double layer may not solve the rattling sound problem, i've got 2 layers and still getting pissed off by the intermittent noise that spoils my mood when trying to enjoy some music on the move. worst, embarrassing when fetching guests with the new but squeaky car
i've sent my ride to TCM 3 times; even left the car there for 2 days for a more thorough job. noise level was a lot better after much insulation and "moisturizing" (to the leather parts) are done. i think insulation is the way towards better noise reduction.
imo, the latio's interior is very badly made despite being very spacious and having nice suede upholstery; i expected more from a MIJ car (a TC selling point too). dashboard, front/rear seats & door panels are all too noise capable. when car goes over uneven floor, we get the tubberwares rubbing against each other and flimsy plastic door panels "singing" together at times. never had this problem with other makes i've driven before (dun count the >10yrs COE cars).
sad to say this but if can go back in time, will probably stay away from latio despite its good FC and competitive price
