5820 wrote:I'm going to add a sheet of polystyerene between the floor and carpet/sound deadening to stop them soaking up water that sits in the foot wells ;) I wouldn't put polystyrene down. It breaks up under pressure and when wet it removes paint over time. I had boat hulls sitting on Polystyrene blocks and it ruined the paint. It can also cause problems to electrical cable insulation and gives off nasty gases when warm. I work with polystyrene. There are plenty of better non water absorbent products out there admittedly they do cost. Adrian