Can tile, cement, and grout rubble be used as fill under crawl space vapor barrier?

Question

I am remodeling my bathroom (one of two) and was thinking how I can reuse the demolition debris instead of throwing it away. As one of my future projects was to encapsulate my crawl space, one of the steps was to put in a layer of gravel then the plastic vapor barrier. Not knowing the soundness of the idea, should I use the bathroom demo material in this fashion?

Answer 1

All those things combined don't amount to much volume. If your goal is to install an inorganic layer for sanitation reasons, this doesn't do much for you. You'd need to be sure that no sharp edges protrude from the gravel layer and damage your vapor barrier or your knees.

If you really need to save refuse disposal costs, go ahead and bury it, but bury it deep.