Thanks, guys! I hadn't read about the durock/osb concern. I'm planning to use a dual burner electric hot plate for heat and smoke so I don't think my temps will get very high. Do you know at what temperature that becomes a concern? I'll do some research on it.
BG, morning..... Hot plates don't work well as a heat source... there is an over temp limit so the burner housing will not get hot.....