From a couple of years ago, pizza stone on the Weber BBQ with the lid raised on bricks and some lumps of firewood in with the charcoal. Wrapped the gaps with tin foil but heat was so fierce it melted but managed to get a couple of pizzas done. Next time maybe some ultra heavy foil.
It's the heat from above rather. You need to get the trapped air to expand before the dough starts to cook, hence you need to whack it under the grill ASAP
From a couple of years ago, pizza stone on the Weber BBQ with the lid raised on bricks and some lumps of firewood in with the charcoal. Wrapped the gaps with tin foil but heat was so fierce it melted but managed to get a couple of pizzas done. Next time maybe some ultra heavy foil.