Sealing seems/gaps between XPS insulation
I'm insulating our basement with 2" XPS. What should I be sealing the seams with before taping? Some really don't have any gap, but some have a tiny sliver of space. Also we have 9' walls and there are some larger gaps between the full sheets and the piece I had to cut to cover the top. Should I go with spray foam in those spots before taping?