Is it safe to put the item down (in this case, wall repair compound) anywhere near a wall? Or where a wall would be if one were there? Acutally I'm not sure I'm thinking this through correctly. Would that help me to build up walls that are not there or is it only for fixing some kind of broken wall? I mean, I have walls, but they could be larger...or maybe that's how they're supposed to be lol? I was thinking the same thing about a roof & whether one would be built but then how would you see inside? So now I think I'm convincing myself to return that wall compound to the store. I guess at some point a wall will break & then I'll need it. But if anyone wants to tell me!