No. There can always only be one tile graphic at a tile position. (Else we would have seen a truckton of junk-on-the-roof graphics by now.)
to clarify, you can put multiple tiles on top of each other a slong as the upper layers are partially transparent, however this only works in older fonlien revisions, as (for whatever reason, cause we use it) cvet removed that option of tiel alyers cause, apparently, noone ever used it (duh).
