IceBlossom - yes, the batting will be permanently fastened to the foam board. Two months ago we moved from the four bedroom house we lived in for 30 years to a two bedroom condo, so now I'm setting up my new sewing room.
In the house, I just used large pushpins to fasten the batting right to the wall, but obviously that's not ideal. And we're renting and the landlord probably wouldn't appreciate it.
I've got some chemical sensitivities so spray adhesives are out, and besides, we're on the second floor and other than the balcony, there's no place to do anything like that.
QuiltE, I think I might give the duct tape a try - I just found a brand new roll of it when I was unpacking. And I agree - once you've had a design wall, it's hard to quilt without one!