I installed a head linner in my TJ. The main reson was when it was very hot out my son would bake in the rear seat and in the winter the cold would just
poor off of the top.
What I did is use this company
http://www.cabinsulation.com/headliner.htm
They come in diffrent thicnesses I used the 1" thick in black perferated.
It is unreal how much quiter it is in the jeep. You can actualy talk with out yelling.
As you know its like driving around inside a big base drum. Sterio sounds alot better.
I have a black top and in the sun on a hot day you cant put your hand on the inside of the
roof it was HOT. Now I even have to turn the A/C down it gets so cold in the jeep.
any one in the back seat used to complain it was hot back there from all the radiant heat
comming from the inside of the top. No more of that.
With one roll I could almost do two jeeps.
It was about $100.00
I could of done a little better job cutting in the rear, This stuff is 1" thick. I used 3M adhesive
and around the edges and the ribs I used a mastic adhesive. That was kind of smelly but in about ten days the
smell went away. I have had this in 90 deg weather baking the top in the sun and the adhesive is holding strong.
Like I said earlier, Its warmer when its cold and cooler when its hot. I was shocked by the noise reduction. I can talk
and not yell when driving. The cuts don't have to be great in the front because its hiden by the roll bar and visors.
The rear has to be cut straight.
I was having a heat problem threw the floor since I put on a Kilby belly up skid plate. The froor was getting so hot that on a cool day it was to warm so I installed this foil insulation that is about 1/4" thick I ran it two plye on the trans tunnel, fire wall,
and front and rear floors. It also has made a big difference in the the inside the jeep plus it also cut way back in noise. I put
some on the tail gate and inside the door and now my door close with a thud.