Carpet or ?? for interior walls?

My new (old) teardrop has an aluminum skin with no interior walls. I fear that condensation will be an issue, since my tent already has such.
I've seen a couple of TDs that have carpet on the interior walls, a couple with paneling (beyond my skill level) and a couple with some sort of plastic/ tileboard??
I know almost nothing about TD construction, having purchased this trailer this week
I'm reading everything I can find, so pointers are in order also.
Thanks
<Chas>
I've seen a couple of TDs that have carpet on the interior walls, a couple with paneling (beyond my skill level) and a couple with some sort of plastic/ tileboard??
I know almost nothing about TD construction, having purchased this trailer this week

I'm reading everything I can find, so pointers are in order also.
Thanks
<Chas>