[AllanJ]

The difficulty with laminate flooring on the ceiling is holding it in place. The material is heavy enough that you need lots of fasteners, and it may also expand and contract differently compared with the building structure so the fasteners have to allow some side to side give.

You do not want nails or screws right through the middles of the planks because it is almost impossible to refinish the surface of laminate.

You might use brads in the tongues and grooves but this may make it more difficult to insert each succeeding plank.

You do not need tar paper or underlayment or membrane over and above what other kinds of ceiling finishing materials might need for moisture barrier, etc.