Sound Deadening and Jute
Thread Starter
Pro
Joined: Mar 2013
Posts: 628
Likes: 13
From: Indiana
Sound Deadening and Jute
I've tried to sift through all the post to get a definitive answer but am still confused. The original jute backing was for heat and sound deadening. Once you install some kind of modern sound deadening material you should no longer need the jute. Those of you with experience doing this, did you also reinstall the jute or just install the carpet over the new sound deadening material? Adding the jute could cause fitment problems because most newer material is quite thick. I have a roll of Rattle Trap and I'm thinking of doing this over Winter/Spring hibernation. I just as soon not use the jute but if it most be done I will.
Race Director
Joined: Apr 2009
Posts: 19,294
Likes: 2,754
From: Charlotte NC
If you apply an adhesive back foil product. And then a foam pad like "Dynapad". I (personally/professionally) do not use the jute because it is overkill and is not going to do anything to greatly improve what was just installed....and will hold moisture( if wet) and also odors...and will break down over time...in the used area of the carpet. If my customer does not want to pay for the Dynapad. ...then I do apply the jute....because at least installing "something" is better than nothing....and it duplicates what was factory installed. The jute used in days past has been surpassed by technology in acoustical/heat barrier products of today. Some manufacturers still use it..but most REALLY NICE cars do not use it from the factory any more. It is the way it is. Much like ..when have you seen an 8-track tape for sale in a store?
By the way...SURPERB JOB JoeC!!!! I KNOW what time you had in that job.
DUB
By the way...SURPERB JOB JoeC!!!! I KNOW what time you had in that job.
DUB
Last edited by DUB; Nov 9, 2013 at 09:20 PM. Reason: add info
Thread Starter
Pro
Joined: Mar 2013
Posts: 628
Likes: 13
From: Indiana
I agree. Great job Joe C. I hope to do half the job you did. So you put the jute over top of the foil backed matting? I'm afraid that it would be too thick in some places. Do you have to glue the jute to get it to stay in place? Wow that looks great!
Drifting
Joined: Feb 2013
Posts: 1,465
Likes: 12
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
I used HushMat, which looks the same as Joe C's stuff. It's very thin (about 1/8" thick), so I put the jute on top of it. It didn't cause any problems that I remember.
I did cut away the HushMat around the studs that the seat rails mount on so the rails were more solidly and directly connected to the body.
I did cut away the HushMat around the studs that the seat rails mount on so the rails were more solidly and directly connected to the body.
Race Director
Joined: Aug 2000
Posts: 11,470
Likes: 764
it made a noticeable difference in the sound quality, but it wasn't lexus quite. the sound coming through the doors was more noticeable - I didn't use the foil backed stuff in the doors, but I did use the late-model C4, foam, factory door liners. if I had to do it again, I would have gutted the doors and installed the foil mat to the inner door skins. overall, the 85 felt more solid, so there was a noticeable difference. the down side is the added weight - probably about 40 pounds
If you apply an adhesive back foil product. And then a foam pad like "Dynapad". I (personally/professionally) do not use the jute because it is overkill and is not going to do anything to greatly improve what was just installed....and will hold moisture( if wet) and also odors...and will break down over time...in the used area of the carpet. If my customer does not want to pay for the Dynapad. ...then I do apply the jute....because at least installing "something" is better than nothing....and it duplicates what was factory installed. The jute used in days past has been surpassed by technology in acoustical/heat barrier products of today. Some manufacturers still use it..but most REALLY NICE cars do not use it from the factory any more. It is the way it is. Much like ..when have you seen an 8-track tape for sale in a store?
By the way...SURPERB JOB JoeC!!!! I KNOW what time you had in that job.
DUB
By the way...SURPERB JOB JoeC!!!! I KNOW what time you had in that job.
DUB
Racer
Joined: Jun 2010
Posts: 365
Likes: 27
From: Shelby Township Michigan
On my 93 coupe I used fat mat rattletrap for my installation. I reused the original jute in the back because it was already conformed to the back of the car. At the same time I installed new mass backed carpet over it and didn't have issues. In the picture the black is boom mat spray. In the front I used new padding that came with the carpet kit. On the bulkhead behind the seats I only reused the foam type pad that was there. On my doors I just replaced the vapor barrier with the foam type and are very happy with the sound quality.
Some tips: clean the SMC before applying the fat mat, don't try to use the biggest piece possible as smaller pieces are easier to apply, press the edges of the mat with a roller and it will join together, degrease edges with non chlorinated carb cleaner when overlapping the mat, tap on areas to see where matting is necessary, use spray on hard to reach areas
Good luck!
Some tips: clean the SMC before applying the fat mat, don't try to use the biggest piece possible as smaller pieces are easier to apply, press the edges of the mat with a roller and it will join together, degrease edges with non chlorinated carb cleaner when overlapping the mat, tap on areas to see where matting is necessary, use spray on hard to reach areas
Good luck!
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
it made a noticeable difference in the sound quality, but it wasn't lexus quite. the sound coming through the doors was more noticeable - I didn't use the foil backed stuff in the doors, but I did use the late-model C4, foam, factory door liners. if I had to do it again, I would have gutted the doors and installed the foil mat to the inner door skins. overall, the 85 felt more solid, so there was a noticeable difference. the down side is the added weight - probably about 40 pounds
I bought a HushMat kit for the front of a full sized car. I couldn't believe how heavy the box was.
Race Director
Joined: Jan 2000
Posts: 16,489
Likes: 25
From: USA. Northern Virginia
Wow! There are some real considerations here on what insulation matt to use…or not use in the case of factory jute.
I’m researching these issues and products for a carpet install story I’m working on. Feel free to drop me a PM if you have any additional “tech tips” or comments you’d like to share.
Thanks!
I’m researching these issues and products for a carpet install story I’m working on. Feel free to drop me a PM if you have any additional “tech tips” or comments you’d like to share.
Thanks!