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porjos

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I like what you did, Im just interested in the trade-offs and Im not familiar with automotive acoustic products. Would you show a side edge view of the materials you used and how you think they worked?
This is unscientific, but I laid them together and used a quarter as reference. You're losing about ~3/8's inch of headroom

PXL_20211126_161349122.jpg

 

MayhemMike

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Free for us 1st year orders - but for those buying after, that's what's listed on the Ford Accessories site
The headliner is free on the MY 22 build and price page as well. You have to select the option if you want it, but it is no added cost.
 

jtim47Bronco

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After finding out the Ford NVH headliner is essentially $480 carpet, I decided to make my own headliner. For $260 I got:

* Dynamat mats (67 Mil thick - butyl rubber with aluminum backing, self-adhesive)
* 1/8 thick Dynaliner closed/open cell foam (self-adhesive)
* Some charcoal grey indoor/outdoor carpet

Here's the finished driver's side, in comparison to the bare MIC on the passenger side:

PXL_20211125_215018868.jpg


It was relatively simple:

Step 1: Clean and prep surface
Step 2: Apply sound deadener wherever it wasn't obstructing the latches or the weather stripping where it's seated on the vehicle.
Step 3: Apply closed/open cell foam to the recessed parts of the top for increased sound deadening/insultation.
Step 4: Measure and cut some carpet, I used a combination of Gorilla spray glue and well-placed VHB/3M strips.

Result: The sound improved greatly, and that's what I was looking for - still noisier than a Prius of course, but night and day compared to the bare MIC.

PXL_20211125_213816227.jpg


PXL_20211126_161404529.jpg
looks very nice. are you for hire? lol.
 

Bronc-itis

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When I had originally ordered a hard top, I was planning on doing the same thing because a sheet of fleece is not sound deadening. Another thought I had was having a shop spray on truck bed liner. The extra layers you put on should make a big difference. Good work!

I will say to anyone attempting this to use a good adhesive like Landau adhesive and not the spray can adhesives. The aerosol adhesives can't stand up to heat and will quickly release.
The canned adhesive (3M) works well. You just have to let it set up before you apply. Then reactive with a hair dryer or heat gun.
My plan for this is similar. I’m going to use dynamat first, then spray bed liner over top of the dynamat to seal it in. Should add less weight and be a little quicker of a job.
 
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The canned adhesive (3M) works well. You just have to let it set up before you apply. Then reactive with a hair dryer or heat gun.
My plan for this is similar. I’m going to use dynamat first, then spray bed liner over top of the dynamat to seal it in. Should add less weight and be a little quicker of a job.
I'm not going to lie, that sounds like a better plan - it took me two and a half afternoons for the way I did it...most of which was spent meticulously cutting & measuring the mats/foam/carpet so all the angles lined up just right.
 

Bronc-itis

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I'm not going to lie, that sounds like a better plan - it took me two and a half afternoons for the way I did it...most of which was spent meticulously cutting & measuring the mats/foam/carpet so all the angles lined up just right.
I’ve fantasized about how I would tackle this for a while. The other part of this project would be to paint match the outside of the top. Then PPF the entire thing.
 

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The canned adhesive (3M) works well. You just have to let it set up before you apply. Then reactive with a hair dryer or heat gun.
My plan for this is similar. I’m going to use dynamat first, then spray bed liner over top of the dynamat to seal it in. Should add less weight and be a little quicker of a job.
I know a little about acoustic science, and the point in this application is to absorb the sound waves, not reflect. Since bedliner is capable of repelling water, its probable that that (epoxy) bedliner material would reflect --bounce-- sound waves as well. Putting dynamat on first will help with vibration and similar road noise, but would not help with interior noise with a reflective coating. If you can find a sprayable absorbent material, that might work.
 

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I know a little about acoustic science, and the point in this application is to absorb the sound waves, not reflect. Since bedliner is capable of repelling water, its probable that that (epoxy) bedliner material would reflect --bounce-- sound waves as well. Putting dynamat on first will help with vibration and similar road noise, but would not help with interior noise with a reflective coating. If you can find a sprayable absorbent material, that might work.
True. My main consideration would be blocking road/outside noise. And any NVH that resonates through the roof panels.
 

lakesinai

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True. My main consideration would be blocking road/outside noise. And any NVH that resonates through the roof panels.
Share when you figure it our. I've wondered about that spray rubber in a can but that also may be too reflective while also being somewhat absorbent
 

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Butyl rubber damps out vibration. Over that an absorbing layer should be used. Felt is the best absorber you can buy for the money. Can buy sheets of it between eighth inch thick to over an inch. I'd suggest .5 inch minimum.
Bed coating would likely not help at all and maybe even hurt the butyl layers efficiency.
 

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This could be another good way to eliminate the factory inner liner flocking from falling on you. Of course you would first have to remove it. I don't know how healthy the factory roof sound deadner /liner is after looking at it in a mannequin sitting at the dealership. We happened to catch it falling inside after brushing it with our hand, when the sun was behind us looking into the driver side. This is going to be a very dusty environment of which we will be breathing in. Just a thought to be concerned with for some.
 
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Anyone interested in a shaggy carpet?

It looks really good. Well done!
 

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So you opted out of the free headliner, and then added tacky carpet to the panels anyways?
 
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Well done. This is great stuff. We took delivery of a 2 door BD last week and opted out of the factory "sound deadening" in order to follow a similar path. It sounds like you had a significant improvement on the road/wind noise and I am sooo glad to hear that.

If you did it again, would you change anything on the Dynamat products? I was going to do the same thing on the first two layers, but then cover those with a carbon fiber wrap vinyl in lieu of the carpet.
 
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So you opted out of the free headliner, and then added tacky carpet to the panels anyways?
They were out of pink velvet. I don't drink tea with my pinky out, friend - I'm not fancy. The real upgrade (and cost) was the sound deadening and insulating material - the carpet just hides that. I picked it because I liked the rugged but thin properties.

 

 
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