I plan on replacing my headliner for a more personal look and while I'm at it I figure I would insulate under there as well. I've done a little reading about different products, but was wondering what others have had good results with.

I was thinking about using this stuff from Home Depot:

https://www.homedepot.com/p/Everbilt...x7-5/307281317

Seems easy to use and I have some quality HVAC tape that I can use to secure it together and in place. My only concern is the tape losing its adhesive properties and the insulation just falls down and it is laying on the cardboard liner in the next couple years.
Or does the stuff get applied to the cardboard headliner and not directly to the underside of the roof?

 

About using it? Not really sure.
About it falling down? Does it matter? I mean it is still up there.
I sound deadened first. Not the whole ceiling but sections.

Only doing partial coverage comes from some people saying anything more then 25% was kind of a waste.
Then I used this closed cell foam pool foam from Home Depot.


https://www.homedepot.com/p/Blue-Wav...1970/207063475

But I did not pay that much. Cost me $40.47 with tax.
I just used strips of Velcro attached to the roof and foam to secure it to the roof.
Did not even use good 3M Velcro but some cheap stuff from Advanced or Auto Zone.
It probably has since come down and is on top of the headliner.
Was it smart using that stuff? Not really sure.
Guess I will find out the next time I take the headliner off.
Which I hope to be never. LOL.

 

That's what I would use. I'd probably use a spray adhesive, though. I do like Ralph's sound deadening, too.

 

All sound like good ideas. I'm not really sure on thermal properties of an insulation and whether its attached to the surface (roof or liner) or if its just floating in between the 2 surfaces and if its still effective.... interesting question.
I guess if I think about the fact that my house insulation is squeezed in between the walls, and is laying on the floor of the attic, it would make more sense to me that the insulation has to be making complete contact with one of the surfaces to be effective. If not, then the hot air is just circulating above, below, and around the insulation, essentially making it useless. And if the insulation was on the roof, thats not really keeping hot air out as efficiently as having it lay on the headliner. if it was more effective to be on the roof, insulation would be in between the 2x4's of our homes attic roof and not laying on the floor of the attic.
So I suppose it would be easiest to apply the insulation to the headliner so that I have gravity on my side (even though the bubble wrap stuff has very little mass and wont necessarily be "pulled" from the roof) and I don't have to worry about tape or spray losing its adhesive properties because it's attached right to the hottest spot of the jeep when in the sun and falling down. At least if its on the headliner its not in direct contact with the hot roof I can use adhesive spray AND HVAC tape to keep it real nice and secured. Now the only other issue I see is the insulation making the headliner weight a little bit more and the cardboard wants to start sagging, But again, that bubble wrap weighs very little.............

 

I'm planning on using this on the roof
I just haven't decided if I want to use the Noico sound deadener also.

 

That looks better than the bubble wrap, Eaton.

 

There are few reviews saying that all it is but then a lot of good reviews so who really knows.

 

Unless it's a complete scam, that's closed-cell foam. Not bubble wrap at all, and a much better insulator.

 

Yeah sometimes it's odd how extremely different Amazon reviews can be for the same product.

 

Good thing I won't see it once it's under the headliner hahaha

 

So you think closed cell would insulate better than bubble wrap that has a silver foil like layer on both sides? I guess it makes sense because bubble wrap has those small areas that aren't "bubble" and is just 1 layer of plastic....although it IS covered on both sides with the silver reflector lining...

I do have about 6 foot of 24" foil covered bubble wrap. Maybe I can find a piece of closed cell and do some kind of heat transfer experiment with my temp gun.....

 

how about this stuff....???

not bubble wrap, but styrofoam double lined with a foil lining. Not this EXACT product, but something similar because I dont need enough to cover a garage door...

 

No question. The foam has a measurable R Value. The bubble wrap, despite many claims, has almost no measurable R Value. Foil? That foam has the foil on both sides, too, and unless you have an air gap between the foil and the next layer, it does nothing. Yep. Radiant barriers do nothing when they are in contact with the next surface.

https://duckduckgo.com/?t=ffnt&q=clo...=v171-1&ia=web

 

No linky!

 

I applied the noico like Ralph and then used .25 inch closed cell foam. It had 1-sided adhesive. I put 2 layers of foam and then covered with the headliner.