Headliner Insulation..???

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nodemon

nodemon

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I'm putting sound deadener down on the floors of my 72 Demon.. Do people put the deadener or insulation...or both in before the headliner..?
Opinions, pictures and ideas welcomed..!

Thanks..
 
There’s none in my ride, but I see the glue on the tin top that held something up before the headliner… I’d just put sound deadener up then the headliner.
 
Even some jute or light insulation up there does alot for sound deadening.. totally worth it while your in there.
 
It is worth adding sound deadening to your roof before you install a headliner. The roof is one of the main areas that affects the temperature of the car. When you insulate it correctly, you will keep the car more comfortable, and it will help reduce road noise too.
 
I always add something. The last time I used that foil bubble insulation that they sell in a roll for garage doors. It is cheap but DONT use it if you have the perforated headliner as it will show through.
 
On my old '66 Barracuda we went to the fabric store and bought some batting. Worked well.
 
would dynamat be acceptable to use on the roof?
 
mad dog said:
would dynamat be acceptable to use on the roof?
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I think I would use a felt type material which is available from summit and others. glue it up with 3M super 77 adhesive sprayed on roof and the material...let dry then stick it.
 
mad dog said:
would dynamat be acceptable to use on the roof?
Click to expand...

I dynamated my 70's roof, and then put the double foil sided insulating blanket ( available at Speedway Motors or Aircraft Spruce) on top of that. I use use that aluminum, wax paper backed foil duct tape along the edges and any seams to hold it up there.I have a black perforated headliner, and the foil doesn't really show through the perforations.

I used the same technique to cocoon the entire interior from the windshield to the rear window and up both sides including the doors.

When I get in the car and close the door with the windows closed, it sounds like I'm sitting in a bank vault. The car is quieter than a Bentley going down the road. An added benefit is how much cooler it is in the summer. It also keeps fumes out.

Dynamat or Fat Mat is really only good for stopping the resonation of the panels. It will still transfer hear through, as it just takes more time. It's the foil back jute that really does the heat, sound and fume rejection.

I learned about this technique when researching how to insulate small aircraft. They also recommend only using Dynamat in strips to reduce overall weight. It still does a great job of dampening panel resonation with the surface only half covered using strips of material.
 
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jbc426 said:
I dynamated my 70's roof, and then put the double foil sided insulating blanket ( available at Speedway Motors or Aircraft Spruce) on top of that using that aluminum, wax paper backed foil duct tape along the edges and any seams to hold it up there.I have a black perforated headliner, and the foil doesn't really show through the perforations.
Click to expand...

This the stuff you use over the dynamat? I've never seen it before but it makes sense.
https://www.amazon.com/dp/B075NPTXSG/?tag=fabo03-20
upload_2022-6-3_11-25-37.png
 
gzig5 said:
This the stuff you use over the dynamat? I've never seen it before but it makes sense.
https://www.amazon.com/dp/B075NPTXSG/?tag=fabo03-20
View attachment 1715936845
Click to expand...

That is the single sided stuff, but yes. I use that aluminum foil duct tape that has the removable wax paper backing to seal the seems and secure the mat to the car's interior. I custom cut and fit a dozen or more panels together to make one complete covering, much like a tailor does with material to make clothes. Then I tape it together and finally tape the edges down. It makes a great heat and vapor barrier. It's pretty lightweight too.

Aluminized Heat and Noise Insulation Shield, Double Sided
 
jbc426 said:
That is the single sided stuff, but yes. I use that aluminum foil duct tape that has the removable wax paper backing to seal the seems and secure the mat to the car's interior. I custom cut and fit a dozen or more panels together to make one complete covering, much like a tailor does with material to make clothes. Then I tape it together and finally tape the edges down. It makes a great heat and vapor barrier. It's pretty lightweight too.

Aluminized Heat and Noise Insulation Shield, Double Sided
Click to expand...
It's not too thick..?
jbc426 said:
That is the single sided stuff, but yes. I use that aluminum foil duct tape that has the removable wax paper backing to seal the seems and secure the mat to the car's interior. I custom cut and fit a dozen or more panels together to make one complete covering, much like a tailor does with material to make clothes. Then I tape it together and finally tape the edges down. It makes a great heat and vapor barrier. It's pretty lightweight too.

Aluminized Heat and Noise Insulation Shield, Double Sided
Click to expand...
That's not too thick..? Does it not "bulge" in spots..? On the edges..? What do you use to adhere to the roof..?
 
nodemon said:
I'm putting sound deadener down on the floors of my 72 Demon.. Do people put the deadener or insulation...or both in before the headliner..?
Opinions, pictures and ideas welcomed..!

Thanks..
Click to expand...
I covered the inside of the roof 100% in Vixen with Klimat. It's good insulation and good sound deadener too.
 
nodemon said:
It's not too thick..?

That's not too thick..? Does it not "bulge" in spots..? On the edges..? What do you use to adhere to the roof..?
Click to expand...

I have not had issues with it bulging in spots. It can compress down to the thickness of matchbook paper. On the flatter areas on the floor, I even doubled up the mat.

I sanded, primed and top coated the interior roof metal, and then used a spray bomb contact adhesive. I seal the edges down with the aluminum foil duct tape with half the width of the tape on the mat and the other half on the car's interior surface.

Here are some pictures of the insulation I did in my '68 convertible during my Vintage Air install. Notice how I used the foil tape to seal and hold down the edge in the last picture.

Insul4.JPG


Insul5.JPG


Insul6.JPG
 
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