Help with a bar-b-q. Does a diffuser take the place of lava rocks?

Question

I am a first time gas bar-b-q user and am feeling incompitent with the process. If you do use lava rocks do they go ontop or below the diffuser. Thanks for any help

Answer 1

If you have a diffuser ( like one brands "flavor Bars " ) they are designed to be used without lava rock or ceramic briquettes. If it has what looks like just a regular grate you should use them. On top of the grate of course.

Answer 2

On top. Lava rocks help spread the heat out and also maintain it after the grill is off (for keeping stuff warm). It also catches grease droppings.