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Carpet underlayment

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Old May 7, 2023 | 08:34 AM
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Default Carpet underlayment

We are starting to replace the interior of our 78.
We intend on using a hush mat type product under the carpet and behind the dash.
My question is, is hush mat good enough under the carpet or do we need to install another underlayment under the carpet? Thanks
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Old May 8, 2023 | 07:22 AM
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Good question. I am wondering how thick one can go without causing issues with getting the carpet to lay right.
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Old May 8, 2023 | 07:06 PM
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I am in the middle of putting the sound/thermal barrier down, and plan on putting the original padding back in over it. Not sure how it will fit, but the rear compartment should be OK on the flat surfaces as the barrier (Dynamat) isn’t very thick.
I was told the original padding were date stamped? Not sure this is true, can’t find it on mine, but will look again.
Going to put the original carpet back down, as it looks good after a thorough cleaning with only a wear spot under the clutch that is hidden by the floor mat.
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Old May 8, 2023 | 07:55 PM
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For myproject....any mat/insulation thicker than 3/8" caused problems in corners...I actually removed the jute backing because the new mat/insulation is so efficient....but I used HVAC wrap/sound deadener which is twice the thickness of dynamat/hushmat....


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Old May 8, 2023 | 08:46 PM
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Thanks all.
The sound barrier is 1/8” thick so I guess I’ll install new factory style underlayment and then the new carpet.
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Old May 8, 2023 | 11:40 PM
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I'm doing a 78. The barrier I used is from B-Quiet and is thin. 1/16th thick or so. Standard thickness jute over that. Forming it around the rear wheelwells is not fun.

Padding in the front is dense. Not so dense or thick under the seats. Original style firewall pad.

Takes a fair bit of contact cement and patience to fit wheel wells.
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