I picked up my 95 Civic EX back in April. The first thing I noticed was how much road noise I could hear with all the windows rolled up. I figure it came with the territory (ie: not a "problem" per se, just what you get with a somewhat affordable compact car).

What I ended up doing was gutting the interior and laying down a bunch of FatMat (you can also use similar stuff called DynaMat or Brown Bread) to deaden the sound. Yes, I put all the interior pieces back in.. lol I only did the back half of the car (between the front seats and the trunk) and the doors so far. It helped quite a bit with the road noise, but now it makes the engine noise a lot more noticable. This spring I'll finish it up, and probably lay down a layer of carpet padding uner the front seats and firewall area.

One thing to consider is that if you're trying to make your car "fast" ( ) then this will add 5-10 lbs of weight to the car depending on how much insulation you use. I don't care about trying to make this thing fast (I've got other vehicles for that), just want it comfortable for the many miles I put on it for work.