Cariboo

I installed some roofing underlayment ( like dynamat) in my car in the spring and still seem to hear a little road noise.

I removed the front and rear seats and the carpet and put two layers of the underlayment directly to the floorboards. I also removed the door panels and put this material on the inside of the door in addition to the metal touching the door panel.

Although you can never get rid of ALL the noise, how much of it is coming from the glass or the headliner?

Thanks,

Cariboo

jbekuykendall

Sounds super nice! How much did this end up costing you??

ou sig

the vast majority is coming from the glass/headliner like you said. The TL and most new/nicer cars have plently of sound deadening material from the factory. Some now have "quiet glass" to help also.

also, some SD materials are better for certain frequencies than others. You need thick, carpet like materials to absorb the road noise the best (what came from the factory). So the stuff you put on may not help much at all for that type of noise.

Cariboo

I work for a roofing manufacturer so it didn't cost me anything.

Word for the wise: Roofing underlayment and Dynamat do the same thing. The type of roofing underlayment that I used was a 40 mil non-reinforced membrane with a traffic type film on the surface. Make sure that you use a product that has a film or foil surface. Many of the underlayments have a sanded surface which would be a mess.

I also will try adding some carpet padding type material to further help with the road noise, as "ou sig" suggests.

Seotaji

the glass is wayyy to thin on our cars.

the door seals are also a bit shoddy.

i drove a new buick earlier today and the door glass was almost twice as thick as ours. it was much quieter also.

optomos

The glass is the weakest link in our cars for letting noise in, especially around top. Those wind deflectors that go around the top of the windows might help.