Can place things on top of them... thus, quite lame. If you want to place something on top of a carpet tile, you have to lift the tile up, lock the item down, raise it, and any other items on the spot 2 tiles, THEN put the carpet back down, then lower everything. Oh and it seems like if there's a painting poking up from a lower floor, that raises the carpet 1 tile, so you have to go take the painting down, then follow the above steps, then go lock the paining down once again. I was excited to have this addition, but since its such a giant pain to deal with, Im just going to stick with my old 3x3 heritage carpets sadly. Its nice that they didn't want to make them cost us extra lockdowns, but they really should just be like rubble carpet, which I have and use in my home.