A truck from the local fire department stopped by to check out our SolarGlass roof. They were wondering about venting in case of a fire and whether they could walk on the tiles. I showed them the spare tile we have have and went over the clip system for removing the tiles. Also pointed out it is glass and when wet is very slick. All and all a great bunch of guys. I invited their other shifts to come by and see the roof and PowerWalls.