Thor MC has never sealed the shower surround to the pan. The gap is there to provide circulation for condensation on the outside of the shower surround, so excessive moisture runs down into the shower pan. There should be a 1 to 1.5" overlap of the surround and the pan. Only if you drop the hand held sprayer with the flow on would there be a chance of water getting outside the shower surround while showering.Here are pictures..
Have not used much do folks caulk these?
I had read that somewhere as well.No. They are supposed to breath so not to mold up.
During the PDI I was told by the tech not to caulk the shower pan. On our first trip we noticed that water was getting out of the pan because the MH was not perfectly level, so I found a product made by a company called Grabbars (Water Dam) , installed it and no water problems since. Its a bit pricey at $50 but worth it IMHO.
Coveman2