If it's going onto concrete floor then you will have to use some sort of moisture barrier, in this case I would use the combined barrier/underlay material you can get at most of the sheds.
Hi
>
> I've just bought some cheap laminate flooring from Homebase which claims to
> have integrated underlay ("No underlay required"). The integrated underlay
> amounts to a very thin layer of green plastic stuff. The best comparison I
> can come up with is a very thin layer of artex (in appearance, not feel). >
> Has anyone used this stuff? Would you recommend using underlay anyway? It's
> going onto a concrete floor (downstairs lounge).
>
> Thanks
> Tim
>
>