot of the ceiling as well. We
are thinking contact adhesive. Let it tack up and stick it to the
ceiling and hopefully it stays. We would be thankful for any ideas.