Another Headliner Question

[glundblad]

I am about to replace my headliner. I wondered if since the headliner was removed, the carpet panel underneath the rear window and the b-piller trim were both removed, should I add additional insulation behind those areas?

 

I know a lot of people have done that but I was curious if it really made a difference at deadening the sound?

[flint54]

I think it made a big difference, not just for sound but also for heat.

I have no data to back up my perception, but the use of reflective

layers has been well documented to reduce radiant heat gain. I put

the stuff in every place I could possibly reach, often cutting small

pieces to fit into crannies, like cab corners.