What to use under carpeting?

66HOTROD · Dec 11, 2018

Any opinions on soundproofing and/or heat blocking materials under floor carpeting? Thanks!

Kern Dog · Dec 11, 2018

The answer will depend heavily on your intended use of the car. Some here have has good results with "Spray-on" type products. Others have used "peel and stick" panels consisting of a black tar/asphalt type product with a foil backing. The latter is available in a multitude of thicknesses. There are many brands as well. Some are butyl rubber, some are asphalt based. Some give off a strong smell like roofing tar. THOSE are the cheapest but certainly not the best in my opinion.
I went with a brand called Rattle Trap.

Evan Frucht · Dec 11, 2018

all the brands that say they are better, its just a marketing scam IMO. Just go with "Peel and Stick" or "Quick Roof"

FAT MAT is in fact an asphalt based product, just like the roofing stuff... don't waste your money on it

as far as butyl vs asphalt based... they both smell like tar

personally I prefer the asphalt stuff mainly because its cheaper and easy to get

if you want to get fancy go with a product called Dynamat they are well regarded and butyl based, they MIGHT be most effective and least smelly

its mainly about thickness, the thicker mil, the better it will be at sound deadening and insulating.

just my experience, i'm sure some experts who've spent way to much time obsessing over this will disagree with me :bs:

Runner 68 · Dec 11, 2018

We just went through this. Foil lined butyl rubber is all the same. It ain't rocket science.
This stuff worked very well for us and the price was right.
https://www.amazon.com/Kilmat-Deadening-automotive-Insulation-dampening/dp/B0751G6TMV

Gold Rush · Dec 11, 2018

My floor has a layer of DynaMat covered by another 3/8 inch DynaPad layer. The result is just AMAZING!!!

halfafish · Dec 11, 2018

I used a product called EZ Cool from a company called Lobucrod. It's foil backed on both sides and is not adhesive, but I had no problem getting the stuff to stay put until I had the vinyl floor on it. It's easy to work with, and very affordable compared to other choices. I will be using it again.

khryslerkid · Dec 11, 2018

I used this under my carpet. Lightweight, fire retardant, cut with a good pair of shears, cheap. Used a light coating of spray adhesive and a roll of foil tape for the seams. Car is quite and cool inside during hot days. I used it on the inside of the roof before installing headliner also.

You have to order it online. It's not in their stores.

https://www.homedepot.com/p/UltraTo...er-with-Recycled-Cotton-30000-11424/100661257

Kern Dog · Dec 12, 2018

My Charger:

65RoadRacer · Dec 12, 2018

I went with DEI's Boom Mat sound proofing and Under Carpet Lite insulation. DEI, unlike some other companies, won't pitch using the sound dampening on every square inch - they advise just to use it on flat surfaces, as the curved surfaces don't prove that tinny sound that a flat floor pan does. This means less material and easier installation.

shutting-down-interior-heat-and-road-noise-with-dei-0023.jpg

shutting-down-interior-heat-and-road-noise-with-dei-0024.jpg

https://www.streetmusclemag.com/tec...g-down-interior-heat-and-road-noise-with-dei/

Kern Dog · Dec 12, 2018

I have read even from other sources that the matting need not cover everywhere. Its purpose is to provide a resistance to flexing and the resonance that results from it.

71SandbugCharger · Dec 12, 2018

I went with Dynamat, but talking with the DEI guys at SEMA this year, I would have gone with their lesser cost, but just as effective solutions.

69 GTX · Dec 12, 2018

I had totally stripped my car, so underneath (road side) I sprayed ceramic lizard skin (heat barrier).
Then on the inside a layer of their sound deadener, then a layer of Dyno mat, then a layer of rubber mat (just lays on top off the dyno mat, no adhesive). Then the insulation & carpet will be applied over that.
I also put the dyno mat inside the doors & quarters.
Over kill I know but I wanted it cool & quiet.

dla4567 · Dec 12, 2018

I covered everything with Dynamat then a layer of jute padding from Home Depot. Very pleased with the results.

Racefish · Dec 12, 2018

66HOTROD said:
Any opinions on soundproofing and/or heat blocking materials under floor carpeting? Thanks!

I used peel n seal. Worked great and inexpensive.

2quick · Dec 12, 2018

Sprayed Lizard Skin Sound Deadener then Thermal Barrier on top of that on the entire inside of the car, Inside doors, Roof, Firewall, and package tray. Not cheap though like $400 just in material plus the gun.

33 IMP · Dec 12, 2018

I'm curious if anyone got a weight on the material they added for sound and heat. I used the thinnest cheapest indoor/outdoor carpet I could find, with nothing underneath. If I remember right, total weight was well under ten pounds, covering floor, backseat area, and package shelf.

69 GTX · Dec 12, 2018

I bet I added at least 100lbs with what I did.

Ron H · Dec 12, 2018

I went with Dyno-Mat as well. I had stripped down the interior and put on several coats of gray primer before putting in the mat. Anyone having done this knows the elbow grease involved! It did make a difference; but since my '63 Plymouth is a droptop marginal results.

beanhead · Dec 12, 2018

I used 'Mega Mat', made by The Fat Mat guys...butyl-based rubber type, no smell, one roll did my car from the top of the firewall to under the backseat. I had enough extra to cover most of the underside of the package tray as well. Works well and reasonable cost.

Speedbird · Dec 12, 2018

Check out Kilmat
It MAY be the most cost effective butly product.
I found and used it after much research of comparable products.
It's to cancel the cymbal effect.
So far, so good.
Available on Amazon.

On top of that I used
https://www.amazon.com/Car-Insulati...srs=13389716011&ie=UTF8&qid=1544650422&sr=8-1
for heat and sound proofing.
It is VERY light weight and thin as is the Kilmat.

I avoided felts and things that would hold mold, dust and moisture in the pans.
The caveat is you are asking about carpet.
I did use some felt material on the tunnel and to even out the vinyl.
I used molded vinyl from ACC and will post that install in a separate thread.

Car Insulation - 4' x 10' Roll (40 Sqft) Sound Deadener & Heat Barrier Mat - Automotive Lightweight Thermal Insulation

Kilmat 80 mil 36 sqft Car Sound Deadening Mat, Butyl Automotive Sound Deadener, Audio Noise Insulation and dampening

What to use under carpeting?

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