Mod needed that gives fill

[yzerman19]

I am currently trying to surround my Santuary with a concrete fence topped with barbed wire. The thing is, after the pieces snap togehter, they stay at the same level. And when the elevation of the ground drops, an empty space is left below the wall. What I request is a mod that gives fill, possibily out of crushed stone or soil. Then the player would not have the problems that I currently suffer from.