On Sun, 11 Jan 2009 10:41:08 -0800 (PST), sid
wrote:

Most of the basement is lined with Owens Pink Foam-board. If I use
this foam-board to insulate the wall of the furnace room, can I leave
it exposed ? Do I need to finish the walls ?

Thanks


It makes sense to finish the walls with drywall then paint. You'll
have an additional layer of insulation plus the paint will brighten up
the room and make it easier to keep clean. Both drywall and paint are
inexpensive.